Nct Fail On Emissions?

emjv1

Hi People, Have no experience posting, just failed nct on emissions with a 97 seat ibiza 1lt, 66,000 on clock. Engine Temp: 90oC High Idle(2830rpm) Lambda: 1.05 (should be between 0.97 and 1.03) CO: 0.77% (above 0.30% fail) HC: 403ppm (above 200ppm fail) Low Idle passed but i have no idea what any of this means and tester wasn't exactly bothered explaining the problem. Anybody had this problem and ideas how to fix with as little expense as possible it would be much appreciated.

pa990

try running the car with a mix of 30% e85, available from maxol

I'm listening

emjv1 wrote: »

Hi People, Have no experience posting, just failed nct on emissions with a 97 seat ibiza 1lt, 66,000 on clock. Engine Temp: 90oC High Idle(2830rpm) Lambda: 1.05 (should be between 0.97 and 1.03) CO: 0.77% (above 30% fail) HC: 403ppm (above 200ppm fail) Low Idle passed but i have no idea what any of this means and tester wasn't exactly bothered explaining the problem. Anybody had this problem and ideas how to fix with as little expense as possible it would be much appreciated.

My car failed on emissions two years ago also, brought it to a Garage and it was sorted for around €70, for this years NCT I bought a type of engine treatment fluid that you mix with the fuel and the car had no problems with emissions this year.

emjv1

Will any old garage do or do they need special equipment? Also the e85 would i just throw a bottle in on top of petrol in tank?

zilog_jones

E85 is 85% ethanol fuel, you get it at the pumps not in a bottle.

itarumaa

HC: 403ppm this value is shockingly bad result, it means that car is running quite rich, because it is not burning the petrol properly.

What is cause for this, hard to say. Have you checked the basic things like sparkplugs or air filter.

I do not think that E85 would help, since the values are quite over the top.

For instance my s40 Volvo (98,2l petrol) had HC 17ppm in similar test.

duffman13

Try get some Dipetane! My car was well out, the father in law gave me a bottle of green stuff called dipetane and hey presto! Make sure ya get the engine nice and warm going in though

I'm listening

duffman13 wrote: »

Try get some Dipetane! My car was well out, the father in law gave me a bottle of green stuff called dipetane and hey presto! Make sure ya get the engine nice and warm going in though

Ya, that's the stuff I got too. Around €14 for a litre bottle. Works for Diesel and petrol

Ush1

itarumaa wrote: »

HC: 403ppm this value is shockingly bad result, it means that car is running quite rich, because it is not burning the petrol properly.

What is cause for this, hard to say. Have you checked the basic things like sparkplugs or air filter.

I do not think that E85 would help, since the values are quite over the top.

For instance my s40 Volvo (98,2l petrol) had HC 17ppm in similar test.

Yep, I recently changed my air filter, done NCT today and was 10ppm at high idle.

emjv1

Ush1 wrote: »

Yep, I recently changed my air filter, done NCT today and was 10ppm at high idle.

Couldnt find dipetane, bought wynns clean burn emissions reducer recommended for nct will this help?
Had no idea what to check or change so would i be able to get and change air filter by myself?

zilog_jones

Air filter is relatively easy to replace, but it sounds like you have a pretty serious emissions problem there. When was the car last serviced?

I'm listening

emjv1 wrote: »

Couldnt find dipetane, bought wynns clean burn emissions reducer recommended for nct will this help?
Had no idea what to check or change so would i be able to get and change air filter by myself?

If I was you, I'd look around at garages for a quote and get the problem sorted properly for around €60-€80. Not a big thing to do.
After that then, buy Dipetane, best out there at the moment I think and use it now and again when filling your car.
For every tenner of petrol you put in you use X amount of the bottle (explained on it), don't use too much as excessive use can be damaging.
Basically buy a bottle use it up over the year and emissions should be grand, it also reduces fuel consumption

emjv1

I'm listening wrote: »

If I was you, I'd look around at garages for a quote and get the problem sorted properly for around €60-€80. Not a big thing to do.
After that then, buy Dipetane, best out there at the moment I think and use it now and again when filling your car.
For every tenner of petrol you put in you use X amount of the bottle (explained on it), don't use too much as excessive use can be damaging.
Basically buy a bottle use it up over the year and emissions should be grand, it also reduces fuel consumption

Where do you buy Dipetane? Thats not a bad price to get it fixed, i just wanted to sound like i knew what the problem was before going as they tend to jack up the price where i'm concerned :P No service history with car, recently bought cheap so could do with a service i'm sure just threw it through the test because it was booked before i bought the car.

zilog_jones

It could cost anything to fix depending on the source of the problem. I'm listening could have had a completely different fault.

As itarumaa said you should start with the simple things like plugs and the air filter. Dirty old oil doesn't help things either.

I'm listening

Yeah Zilog is right, very broad area.
I'm just going on my experience and that of a relative who also failed NCT due to emissions.
Yours might not necessarily be the same.

Hopefully doesn't cost ya that much.

emjv1

I'm listening wrote: »

Yeah Zilog is right, very broad area.
I'm just going on my experience and that of a relative who also failed NCT due to emissions.
Yours might not necessarily be the same.

Hopefully doesn't cost ya that much.

Ok so replace plugs,filter and use dipetane. Will a garage check the emissions before i re test it?

itarumaa

I would change oil and filter as well, specially if oil looks really black. Many of those tasks (air filter, spark plugs) you can do them by yourself, it should not be too hard.

Then I would just drive the car so it would hot enough, use that dipetane and hope for the best:)

emjv1

I'm listening wrote: »

Yeah Zilog is right, very broad area.
I'm just going on my experience and that of a relative who also failed NCT due to emissions.
Yours might not necessarily be the same.

Hopefully doesn't cost ya that much.

Been to 4 different garages and they all contradict each other as to the cause of emissions. One said dipetane wouldnt help, emissions too high. other said a change of filters,oil etc would not make any difference at all. One tried to change the converter without even looking at car and all this has left me more confused than before, god i hate mechanics!

kodak

Similar problem with a friends car except a lot worse,

Idle was CO 2.6 %, meant to below 0.5% or 0.3%
High rev was Co 4.6%, meant to be below 0.5% or 0.3% can't remember

The other ppm was way high too like around 350ppm

Lamda was .83 (too low) 0.97-1.03

99 Ford Fiesta

Any ideas?

biko

Besides using Dipetane/whatnot to add to the fuel it could be worth taking it to a garage and let them have a look. Failing emissions could be a collection of small things; filters, dirty plugs etcetera but also be something more serious that should be addressed rather than the small things. A mechanic would be able to tell you.

You can do all the small things and then have emissions tested again. Galway Car Service have an emissions tester. I haven't been there so can't vouch for work.

emjv1

Magnus wrote: »

Besides using Dipetane/whatnot to add to the fuel it could be worth taking it to a garage and let them have a look. Failing emissions could be a collection of small things; filters, dirty plugs etcetera but also be something more serious that should be addressed rather than the small things. A mechanic would be able to tell you.

You can do all the small things and then have emissions tested again. Galway Car Service have an emissions tester. I haven't been there so can't vouch for work.

The car just had its re-test this morning and everything is worse!!

BEFORE: High Idle(2830rpm) AFTER: High Idle(2820rpm)
Lambda: 1.05 Lambda: 1.07
CO: 0.77% CO: 0.83%
HC: 403ppm HC: 479ppm

Cannot understand how it's so bad. Car has been serviced last week and a broken centre box repaired. Also ran Dipetane through it for the last few days and gave it a really good run to the centre. Has anyone any more ideas of what could cause this in the space of a week? The Nct man said it's running rich and misfiring but that means nothing to me

BrianD3

Not surprising TBH, servicing a car rarely fixes an emissions problem. Also i'm dubious about Dipetaine and other "mechanic in a bottle" quick fixes.

The car needs to be brought to a good mechanic with a gas analyser and good diagnostic skills. The fact that your car has lambda of 1.07 (slightly lean condition) but high CO and HC would probably give an experienced person a good clue straightaway.

You might have a google and find some technical info for yourself eg this page
http://findarticles.com/p/articles/mi_qa3828/is_200509/ai_n15353762/

biko

Does the car smoke a lot? White/blue?
High HC can mean that engine oil is being pushed up past the pistons and will cause the petrol to not ignite properly in the combustion chamber.
High HC = unburned petrol goes out the exhaust.
Make absolutely sure your oil level is at the min mark on the dipstick.

But then would affect low idle more....

mullingar

Your Oxygen Sensor may be gone.

These measure the %oxygen in the exhaust as the % of Oxygen has a direct link with the HC emmissions as the ECU increases/decreases the air/fuel mixture until the oxygen output is correct.

If the sensor is faulty, emissions will be way off.

Edit:
New DIRECT FIT sensor for €34 + postage
http://cgi.ebay.ie/NEW-Direct-fit-Oxygen-Lambda-Sensor-SEAT-IBIZA-mk2-1-0_W0QQitemZ250526316578QQcmdZViewItemQQptZUK_CarsParts_Vehicles_CarParts_SM?hash=item3a54883822

emjv1

mullingar wrote: »

Your Oxygen Sensor may be gone.

These measure the %oxygen in the exhaust as the % of Oxygen has a direct link with the HC emmissions as the ECU increases/decreases the air/fuel mixture until the oxygen output is correct.

If the sensor is faulty, emissions will be way off.

Edit:
New DIRECT FIT sensor for €34 + postage
http://cgi.ebay.ie/NEW-Direct-fit-Oxygen-Lambda-Sensor-SEAT-IBIZA-mk2-1-0_W0QQitemZ250526316578QQcmdZViewItemQQptZUK_CarsParts_Vehicles_CarParts_SM?hash=item3a54883822

Thanks for replys lads,car with mechanic, hopefully will know more soon, thanks for the link, will local garage fit a new sensor if i bought it myself though assuming thats the problem?

emjv1

emjv1 wrote: »

Thanks for replys lads,car with mechanic, hopefully will know more soon, thanks for the link, will local garage fit a new sensor if i bought it myself though assuming thats the problem?

Mechanic says the cat is fecked so have to fork out for a new one and it still might not fix the problem has to be retested before 19th or it goes in for full test again so i hope it fixes the emissions :mad:
Also he said the HC's were not helped considering the gob****e at AdvancePitstop overfilled the oil ffs!!

mullingar

Cats can be big money and would be the last thing I would change.

First check air filter then check colour / condition of spark plug. And replace if damaged or worn

retest car.

If it fails then change oxygen sensor as result indicates rich mixture

Retest car ( yes is e30 but cheaper than a cat)

failing that replace cat

retest

BrianD3

Cats can be big money and would be the last thing I would change.

First check air filter then check colour / condition of spark plug. And replace if damaged or worn

retest car.

If it fails then change oxygen sensor as result indicates rich mixture

Retest car ( yes is e30 but cheaper than a cat)

failing that replace cat

retest

Would it not be a better idea to try to find someone who actually knows how to diagnose a car instead of using the "replace parts and see what happens" method. It sounds like the OPs mechanic is using this bolt on diagnostics method - he'll replace the cat - but doesn't know if it's going to work. I wonder does he even have a gas analyser or is he just hoping for the best when the car goes in for its NCT. Maybe he's a "Fred in a Shed" type operation.

The OP has already wasted his time with Dipetaine and changing the air filter. It was entirely predictable that Dipetaine would be useless for a car with such high emissions. Yet he was still advised to use it.

emjv1

BrianD3 wrote: »

Would it not be a better idea to try to find someone who actually knows how to diagnose a car instead of using the "replace parts and see what happens" method. It sounds like the OPs mechanic is using this bolt on diagnostics method - he'll replace the cat - but doesn't know if it's going to work. I wonder does he even have a gas analyser or is he just hoping for the best when the car goes in for its NCT. Maybe he's a "Fred in a Shed" type operation.

The OP has already wasted his time with Dipetaine and changing the air filter. It was entirely predictable that Dipetaine would be useless for a car with such high emissions. Yet he was still advised to use it.

I was told by someone on here to use dipetane and the car just had service last week so plugs, oil , filters etc have been changed already.Mechanic has gas analyser, was shown results after he done them himself and he's someone i know so i'm not worried about a 'fred in a shed' scenario His results were actually worse than Nct centre as he says his equipment is far more thorough than theirs?. I asked him about the lambda being changed and he said that it's not going to fix the issue and i'd have to spend money on a cat after that anyway.

New cat won't fix the lambda value. *That* will be waste of money. Take it somewhere that knows what they are doing.

emjv1

samih wrote: »

New cat won't fix the lambda value. *That* will be waste of money. Take it somewhere that knows what they are doing.

Should have mentioned he also found a hole in the exhaust tract which i believe can cause the lambda values i got.

emjv1

Well lads thought i'd update on the whole sorry mess.Sorry i bought the poxy car now.:mad: New cat went in last Friday and also he welded few small holes in exhaust tract and he put it through his own analyzer and it passed. Drove it for the last week with Dipetane and FAILED Nct AGAIN yesterday!! Which means it has to go through whole test again and god knows what else they will find then. Results as follows:

1st Test: temp105c 2nd Test: temp 81c
High Idle 2820rpm 2680rpm
Lambda 1.07 1.01 PASS
CO 0.83 0.36 FAIL above 30 fail
HC 479ppm 335ppm FAIL above 200 fail

So the lambda has passed prob due to welding holes, the cat did not fix original problems. Everything better but not enough. Ideas please??

kazul

Spurious or genuine CAT? Spurious ones are crap, you should feel the weight difference. I opted against a Bosal spurious one for my car and got a 2nd hand one from a scrappie instead, passed 2 NCTS since (just)

emjv1

kazul wrote: »

Spurious or genuine CAT? Spurious ones are crap, you should feel the weight difference. I opted against a Bosal spurious one for my car and got a 2nd hand one from a scrappie instead, passed 2 NCTS since (just)

He said it was Bosal, said it would last better than 1 i wanted 2 buy from internet.

itarumaa

emjv1 wrote: »

Well lads thought i'd update on the whole sorry mess.Sorry i bought the poxy car now.:mad: New cat went in last Friday and also he welded few small holes in exhaust tract and he put it through his own analyzer and it passed. Drove it for the last week with Dipetane and FAILED Nct AGAIN yesterday!! Which means it has to go through whole test again and god knows what else they will find then. Results as follows:

1st Test: temp105c 2nd Test: temp 81c
High Idle 2820rpm 2680rpm
Lambda 1.07 1.01 PASS
CO 0.83 0.36 FAIL above 30 fail
HC 479ppm 335ppm FAIL above 200 fail

So the lambda has passed prob due to welding holes, the cat did not fix original problems. Everything better but not enough. Ideas please??

You have been informed that car is running rich, you have informed that you should not change the cat because that is not the problem and still you go ahead and change the cat and use Dipetane even many people said that it might not work.

Also from your post:
"The Nct man said it's running rich and misfiring but that means nothing to me "

That is the problem with your car and that is the problem have been there from the start.

What color were the sparkplugs when they were changed, black?
Do you get spark in every spark plug? Is the car running at all cylinders, have you checked ignition coil and leads?

You need to find out why the car is running rich or find a good person to find it out, not just change part after part and hope for the best and it would not hurt to actually read and follow the advice you get. I informed you at the first page that the car is running rich and it still does. That is the reason your HC value is high, because High HC means that you car is not burning all the petrol it gets.

kazul

emjv1 wrote: »

He said it was Bosal, said it would last better than 1 i wanted 2 buy from internet.

He also wasn't going to make money on the sale if you bought one off the net. Bosal CATs are an inferior product IMO

biko

Well what you've done so far has lowered the emissions significantly.
There's a good read here

If the HC is very high and the CO is close, you probably have an ignition/ compression related problem. Check the ignition system first. This usually caused by an ignition miss. Then check the engine. Poorly seated valves, leaking head gaskets, or other compression problems will put the HC readings through the roof. Also check for vacuum leaks and the injector spray patterns. Remember, HC failures are usually caused by compression or ignition problems. Improper fuel distribution/vacuum leaks will cause misfires that will cause excessive HC.

emjv1

itarumaa wrote: »

You have been informed that car is running rich, you have informed that you should not change the cat because that is not the problem and still you go ahead and change the cat and use Dipetane even many people said that it might not work.

Also from your post:
"The Nct man said it's running rich and misfiring but that means nothing to me "

That is the problem with your car and that is the problem have been there from the start.

What color were the sparkplugs when they were changed, black?
Do you get spark in every spark plug? Is the car running at all cylinders, have you checked ignition coil and leads?

You need to find out why the car is running rich or find a good person to find it out, not just change part after part and hope for the best and it would not hurt to actually read and follow the advice you get. I informed you at the first page that the car is running rich and it still does. That is the reason your HC value is high, because High HC means that you car is not burning all the petrol it gets.

Really dont appreciate the tone of this reply. You seem to think i have a clue as to what i'm doing which i can happily tell you that i do not! An actual qualified mechanic is telling me what should and should not be done and i am following his advice but would like to supplement that with some helpful feedback from this forum, also i was told the cat wouldn't fix the lambda value not the HC or CO and something definitely helped as emissions are down. Also i have followed advice from people on here who told me to use dipetane and i have listened to you about the whole running rich issue but does that cause the high CO's also? HELPFUL, non insulting advice would be the way forward as i'm not a bloody mechanic

emjv1

Magnus wrote: »

Well what you've done so far has lowered the emissions significantly.
There's a good read here

If the HC is very high and the CO is close, you probably have an ignition/ compression related problem. Check the ignition system first. This usually caused by an ignition miss. Then check the engine. Poorly seated valves, leaking head gaskets, or other compression problems will put the HC readings through the roof. Also check for vacuum leaks and the injector spray patterns. Remember, HC failures are usually caused by compression or ignition problems. Improper fuel distribution/vacuum leaks will cause misfires that will cause excessive HC.

Thanks for your reply Magnus, have read the link and am better informed from it . It's great to find out what might be causing it instead of someone just telling you ur an idiot

As the lambda is close to 1.00 now it basically means your oxygen and other sensors are most likely ok.

The high HC can definitely be caused by ignition problems. HC is unburned hyrdocarbons = fuel. No "modern" engine without really angry cam profile, for example, would produce so high HC even without cat. My last non-cat car had HC of approx 100 at idle. If your car misfires it will eventually lead to a cat failure so don't drive the until the fault is found.

I would tackle the ignition system next, i.e. new sparks, ignition leads, ditributor cap and rotor (if fitted).

Was the timing belt changed recently. Maybe the engine timing is off? That normally results in high HC too.

emjv1

samih wrote: »

As the lambda is close to 1.00 now it basically means your oxygen and other sensors are most likely ok.

The high HC can definitely be caused by ignition problems. HC is unburned hyrdocarbons = fuel. No "modern" engine without really angry cam profile, for example, would produce so high HC even without cat. My last non-cat car had HC of approx 100 at idle. If your car misfires it will eventually lead to a cat failure so don't drive the until the fault is found.

I would tackle the ignition system next, i.e. new sparks, ignition leads, ditributor cap and rotor (if fitted).

Was the timing belt changed recently. Maybe the engine timing is off? That normally results in high HC too.

So the timing belt could also be the problem? Car is at 66800 mileage now and as far as i know has not been changed so it needs to be looked at then? Not my car (bought it for other half) so i only drive it to nct, mechanics etc when it has to go and if the new cat goes aswell i'm settin it alight . Ill make sure ignition sources are looked at on Monday, thanks.

biko

From http://www.smogsearch.com/faq US site, hence "smog"

Carbon Monoxide (CO)*
CO is created when gasoline is not completely burned. High CO ( running rich ).

A list of common causes of CO related smog check failure:

1. Timing is not a big factor in CO production but check it anyway. Everything helps.
2. On older Carbureted vehicles you can have problems like a partially stuck choke plate.This is the moving steel plate on the top of your carburetor.
3. A leaking power valve on your carburetor can cause high CO and Smog Check failure.
4. A faulty carburetor can cause high CO and Smog Check failure.
5. A dirty air filter can cause high CO.
6. A common cause for high CO is a faulty Oxygen Sensor. This sensor tells the computer how to fine tune the air fuel ratio.
7. Other sensors like the M.A.P.sensor , C.T.S. sensor or the Air flow meter can also effect the CO level.
8. A faulty air injection system can cause high CO. This is the Smog pump and related components.
9. A faulty Catalytic Converter can cause high CO and Smog Check failure.
10. If your car has been running rich ( high CO ) you should change your oil after you get it repaired. When you have rich condition all the fuel cannot be burned, you start to saturate the motor oil with CO and HC. This in itself can also cause a rich condition.

Bawnmore

Ok, so I have the retest tomorrow and would love to not have to go through everything again! When the car went through first, it failed on a few small things (indicator broken etc) which are all fixed, and emissions.

Car was in bad need of a service and when I did service, by the look of the plugs, car was only firing on 2/3 and were very "caked" over. I've been told that this would ruin the cat pretty fast. So after a service, CO level was down to .5 (must be under .3). Got the cat done today and thought it would be the end of it, but no luck.

Before the new cat, results were as follows:

High Idle
CO 1.2%
HC 359 ppm
Lambda 1.002
Oil Temp 85C
RPM 2660 min

Low Idle
CO 0.66%
HC 336ppm
Oil Temp 85C
RPM 760 min

So a fail on High Idle C0 and HC, and low idle Co.

After cat, results are now:

High Idle
CO .4%
HC 77 ppm
Lambda 0.985
Oil Temp 88C
RPM 3050 min

Low Idle
CO 0.39%
HC 85ppm
Oil Temp 88C
RPM 830 min

So just .11 over the C0 limit on high idle.

Garage said I needed to get a lambda sensor and that a universal (only one available to me on short notice) would be no good to me. Final peice of advise was to make sure the engine was as warm as possible going in.

So I suppose the question is - is there any way, if using the advise above in this thread, I'll be able to give that final push to pass??

Any advise at all would be HUGELY appreciated!!

Bawnmore

anybody at all??? Hitting the road now so won't have a chance to check again until later! Sorry for the bump, desperate

jonage

I fail nct for emissions; low idle CO .55 (above .5 fail) , high idle; CO .8 (above .3 fail), lambda 1.02 (pass), HC 103 ppm (above 200 - pass), so its only CO not much, I guess.. Have retest wendesday, filters and all checked before first one. I wonder- will botle of Wynnes pass me through this time? Any passed users with similar? Should I put whole bottle for half or full tank? Thanks for any advises.

Merch

I'm listening wrote: »

Yeah Zilog is right, very broad area.
I'm just going on my experience and that of a relative who also failed NCT due to emissions.
Yours might not necessarily be the same.

Hopefully doesn't cost ya that much.

your relative failed an NCT for emissions! ok sorry thats childish

emjv1 wrote: »

Been to 4 different garages and they all contradict each other as to the cause of emissions. One said dipetane wouldnt help, emissions too high. other said a change of filters,oil etc would not make any difference at all. One tried to change the converter without even looking at car and all this has left me more confused than before, god i hate mechanics!

the what? a converter? huh?

emjv1 wrote: »

The car just had its re-test this morning and everything is worse!!

BEFORE: High Idle(2830rpm) AFTER: High Idle(2820rpm)
Lambda: 1.05 Lambda: 1.07
CO: 0.77% CO: 0.83%
HC: 403ppm HC: 479ppm

Cannot understand how it's so bad. Car has been serviced last week and a broken centre box repaired. Also ran Dipetane through it for the last few days and gave it a really good run to the centre. Has anyone any more ideas of what could cause this in the space of a week? The Nct man said it's running rich and misfiring but that means nothing to me

What? a centre box, can you be more specific? a service may help, but if there is another problem
the timing is off/can check if your ignition coil/s are functional (and spark plugs plus leads)

Bring it to a mechanic that can tell you if

emjv1 wrote: »

Well lads thought i'd update on the whole sorry mess.Sorry i bought the poxy car now.:mad: New cat went in last Friday and also he welded few small holes in exhaust tract and he put it through his own analyzer and it passed. Drove it for the last week with Dipetane and FAILED Nct AGAIN yesterday!! Which means it has to go through whole test again and god knows what else they will find then. Results as follows:

1st Test: temp105c 2nd Test: temp 81c
High Idle 2820rpm 2680rpm
Lambda 1.07 1.01 PASS
CO 0.83 0.36 FAIL above 30 fail
HC 479ppm 335ppm FAIL above 200 fail

So the lambda has passed prob due to welding holes, the cat did not fix original problems. Everything better but not enough. Ideas please??

I'm kinda surprised you opted to change the CAT without getting the timing checked, ie the ignition items Coil/plugs/leads

itarumaa wrote: »

You have been informed that car is running rich, you have informed that you should not change the cat because that is not the problem and still you go ahead and change the cat and use Dipetane even many people said that it might not work.

Also from your post:
"The Nct man said it's running rich and misfiring but that means nothing to me "

That is the problem with your car and that is the problem have been there from the start.

What color were the sparkplugs when they were changed, black?
Do you get spark in every spark plug? Is the car running at all cylinders, have you checked ignition coil and leads?

You need to find out why the car is running rich or find a good person to find it out, not just change part after part and hope for the best and it would not hurt to actually read and follow the advice you get. I informed you at the first page that the car is running rich and it still does. That is the reason your HC value is high, because High HC means that you car is not burning all the petrol it gets.

I agree with this guy

-Chris-

You're replying to posts from Feb of last year. I'm sure it's sorted by now.

Thread closed.