Fuel Pressure Reading
Thread Starter
Advanced
Joined: May 2005
Posts: 54
Likes: 1
Fuel Pressure Reading
I have read various posts and found the proper readings for the fuel pressure, but not the indications the gauge just indicate. My 87 when hot, is starting hard and stalling. I checked the fuel pressure and found the pressure at key on to be 45#, but when I start it the pressure becomes severely erratic. It jumps between 47 and 15 almost like a burnt intake valve does on a vacuum gauge.
I originally had a code 36 from the ECM. I conducted the flow chart tests and found nothing wrong with those ckt’s and the code has since disappeared.
Any help would be much appreciated!
I originally had a code 36 from the ECM. I conducted the flow chart tests and found nothing wrong with those ckt’s and the code has since disappeared.
Any help would be much appreciated!
Safety Car
Joined: Feb 2002
Posts: 4,212
Likes: 10
From: Sun City West Az
Have you done the "key on, engine off" test on the fuel problem? If not, prime fuel system then pinch off supply line @ the fuel tank. If the pressure doesn't fall then the problem is in the pump / check valve.
