Focus jerking when driving

awec

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shietpilot

When was the last time you changed your fuel filter?

awec

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punisher5112

Clean out egr valve if you can't take apart get egr valve cleaner you need 2 for this as one needs to keep revs at around 2.5 when engine is hot only can you do this.

Service the car?
Fuel filter is also a good tip as above and air filter check it.

I know may not be but my Mondeo sucked in a water bottle lable and was blocking air flow at air filter.

mullingar

Are you 100% sure the fuel filter was also changed?

Also, 1.6 or 1.8?

awec

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DubInTheWest

It could also be the fuel pump on the way out. Same thing happened to me many years ago. Started to jerk and one day just cut out altogether. IIRC I picked up a second hand one from the breakers yard and my mechanic installed it. It was a focus too. I used to let the fuel go right down, he told me to stop doing this as any dirt in the tank can cause problems for pump.

Good luck

punisher5112

DubInTheWest wrote: »

It could also be the fuel pump on the way out. Same thing happened to me many years ago. Started to jerk and one day just cut out altogether. IIRC I picked up a second hand one from the breakers yard and my mechanic installed it. It was a focus too. I used to let the fuel go right down, he told me to stop doing this as any dirt in the tank can cause problems for pump.

Good luck

Good advice never good to let into red.

Stheno

punisher5112 wrote: »

Good advice never good to let into red.

Yep once i get to quarter full i fill up

punisher5112

Stheno wrote: »

Yep once i get to quarter full i fill up

Ever fill in a dodgy place?

awec

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pm.

"Focus jerking when driving"

The dirty b@stard

punisher5112

awec wrote: »

Fuel pump and egr valve, are these easy things for a mechanic to diagnose as clearly being the problem? Or is it one of those trial and error things?

Should be easy enough I would check egr 1st if I were a betting man

shietpilot

punisher5112 wrote: »

Should be easy enough I would check egr 1st if I were a betting man

If EGR was the problem OP would be seeing clouds of smoke when it's jerking.

awec

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punisher5112

shietpilot wrote: »

If EGR was the problem OP would be seeing clouds of smoke when it's jerking.

That really depends on driving style.

Girlfriend drives with a light foot so no smoke and no proper driving.

Me smoke at every change but I do that on purpose of course.

shietpilot

awec wrote: »

Wouldn't be able to see those when I'm driving.

I've been googling the symptoms of a clogged EGR and a dying fuel pump and it sounds like the fuel pump fits the bill perfectly. Sputtering at high speeds especially when under stress.

I'll be dropping it into a mechanic so I'll probably ask him to look at both anyway, cleaning EGR seems a fairly trivial task. Just wanted a rough idea of what could cause it.

Much would a fuel pump cost? Couple of hundred?

I think I got the EGR valve cleaned a few years ago.

punisher5112 wrote: »

That really depends on driving style.

Girlfriend drives with a light foot so no smoke and no proper driving.

Me smoke at every change but I do that on purpose of course.

If it was bad enough to cause "jerking" you would see plumes of black smoke if the EGR is intermittently sticking. Sounds like a fueling issue to me anyway.

Newtown90

Have a 1.6 2009 Focus myself and had bad jerking issues myself when I bought it. Really pissed me off as it's majorly annoying. Googling it I had self diagnosed the DPF and EGR valve needed replacement.

The dealer couldn't seem to find the issue so took it to a different local garage guy, cleaned all connections, took it for a spin, no jerking! and 18 months later still haven't had the issue.

awec

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Special Circumstances

Delete them both, it's not like the hopelessly inadequate and outdated NCT tests will catch you on them.

awec

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Special Circumstances

awec wrote: »

Well the jerking is annoying and pretty disconcerting when you are driving so I'd like that fixed.

Though he says it won't actually cut out or die.

Sorry - I meant delete both the DPF and the EGR themselves, not the associated codes which will come back unless your problem is "rectified" permanently.

awec

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Special Circumstances

awec wrote: »

Is that legal?

I don't believe that there is ANY offence that you can be charged with as a result.

It will pass NCT.
It will use less fuel.
It will emit less CO2.
The Green Party will worship you as a Golden GOD.

What's not to like?

awec

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Robbie_G

DPF are self cleaning unless your granny driving around a town only , as you do some motor way driving and speed it will self clean so wouldnt say its that , possibly the EGR but normally would get a warning light but no harm having it cleaned anyway .
it sound more like fuel starvation , so could be fuel pump or injectors either .

Dont remove your DPF , it is illegal , there is no garntee it was pass a NCT ( i know people who failed and has to pay around €1300 to install a new one ) , it produces more CO2 and more harmfull gasses if removed .

Special Circumstances

awec wrote: »

There must be a downside, otherwise mechanics everywhere would just be stripping these things out at the first sign of trouble?

I'd like to see how many insurance claims have been voided as a result of undeclared "performance enhancing modifications".

I doubt there's many. It's them old japanese petrol cars are the problem for insurance. But you'd never know with insurance!

Robbie_G

Oh and you wont be covered in the event of a crash as it classed as a illagal modification

Special Circumstances

Robbie_G wrote: »

Dont remove your DPF , it is illegal , there is no garntee it was pass a NCT ( i know people who failed and has to pay around €1300 to install a new one ) , it produces more CO2 and more harmfull gasses if removed .

Citation needed on most of that (bar the friend story).

How exactly does it increase CO2?

What is the offence you can be charged with?

Nct is visual inspection only. They want to see something that looks like a dpf. There is NO test of diesel emissions equipment functionality.

awec

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Special Circumstances

Robbie_G wrote: »

Oh and you wont be may not be (there are no stats to suggest anyone hasn't been) covered in the event of a crash as it classed as a illagal an undeclared modification

FYP.

Special Circumstances

awec wrote: »

there was an engine malfunction warning about 2 months ago, i think the mechanic topped up the DPF fluid at that time (the DPF has fluid, right?).

The jerking started after that though, and we haven't had a malfunction warning again.

FAP fluid came before the jerking? :pac:

Yeah, your car has a colostomy bag of concentrated urine that must be topped up. No. Really.

awec

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Special Circumstances

awec wrote: »

what?

FAP FAPPITY FAP:
On many PSA models fitted with the HDi (common rail) engine it is necessary to service the particulate filter ( FAP) system every 40,000 to 50,000 miles. This will be indicated via the instrument cluster in the form of a ‘ Particulate’ system warning.

The following components make up the FAP system:

• Control module (normally located in the cabin)
• Particulate filter (part of the exhaust system)
• Fluid reservoir (Integrated in the fuel tank)
• Pump
• Injector

The FAP system was introduced on PSA vehicles back in the year 2000 when it was developed to reduce diesel particulate levels in engine emissions through filtration.

Colostomy BAG.


WEE WEE
http://www.greencarreports.com/news/1042727_adding-urea-to-clean-diesel-cars-can-i-just-pee-in-the-tank

awec

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punisher5112

awec wrote: »

Anyway, anyone think it's worth dropping into official dealer or am I wasting my time doing that?

Go to a good Indy mechanic and go from tbere.


Main dealers will be expensive.

awec

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mullingar

Robbie_G wrote: »

DPF are self cleaning unless your granny driving around a town only , as you do some motor way driving and speed it will self clean so wouldnt say its that , possibly the EGR but normally would get a warning light but no harm having it cleaned anyway .
it sound more like fuel starvation , so could be fuel pump or injectors either .

Dont remove your DPF , it is illegal , there is no garntee it was pass a NCT ( i know people who failed and has to pay around €1300 to install a new one ) , it produces more CO2 and more harmfull gasses if removed .

A DPF is just a soot filter. It does NOT reduce CO2 in anyway.

The NCT does not check for soot level or CO2 from any diesel car, it only checks the opacity (smoke level). It may do in the future, but not currently.

Special Circumstances

mullingar wrote: »

A DPF is just a soot filter. It does NOT reduce CO2 in anyway.

The NCT does not check for soot level or CO2 from any diesel car, it only checks the opacity (smoke level). It may do in the future, but not currently.

100% agree.

Even the UK, who were raising doubts about DERVs at the same time as our Green Party were incentivising them on a scale never seen before, they do not have any real emissions checks or functionality checks in place yet. And we usually lag them by at least 5-10 years.

Does anybody really think we are going to go on a solo run here and redefine how diesel emissions are checked post original certification? The most paralysed and powerless government we've seen in a while is going to upset zee germans by making it official that "Clean diesel" is a load of sheet?

:pac::pac::pac:

awec

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