Re: 1991 V3500 Project Heavy Hauler
Alright here's a fun trouble shooting question. So the first time I turned the key to the run position this morning (to troubleshoot an inop SES light) the fuel pump primed, but instead of turning off after a couple seconds the tone turned lower and it kept running. I wouldn't have thought twice about it but then I started getting a whisp of smoke and hot electrical smell from behind the dash. Shut the key off and now everything is fine and I can't duplicate the problem. Oh and the SES light just needed the tabs bent out a little to contact the printed circuit better.
It did the same thing the first time I turned the key after hooking the battery on the first time, but not to the point of smoking. I fumbled around some and eventually convinced myself that it was just the new smell of the vintage air having air pushed through it. That obviously wasn't the case. I'm going to check grounds around the pcm and fuel pump relay. Anyone had issues with the stock wiring not handling the increased load of these hotter pumps? I'm hoping if I let it sit a while I can duplicate the condition.
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