Egr Valve On A Mk2 Tdi 115

[sotal]

Hi,

 

Most cars I've had, I've blocked off the EGR Valve which has given much better running etc, and I've never had a problem but I've heard that on the PD engine it can cause the Workshop light to come on,

 

Has anyone blocked it off on a PD engine? Did it cause any problems?

 

I've also had different ways of doing it on different cars I've had, on the Discovery I had you bought a plate, on ford zetec engines you just removed the pipe from the top of the EGR valve - pushed a ball bearing up it and replaced the pipe.

 

Can the simple method (as per the zetec) be used on the PD engine?

 

Is it worth doing?

 

I've got to admit I have no problems to fix wheras every other car had symptoms like jerkyness when cruising, so I was blanking off to fix a problem - I just thought it may be better to prevent the problem first?

[roy202]

Hi if things are working ok why mess about with them, the pd engine is a good engine, if you want to speed it up a bit why not try this

 

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=200418387005&ssPageName=ADME:X:AAQ:GB:1123

 

ive not tried it but basically it works by altering the signal between the ECU and fuel temperature sensor. The ECU thinks that the temperature of the diesel is hotter than it actually is (88deg c) and adjusts the fuelling/boost and injection timing parameters

 

let us know how you get on........

[sotal]

Hi if things are working ok why mess about with them, the pd engine is a good engine, if you want to speed it up a bit why not try this

 

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=200418387005&ssPageName=ADME:X:AAQ:GB:1123

 

ive not tried it but basically it works by altering the signal between the ECU and fuel temperature sensor. The ECU thinks that the temperature of the diesel is hotter than it actually is (88deg c) and adjusts the fuelling/boost and injection timing parameters

 

let us know how you get on........

 

 

I don't want to speed it up, it's a family car and goes more than fast enough. What I've found with other cars is that the EGR Valve is a dirty device which leads to other parts getting caked in rubbish and can cause problems. On the other cars I've been too late really and the damage has been done, so bits need cleaning out and the EGR blocking off. They're a dirty device which puts dirty air back into the system to have a second go at burning off the nastys rather than pumping them outside, they were an after thought to meet emmissions requirements - but they only run on overrun so they're not tested during the MOT etc. They're not used on many new engine designs.

 

I wouldn't touch one of those ebay devices, it'll just be a 1p resistor and won't do the engine any good

[roy202]

I agree i wouldnt put one on my car but they seem to sell alot of them. Mainly to boy racers i expect.

The reason the egr valves are not on all the newer engines is because they dont produce all the nitrogen oxides that the older engines do.

[ncb]

Yes. I have a mk2 52 plate and have just plugged the vacuum hose going to the egr valve (ford zetec ,method). No engine lights so far after a year.

 

I beleive egr's are probablt good for up to 50k miles. After this as they start to clog up, they cause more problems than they solve. This is ok for manufactures as they dont want you driving any car past its warranty anyway.

[chrispb123456]

Yes. I have a mk2 52 plate and have just plugged the vacuum hose going to the egr valve (ford zetec ,method). No engine lights so far after a year.

 

I beleive egr's are probablt good for up to 50k miles. After this as they start to clog up, they cause more problems than they solve. This is ok for manufactures as they dont want you driving any car past its warranty anyway.

Yes its OK blanking off the pipe, but have you cleaned the crud out of the valve.

The incoming air still has to pass through the valve even though you stopped the valve operating.

[Willie Krashitt]

Hi All,

 

Firstly, yes you can blank off the EGR valve and it won't damage anything or put on any lights. It will make the engine a little noisier though. Chris's point is valid though, as if not used the sludge can dry out and flake off as bigger bits.

However, I would like to clear up a couple of things from some of the previous answers.

 

1/ but they only run on overrun .

With increasing emissions legislation, EGR valves have gone from being simple vacuum controlled devices to elecrtonic stepper motor controlled ones. Their range of operation is definately NOT just on the overun. They will be operational up to about 60% throttle and 3000rpm, depending on the vehicle and emission standards being met, certainly they will be operational throughout the emission drive cycle that leads to the published fuel economy numbers. As a general rule, the heavier the vehicle, the harder the engine has to work and the more EGR is required.

 

2/ The reason the egr valves are not on all the newer engines is because they dont produce all the nitrogen oxides that the older engines do

 

Some of the very latest vehicles/engines with "selective catalytic reduction" (SCR)emissions control may be able to meet emissions without EGR, but there won't be many. EGR'r primary function is to reduce nitrous oxide emissions by making the burning process slower and therefore not as hot. Mk 2 Galaxy was certified at Stage 3 emissions, All new cars are now Stage 5 and everyone is working on Stage 6. With each level, smoke and NOx emission limits have been cut drastically, and is one of the reasons why fuel economy has suffered as things like gear ratios, compression ratios and fuel have changed to enable manufacturers to meet these limits.

 

George.

[zorgman]

blank it or plug it ive ran mine for 3 yrs no problems at all, giz your

[Sher]

Well I plugged it, Engine ticks over better,accelerates better, fuel economy is up back to normal perhaps better,but it seems to be suffering some juddering problems between 1500-2000revs after decelerating then accelerating. The power take up is not smooth feels like turbo lag.

 

Seems I will have to try lifting the rocker cover and tightening the wiring for the injection system.

[Sher]

I notice zorgman's is a 110bhp motor.

 

Mine is 2002 1,9TDi 115bhp Ghia 117,000 miles.

 

I presume the vacuum also controls the variable vanes on the turbo. With a complete block in the pipe the driveability became very poor.

 

I had first used some tape which may have allowed some leakage of air into the vacuum pipe. So today I used a taper headed machine screw to partially block the vacuum pipe and covered it with a (non flammable)improvised filter.

 

Under test (5 miles) it seemed to perform well, lumpy tickover seems to have gone and the economy was back.

 

 

Question:-

 

Does the Vacuum for EGR operate at tickover on this model? I notice there was quite a build up of suction at idle using my thumb to cover the vacuum pipe. (Pity I don't have a vacuum gauge available to measure it.)

 

Can anyone confirm that vacuum and hence EGR is applied at tickover?

 

If there is not meant to be any vacuum then this will indicate the Vacuum control Valve is faulty.

[zorgman]

norm on the over run when it opens, if its running well now and doing all the right things its sorted, it was the pipe on the egr valve itself you blocked off as it shouldnt affect the turbo at all