hi ive got a problem, hoping someone here can help me. i've got a 98 a6 and recently its been cutting out on me whenever its on low revs. when d car is idling the revs jump up and down and when im driving normally and then brake down to 0 the car sometimes just turns off. do u know what the proble could be, as much help as possible please...

 

not sure on the 98 a6s but i kinda had the same problem with thte idle jumping around on idle and the car often just dropping low and cutting out. i cleaned the MAF sensor, replaced teh vac lines and pulled out and cleaned the idle control valve. this really seems to have stabilized the car. the RPMs still jump around but its +/- 50 RPM instead of the stuff before. try this it may help, also i have a 12v V6 im not sure if the 30V v6 had a ICV but i know a vac line and a dirty MAF can cause these symptoms.

 

many things can cause it here is a list

[IMG]local://upfiles/12092/7D90967AF6F54CFA8AFE191C6DA2A39F.jpg[/IMG]

[IMG]local://upfiles/12092/87DA48178E8C41A6BB0EFB30B10A4626.jpg[/IMG]

 

hey avant80 so oyu have a DIY for cleaning or replacing a EGR valve on a 12v AFC motor in a 96 A4 i gotcode for a a few times, and im pretty sure thats the last thing i need to fix other than some O2 sensor to get the A4 running right.

 

a little cheat to stop the EGR forever,

find the efending item and blank it off this must be done when engine is cold and key not even turned on ( if you turn the key the system will find it ) if its blanked it will bypass it and no codes will be regitered,

its simple to clean them by unbolting the offendor and scrape the carbon off

 

http://images.google.co.uk/images?hl...ages&gbv=2
lots of help here

edit: did you know the EGR system is the cause of most problems

 

I had a 95 a6 and it had the same problem--Dirty throttle body bore and throttle control module ---I did have a 5-speed and was the 12v v6....but worth looking at

 

I have a 96 a6 avant that constantly had a cel for the low flow 'egr valve'. there is a great write up in other audi forum that i used as a guide. it worked perfectly. there was so much carbon build up the passage was completely blocked. cleaned the tb as well, car runs much better now and no cel.

saudi, do a search for egr valve and you will find my other posts with the link.

 

^^ good point ^^ egr valves and blocked pipes are listed as one of the problems