I have a 91 audi 80 2.3 i5 I bought off a kid. It started right up with a high idle but then will not start again unless its dead cold. Upon further investigation someone adjusted the throttle plate screw all the way in to keep it from stalling as much. On a suggestion from a forum I disconnected the 2 pin coolant temp sensor and the car will start and run briefly hot or cold. If I can disconnect it, start it and run to plug it back in it will stay running. It still runs like **** and will stall in gear if I take my foot off the gas. It seems like it runs worse the hotter it gets. I have been to auto class and worked in a shop but have never worked on such a confusing nightmare of engineering that is the audi. Please let me know what the possible culprits could be. My stab in the dark is a stuck open injector (maybe cold start injector?) Or maybe a bad map/maf (I don't know what system bosch used on this vehicle.) Thanks!
Your fuel system is cis i would look at the injectors there known for that issue also the cold start solenoid can cause those types of problems but leaning towards the injectors
SOURCE: i have a audi a3
i think the problem is the injector pump ,this isnt common rail as yet for this age vehicle and when its starting its not throwing the auto start mechanism into play which makes it over inject fuel ,remember the old transit with the inline injector pump,lift bonnet pull throttle and push button in ,then it would go first time .well its the smae thing buts done electricaly ,only solution is to put car into a bosch injection specialist and have the pump overhauled ,lots of cash though,or use a can of brake and clutch cleaner --- and thin pipe into teh air intake and spray some of the cleaner into the air intake ,brake and clutch isnt as harsh as easy start andf their is a nozzle on the can so the pipe pushes onto that ,just like the old perkins diesels in the transits in the 60s only it was a plunger on the dash in them days .
SOURCE: 1997 audi a4 quattro, Got
does the check engine light come on or flash when the running issue starts? sounds like you have an ignition coil dropping out intermittenly.
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