1999 bonneville, 3.8, fuel pump circuit problems
I.m somewhat familiar with checking out engine electrical systems but I may be using the wrong fuel pump wiring info. here'* a summary and the background of the problem.
99 bonneville, 3.8, starts and dies, fuel pump relay operates before and during immediate start up, pressure at Schrader valve, Removed relay, jumped the pump feed and supply recepticals, engine starts and runs well. OK, the system that runs pump after start up is flawed.
I used the only available wiring diagram, it for a 1998 bonneville, ( maybe not a good idea,) I saw that an oil pressure sensor bypassed the relay,cool, made sense, it'* the wiring to the sensor or the sensor. I never just throw parts at a problem, but I stupidly put a sensor in without electrically checking the wiring or connections. The engine did run for 8 minutes
and died. I thought I inadvertantly caused a bad connection to temporarily make contact. That'* as far as I've gone so far.
But now I am looking at a 1999 diagram which does NOT show a oil pressure bypass circuit. Was I barking up the wrong tree? Does The PCM keep the relay actuated after start up via a crank sensor signal??
I would appreciate any info you may have regarding diagnoses of this problem
Thank You Peter