Uneven Running At Low Speeds?

[galaxy]

Hi, I wonder if anyone out there has come across this issue?

My MK2 (2000) Galaxy TDI (90BHP) is running uneven from cold. It feels hesitant and slightly erratic at very low revs and especially when cold. Once it's warmed up, its not as bad, however it's very easy to stall at low revs and sometimes hunts on tick over.

There is plenty of power in the car (well... all 90BHP of it) during acceleration and it doesn't appear to be uneven at higher speeds. If you slow down to low revs (say 30MPH in 4th gear) rather than smoothly labour it starts to jitter - if you throw down the accelerator it jumps a little and then picks up under the turbo.

I replaced the MAF some time ago and this problem was there before, so I'm sure its not the usual affair... I've heard a few people say that it may point to the EGR valve being dirty/ faulty.... any thoughts welcomed.

Thanks :-)

[galaxy]

Just noticed some great info on EGR valve cleaning.... looks like the way to go, i'll keep you posted. Thanks anyway.

[zorgman]

totaly removed my egr all blanked off, check actuator is free and working, its at back of engine all the vac pipes are black cotton covered so easy to spot

[justin36]

hi, did you sort your problem out as it sounds similar to the problem i've had i would be very interested to find out.

[galaxy]

hi, did you sort your problem out as it sounds similar to the problem i've had i would be very interested to find out.

 

I did a bit of digging on this excellent site and found all of the answers... I started with disconnecting the EGR pipe and blocking it off with a 6mm bolt. All of the problems were instantly removed!!! So the EGR valve is obviously faulty. I may get round to changing it at some stage, but it sounds like I should be able to run with it like this permanently without any major issues.

 

I was amazed what difference it made.

 

A point to note are the symptoms, low speed jitter and a weak pull off. Other than that the car would run fine at higher speeds. If it's still a power problem, then check out the other links... turbos, MAF or TMAP... it will be one of those most likely.

Thanks all.