Hello all, newbie here with a Quattro v8 problem. When the car is hot, it will not start, it will crank, with no spark or fuel though, sometimes at highway speeds, it will cut out, no power to the engine, then it restarts itself, if I am going slow when it cuts out, it just dies and will not start until it is cool. At first I thought it was a crank sensor, then I found out I have distributor's. Any help would be great! Also the tach only works when it wants to, doesn't seem to correspond to the dying though.....

Thank you in advance!

Andy

 

my tach has been doing something like that too, its jsut a matter of the sensor being kind of lose because the tach in the 88-93 were done mechanically and not through the ECU,

As for your other issue, there is a guy with an Audi 80 thats been having the same problem, id reccomend going there, i think they worked out a solution,
Im pretty sure its called audi 80 idle problem im frustrated

 

Thank you, mine is a little different though, mine idles fine, as long as it starts....

 

not sure if audis are the same but i had a vauxhall astra sri that when it was hot and i turned itoff and went into a shop and came out or got petrol for example would not start for up to 10 minutes. afternearly loosing my head with it someone told me that the same relay controls the fuel pump solinoid and the spark on the spark plugs and it was going open circiut wen it got hot. if that help tho i not sure if the ralays are the same in the two cars. good luck.

 

Thank you! I will check that out.
Anyone now if it is the same relay, or have any other ideas, I love this car but it is driving me nuts.
If I can't figure it out soon, I may have to sell it, I hate to do that because it is a nice car.


Andy

 

My experience with failing fuel pumps mirrors your problem in some ways. Old pumps will short out internally when hot enough and fail. They work fine when cool. In my case fifteen minutes of driving with half a tank of gas or less would make the fuel pump hot enough to fail. A tell tale symptom is fuel pump noise. If you hear a loud sizzling noise from under the car ( the pupm is under the right floorpan ) suspect your fuel pump is failing.

 

I thought of that, but I thought the pump was in the tank?