zoofs4

I was wondering if anyone could give me the fuel pressure specs for our cars.

I am having similar symptoms to bluevr6, Ihave replaced the crank sensor and now instead of just cutting out it just misses under load (boost).

I rewired all the coils due to brittle wiring because it needed to be done and I wanted to eliminate that as a possible issue. It didn't help.

While I was in there I pulled the plugs and they were a rust orange color. I am beginning to think it may be a fuel pump dying or a regulator.

quattro20v

at 0 psi boost, you should be seeing 58 psi fuel pressure.

5 - 63 psi
10 - 68 psi
15 - 73 psi
20 - 78 psi
25 - 83 psi

I did this test 2 summers ago and found that if I relayed the fuel pump, the pressure increased.

Also, if your pump is original, it may not be up to the task. The fuel press regulator is easy to replace and fairly cheap so its worth doing.

quattro20v

<center><img src="http://pictureposter.audiworld.com/52091/fueltester001.jpg"></center><p>I used a compressor connected to the FPR to simulate boost.

You will need to jump the fuel pump circuit by connecting 12v to the fuse located on the driver side panel.

UrS4boy

Have a switch in the line and jump from the+ post on the cowl to the right side of fuse holder#17.