Anyone fancy coming to the Barbecue

[Deanxm]

.................that im going to make out of this Audi coupe

Ok its not a citroen, or french but...................
Im having real trouble getting the running issue's sorted out and its the last job out of a very, very long line of jobs already done, dont you just love a reliable german motor .
From a cold start the engine will fire ,feels like its going to start then it doesnt and wont fire at all until its been cranked for about 10 seconds it will then start and sound like its running on 3 for a few seconds but you have to keep the throttle deppressed, if i release the throttle the revs drop and it will verge on stalling then hunt for a few times leaping from 600rpm to 1100rpm before dying.
The strange thing is no matter how long the revs are artificially maintained via the throttle for it will die in this manner when the throttle is released, even when warm, but after its stalled you can turn the key with no throttle applied in the usual way and it fires into life and idles at 900rpm as it should.
Another symptom is that when hot and its been idling a while the revs gradualy tail off (after 10 minutes or so). opening the bonnet and pushing the throttle cam hard shut will make the engine rev back up and settle at a normal idle speed again. Ive found that the TPS only senses fully open or fully closed throttle and activates a microswitch at both position, but the throttle will not close far enough under its own spring to activate it all the time. There is a screw to set the throttle idle position but the butterfly valve fully closes in the intake and so the throttle will not close anymore than it already is.

I know its a long winded one but im tearing my hair out here so any suggestions would be much appreciated.
The engine is a 2.0 four cyl sohc 16v with EFI and mechanical ignition.

D

[vince]

Hi Dean, what year is the coupe? With that engine i presume its a circa 1990 one?

Have you tried spraying carb cleaner through the throttle body assembly? as they do tend to gunge up overtime and can become sticky in operation causing all sorts of maladies.

PM me the reg of the car so i can print off the details at work on the VAG dealer programme and ask the lads in the workshop next door. They are VAG specialists and should know the cause

[Citroenmad]

BBQ sounds very good, when are you planning it?

German cars, reliable? Shame they have that reputation, as they are no better than anything else in my experience.

[Deanxm]

Vince thank you, its a 1994 coupe on an M plate based on the Audi 80, im sure its the ACE engine, ive got the VAG dealer program and it covers everything right up to current stuff in exellent detail with wiring diagrams, diagnostics, the works....but for this model?...........all you get is a heating and ventalation exploded diagram and some other useless stuff

Ive taken the throttle body off and cleaned it all out, it was rather clean anyway but its made no difference, ive done the cam belt, plugs, leads £££££, dizzy, rotor, filters and fluids on the engine side of things so its had a dogs danglies service and its still suffering with Audi leprosy

Chris, if im honest its a very average car for the time, but its boring on the handling front, a pita to work on and far too complicated for what it does, never owned my own audi but the layout of this car is enough to make me think long and hard about the Quattro ive been dreaming of

D

[Deanxm]

Hi all

After a couple of evenings facking around with this car ive sorted it out, leaking injectors!! it is now running like a dream and can be given back to its owner and taken off my drive

Thanks Vince too for all your help, much appreciated mate

D