baz-cabrio

I have found that the prob get worse on my car as the engine gets hotter, on the highway its ok, but when doing say 30 in fith gear the hestitation starts and stays for about a mile then clears only to return later. If i pull up when its hesitating the revs are about 2000 and somtimes dies. She starts fine and normally idles at 900, and is very smooth. I have checked for vac leaks and just changed the plugs for bosch super items, its now even smoother. Would the Oxy sensor cause this ? the old plugs were quite black, I also put redex in the enginebe to clear ant potential carbon build up.

I have read about faulty injector O ring seals? anyone know about this? help !!

Julian_B

It sounds like O2 sensors, next time do a search since this has been discussed many times =D

cuatrokoop

Injector o-rings, IME, cause more problems at idle than anywhere else.

A bad O2 will cause problems throughout the RPM range, as do vac. leaks.

Also, how old are your plug wires?

baz-cabrio

plug leads are the orginals. I have dowloaded a pic , how do i get the pic onto this thread?

Also, my car produced positive presssure in the fuel tank !! i have checked breathers and are clear, its almost like air is getting into the fulke and returning back to the tank???

cuatrokoop

<img src="http://pictureposter.audiworld.com/69340/v6.jpg">

This pic?

Replace the plug wires, those are likely old and no longer good!

baz-cabrio

at last i sussed the pic thing !!!
thanks for your help cuatrokoop. Do the coils go bad? i have three doubles on the top of the engine.

baz-cabrio

cuatrokoop,
nice coop, have u considered changing your hubs to allow for five stud alloys? your wheels are great but four stud choise is limited. I have ordered some fox racing evo 4 wheels as they are the closest i can find to the original audi 17" from the last cabriolets. I will order new plus leads first thing together with an oxy sensor.

cuatrokoop

Coil's really don't go bad....

cuatrokoop

Thanks...Not planning on going 5x112 yet. I've found some wheels I like that will fit a nice wide sticky tire on them for autocrossing with a 4x108 pattern. 17x8 and 17x10, take your pick ;-)