Remap, blocked EGR

Irishmadman

Have a car with a blocked egr valve and was told to get it remapped. Has anyone had to do this, is it any good?

biko

What car is it?

Irishmadman

biko wrote: »

What car is it?

Ford focus

jca

Why would you need to get the car remapped to fix a clogged egr valve? Just replace the egr valve.

discombobulate

I think they mean get the ECU mapped to bypass the EGR.

Irishmadman

Brand new 1 is costing nearly 500 an people say just 2 clean it costs anything between 2-250 depending on the mechanic an cleaning it could only last a week

Irishmadman

discombobulate wrote: »

I think they mean get the ECU mapped to bypass the EGR.

That could be it I'm not into the technical side of cars was just wondering if people had it done an is it worth it

YbFocus

Never heard of a car needing mapping after an EGR delete.

Nothing being monitored there so it couldn't notice a change?

obezyana

Irishmadman wrote: »

Brand new 1 is costing nearly 500 an people say just 2 clean it costs anything between 2-250 depending on the mechanic an cleaning it could only last a week

Cleaning the egr is an easy job who in the hell charges so much money for cleaning the egr valve? I cleaned the egr valve on the gf and brothers car only the other day and from start to finish at a handy pace it took half an hour and both were perfectly fine afterwards.

discombobulate

YbFocus wrote: »

Never heard of a car needing mapping after an EGR delete.

Nothing being monitored there so it couldn't notice a change?

It must just be blanking with the EGR then and mapping for the DPF?

dougie-lampkin

YbFocus wrote: »

Never heard of a car needing mapping after an EGR delete.

Nothing being monitored there so it couldn't notice a change?

The Focus (both 1.6 and 1.8) has a position sensor on the EGR, and will throw an EML when it's not detecting any change in position. The 1.6 will possibly go into limp mode also, as the EGR works in tandem with the doseur flaps in the intake.

Irishmadman wrote: »

Have a car with a blocked egr valve and was told to get it remapped. Has anyone had to do this, is it any good?

Either clean it or stick a blanking plate in. Then it can be mapped out handy enough. It's pointless mapping it out until you can fully close the valve. A lot of people have blanking plates with a small hole in the centre (maybe 2mm) and they don't seem to put the EML on, you could try that as a cheap option before a remap.

I don't see how it would only last a week after cleaning, presumably it's lasted a number of years until giving trouble?

discombobulate

In terms of mapping, blanking etc. try give Joe Power a ring here: http://www.chippedire.com

Haven't used myself but gets heavily recommended around here.

navara man

dougie-lampkin wrote: »

The Focus (both 1.6 and 1.8) has a position sensor on the EGR, and will throw an EML when it's not detecting any change in position.

Have a 08 1.8tdci focus with blanking plate on it for over year now and it never put on eml light

navara man

Irishmadman wrote: »

Brand new 1 is costing nearly 500 an people say just 2 clean it costs anything between 2-250 depending on the mechanic an cleaning it could only last a week

what engine is in focus

corkgsxr

obezyana wrote: »

Cleaning the egr is an easy job who in the hell charges so much money for cleaning the egr valve? I cleaned the egr valve on the gf and brothers car only the other day and from start to finish at a handy pace it took half an hour and both were perfectly fine afterwards.

Some are easy some are a balls. Mines a 4/5 hour job

Irishmadman

navara man wrote: »

what engine is in focus

It's a 1.8

Irishmadman

corkgsxr wrote: »

Some are easy some are a balls. Mines a 4/5 hour job

Yeah my mechanic reckons mine will take as long only he reckons cleaning is only a quick fix remapping an passing the egr valve is the best way 2 go

kco3d

Any issues with emissions when blanking egr or disabling?

Would you leave a cloud of smoke behind you when accelerating hard?

Irishmadman

kco3d wrote: »

Any issues with emissions when blanking egr or disabling?

Would you leave a cloud of smoke behind you when accelerating hard?

As the car sits my engine management light is on an I've no power an when I start it there is a pile of smoke an when taking of again there is smoke but no as much as when it's starting

jca

navara man wrote: »

Have a 08 1.8tdci focus with blanking plate on it for over year now and it never put on eml light

I think there's more to it than just putting the warning light out. The egr valve is there for a reason. It's not put there for Paddy the Tractor fixer to throw in the bin.

corkgsxr

jca wrote: »

I think there's more to it than just putting the warning light out. The egr valve is there for a reason. It's not put there for Paddy the Tractor fixer to throw in the bin.

Its there to reduce emissions at the detriment of the engine. Them and dpfs will be the death of diesels.

jca

corkgsxr wrote: »

Its there to reduce emissions at the detriment of the engine. Them and dpfs will be the death of diesels.

The egr also lowers the exhaust gas temperature which in turn protects the turbo from excess heat. I can't see how reducing diesel engine emissions will lead to their demise:cool: I think the main reasons for egr/dpf problems is poor servicing and people buying daysul for the chape tax despite only doing a few thousand km's a year.

corkgsxr

Egr is closed on full throttle so when whens it protecting it from heat.

Egrs clog the engine with tar like stuff even when they work right

jca

corkgsxr wrote: »

Egr is closed on full throttle so when whens it protecting it from heat.

Egrs clog the engine with tar like stuff even when they work right

The egr opens to allow exhaust gases into the inlet manifold at various throttle openings mainly when cruising at steady main road/motorway speeds. The effect of this is to reduce the dreaded Nox emissions and also cool the combustion process which in turn cools the emerging exhaust gases. I don't know anyone who drives a diesel at full throttle for any sustained length of time...(maybe a gutless Quashqai). Lack of servicing clogs egr valves and short trips are also a killer on diesels especially trips where the engine never warms up.

navara man

kco3d wrote: »

Any issues with emissions when blanking egr or disabling?

Would you leave a cloud of smoke behind you when accelerating hard?

No smoke .and blank for last 55.000 km

corkgsxr

jca wrote: »

The egr opens to allow exhaust gases into the inlet manifold at various throttle openings mainly when cruising at steady main road/motorway speeds. The effect of this is to reduce the dreaded Nox emissions and also cool the combustion process which in turn cools the emerging exhaust gases. I don't know anyone who drives a diesel at full throttle for any sustained length of time...(maybe a gutless Quashqai). Lack of servicing clogs egr valves and short trips are also a killer on diesels especially trips where the engine never warms up.

It doesnt need protecting from heat at cruising. If it can take the heat for a sustained period at high boost like its designed then it will be perfectly fine at the 1/4-1/3 boost you use when cruising

Oil is the killer of turbos not heat

jca

corkgsxr wrote: »

It doesnt need protecting from heat at cruising. If it can take the heat for a sustained period at high boost like its designed then it will be perfectly fine at the 1/4-1/3 boost you use when cruising

Oil is the killer of turbos not heat

Tell that to a Dci Laguna driver. I'm not saying the turbo needs "protecting from heat" as you put it. The opening of the egr valve. Ah look I'm not explaining it again.... Jesus wept!!! Heat has killed many a turbo.....

jca

Irishmadman wrote: »

Have a car with a blocked egr valve and was told to get it remapped. Has anyone had to do this, is it any good?

I think this is a case of curing the symptoms and not the disease..

corkgsxr

jca wrote: »

Tell that to a Dci Laguna driver. I'm not saying the turbo needs "protecting from heat" as you put it. The opening of the egr valve. Ah look I'm not explaining it again.... Jesus wept!!! Heat has killed many a turbo.....

The dci engine has too long a oil interval. Thats what kills them.

I ran a 1.6hdi on castrol and changed often. I decatted and blanked the egr. Result it was more drivable and averaged 9 mpg more. Iv a heavy foot too. Never had turbo problems.

Turbos can take heat they cant take old bad oil

jca

corkgsxr wrote: »

The dci engine has too long a oil interval. Thats what kills them.

I ran a 1.6hdi on castrol and changed often. I decatted and blanked the egr. Result it was more drivable and averaged 9 mpg more. Iv a heavy foot too. Never had turbo problems.

Turbos can take heat they cant take old bad oil

Forward thinking people like you are an asset to engine development Laaad. Shur run her on castrol that'll cure her.....

corkgsxr

jca wrote: »

Forward thinking people like you are an asset to engine development Laaad. Shur run her on castrol that'll cure her.....

Run it on good quality oil and shorten the ridiculous interval and you'll have less problems.

Do you really think they fit cars with dpf or egr if they weren't forced? Not a hope

Chimaera

If the EGR valve is coking up on a modern diesel, you've got bigger problems that need solving before even thinking about forking out for a remap to remove it. They usually gunk up because of excess soot in the exhaust which mixes with the (normal*) oil vapour in the intake air. Excess soot points to either shot injectors or something wrong in the turbo system.

Blanking off the EGR valve isn't going to fix those sort of problems.

* A small amount of oil will always escape past the shaft seals on the turbo and the crankcase ventilation usually routes back to the intake also.

Functionally, EGR is designed to reduce combustion temperatures and therefore reduce NOx emissions. It has nothing to do with reducing heat load on the turbo, though this may be a side-effect of reducing combustion temperatures.

The jury is out on whether removing/disabling the EGR system improves economy.

@OP: Bottom line here is have your car serviced by someone who knows these engines well and has access to diagnostic equipment - you may find that the problem lies elsewhere.

jca

Chimaera wrote: »

If the EGR valve is coking up on a modern diesel, you've got bigger problems that need solving before even thinking about forking out for a remap to remove it. They usually gunk up because of excess soot in the exhaust which mixes with the (normal*) oil vapour in the intake air. Excess soot points to either shot injectors or something wrong in the turbo system.

Blanking off the EGR valve isn't going to fix those sort of problems.

* A small amount of oil will always escape past the shaft seals on the turbo and the crankcase ventilation usually routes back to the intake also.

Functionally, EGR is designed to reduce combustion temperatures and therefore reduce NOx emissions. It has nothing to do with reducing heat load on the turbo, though this may be a side-effect of reducing combustion temperatures.

The jury is out on whether removing/disabling the EGR system improves economy.

@OP: Bottom line here is have your car serviced by someone who knows these engines well and has access to diagnostic equipment - you may find that the problem lies elsewhere.

+1. As an aside, Renault UK were contributing towards the costs of early turbo failures (probably due to the scarily long service intervals as pointed out earlier) but if there was any evidence of egr messing.. No hope!