Umm! trouble with Idleing

[speedy gonzales]

If it stalls or cuts out then maybe you need to check the coil pack and leads?

Speedy G

[Deefadog]

Mines used to do that too, although it's a 16V it was just the mixture needed setting right - have you checked yours?

[speedy gonzales]

Guys, i know its been some time but i have been mega busy (as a doctor you know....saving peoples lives and SH!T)

had a brief look under the bonnet with regards to the idleing problem and realised that if i disconnect the blue temp sender lead, the car revs perfectly at 100rpms!  Does that mean that i have finally found the problem?  Shall i order a new temp sender and stick it on?

Remember, my car was fine before i decided to change the R-Cover Gasket, and when i put it all together, there was one problem after another.  I also found that the rubber bung (on top of the rocker cover) was also broken (split) again!!!

What's your opinion? Blue temp sender at fault?

[rubjonny]

If it makes a diff then it suggests the sender is working, you might have to set up the base idle & CO again.  Its worth replacing anyway as its cheap

[richandhazel]

Well worth changing the temp sensor and relatively cheap too. You can test it:-

http://volkswagen.msk.ru/vw_doc/eva2/FU01/ch7.2.1.html

[richandhazel]

If that doesn't fix it it is well worth cleaning the ISV and checking the throttle body switches as previously mentioned:-

http://volkswagen.msk.ru/vw_doc/eva2/FU01/ch7.3.2.html

http://www.20v.org/engprob.htm#isv

http://volkswagen.msk.ru/vw_doc/eva2/FU01/ch7.3.3.html

[rubjonny]

And reset the base idle & CO:
http://volkswagen.msk.ru/vw_doc/eva2/FU01/ch7.6.html

Especially if you have fixed an air leak

[Mk2Kezza]

Believe or not, I've recently changed my Rocker cover gasket and she's running like a dog!! Doesn't want to idle after startup and occasionally but not always, have random revs - up to 2 or 3000! Pain in the arse!
I think that it would be a good idea to clean the ISV etc, but a quick check of this blue temp sender may cure my blues!!!

[rubjonny]

sounds like you've cured an air leak so need to reset the CO & idle as above.  Do the blue temp sender 1st & check any wiring around that area you might have disturbed, and that the oil filler cap is on properly (yes I've done this before!)

[speedy gonzales]

Guys, I really appreciate your help (esp the web links!).

Will get under the bonnet on saturday and report back what I found.

Thanks again.

Speedy