forum.audiv8.com Foren English Audi V8 Forum idling problem S6 4.2 AEC

I having problem with variating idle on my S6 4.2 AEC.

i have searched info on Nordicaudi.com etc.

i have cleaned the Idle Stabilizer Valve and all hoses to the crankcase ventilation are new,also the vaccum hoses are new.

Sometimes the rpm is around 1-1200 rpm in N or P mode and sometimes it´s perfect,But if you rev the engine just a little or turn it off and on the rpm is perfect again.

i can not find any difference between hot or cold engine,do someone having any suggestion of a solution of my problem.?

Best regards Johan from sweden.

Difficult to say, could be a temperature sensor. First step would be checking all the connectors around the engine for cleanness and good contact. Then it might help to read out the faultcodes. Something intermittent could be stored.

I changed the cylinder head gaskets+ all sealings in each cylinder head and machining/milling the cylinder heads for right straigtness.

all hoses for crankshaft ventilation+all vacuum hoses are new,and it has worked fine from june until now.

I´m have my thouhgts about the lambda or temp sensor.

i have no errors in VAG com.

Are you sure that your throttle valve is absolutely closed and the idle switch is OK?

Regards

Bastian

When i changed the cylinder head gaskests i cleaned all parts around the engine accurate.

I checked the throttle yesterday and it seemes ok.

i will try to check/replace the idle switch during this week.

My problem is now solved,the solution in the end was simple,i moved the clip which holds the throttle wire 2 steps and now my problems is gone.

sometimes it´s nice with easy solutions:)