Audi S2 91 3b - over fuel/stalling - HELP :)

[_Denner_]

Hi
I dont know where to write and ask about my s2 3b,

Dennis
Denmark

[s2driveruk]

go ahead...whats the issue

[_Denner_]

I have a Audi s2 3b 1991, i have just had the engine & transmission out
and then in again, and now it gets too much fuel, and when i speed up the engine and let i go down to idle, the engine stops, and if i keep it at ex. 3000 rpm it misfires, i have put in new spark plugs, changed the coolent temp sensor, changed intake air temp sensor, the timing is correct, and the injectors has been cleaned and testet by a firm.
The engine ran just fine before i took it out, i took it out to renovate the engine and change transmission and clutch.
Have i put something wrong back together or....
I hope that some of you may have some suggestions to what the
problem could be..

Thanks

Dennis
Denmark

[s2driveruk]

hold tight, plenty of tech advice coming I'm sure, i've changed the title of the thread to help it get seen

[mike74]

I'd do a boost leak test first and foremost. Sounds like its sprung a leak somewhere

[mike74]

oh, and any fault codes stored?

[_Denner_]

s2driveruk perfect thanks

mike74 nope no fault codes stored

[mcandmar]

Are you sure your firing order is right, i.e. have you got the spark plug leads the right way around?

[_Denner_]

mcandmar : yes its not that kind of missfire
my mind is on the injectors , maybe they could not handle the detergent cleaned them with, and the reason i got them cleaned was becuse of to old fuel so it would not start, but it startet up after they where cleaned

[_Denner_]

by the way sorry for my poor English, i try not to use google translate too much

[newsh]

Check the pipes of the PCV system are correctly connected. If you swap two pipes over you can get all sorts of problems.
And yes, do a boost leak test.
And check the Diverter valve diaphragm is not split

[_Denner_]

newsh : Thanks i will try that

[vr6peter]

Hi.

When you overfuel try a pressure test at the fuel rail.
May be you need a new fuel pressure regulator.

Cheers
Peter

[_Denner_]

vr6peter : fuel press is just about 3 bar