#1 |
Intermittent problem... started a few days ago. Car would not start, noticed no priming on the fuel pump when key turned to run position... no fuel pressure. Next day started fine when the weather was warmer. Later that night, no FP prime or fuel pressure. Next day when warmer it was fine.
What I've done so far...
When I changed the negative battery cable to an NOS Lincoln cable I had when I first got the car, the fuel pump wouldn't run when the key was turned to run and the car wouldn't start. Changed back to the old cable and car ran fine for months. Finally tested the new battery cable, couldn't find any problems, and swapped it out a month or two ago (old cable was very corroded). Car ran fine until recently.
The ignition switch was replaced within 6 months and seems to be working fine. When the key is put in the run position, the abs pump motor runs and the autoride relays/switches all seem to be working normally as well as the dash lites (check engine etc...) just no fuel pump prime.
I was pretty sure the problem was in the connector running off the negative battery cable from the experience I had when I swapped cables before. I could unplug it and plug it back in and sometimes replicate the problem of the pump not running the prime cycle when the key is placed to run. Figured I would just bypass the connection and wire the two grounds up directly.
Well... fuel pump will not run now. I need to trace this a little further down the circuit but I am not sure where to look...
I did wiggle check the IRCM connections... I'm sure it's a bad/marginal ground somewhere... but where is the question!
What I've done so far...
When I changed the negative battery cable to an NOS Lincoln cable I had when I first got the car, the fuel pump wouldn't run when the key was turned to run and the car wouldn't start. Changed back to the old cable and car ran fine for months. Finally tested the new battery cable, couldn't find any problems, and swapped it out a month or two ago (old cable was very corroded). Car ran fine until recently.
The ignition switch was replaced within 6 months and seems to be working fine. When the key is put in the run position, the abs pump motor runs and the autoride relays/switches all seem to be working normally as well as the dash lites (check engine etc...) just no fuel pump prime.
I was pretty sure the problem was in the connector running off the negative battery cable from the experience I had when I swapped cables before. I could unplug it and plug it back in and sometimes replicate the problem of the pump not running the prime cycle when the key is placed to run. Figured I would just bypass the connection and wire the two grounds up directly.
Well... fuel pump will not run now. I need to trace this a little further down the circuit but I am not sure where to look...
I did wiggle check the IRCM connections... I'm sure it's a bad/marginal ground somewhere... but where is the question!
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1996 Impala SS, DCM, Borla Cat Back, too much other stuff!!! (SOLD)
2009 Pontiac G8 GXP 6M, 6.2l LS3, Kooks Long Tube, Hi Flo Cats, Mild Cam