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Ok, about a year ago give or take a few months i replaced the fuel pump on my car. It is a name brand racing fuel pump…cant quite remember the name though…sorry. Anyway, I used dielectric grease in the pumps electric connector and i believe the grease is causing the pump issues. whatever is happening broke the solder on the main relay several times and it shot the pump fuse one time. If i drive an hour distance and stop it wont start for a while. But if i keep driving and don’t stop i can go as long as i like and it wont quit on me. All i get from the pump is some slight hesitating on long distance trips…Its quite boggling to me…I just don’t know if dielectric grease can block correct electric flow from the main relay to the pump or if the pump is the culprit..After all is said and done should i use a conductive grease rather than dielectric? ANY HELP will be GREATLY appreciated…GREATLY!!!
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Unless the connector pins have extreme slop/play, I can not see how using dielectric grease would or should cause any issues.
I would be more likely to be looking at a faulty connection, that being power / ground / signal.
Another possibility:
The fuel pump.
Is it a direct replacement for the OEM?
It may have different power requirements that the factory unit.
You may also have a faulty pump or perhaps a blockage on the pickup causing higher current draw.I had kinda similar issues with my 91. On hot days I would not get a start, in cool mornings/nights I could get a start.
My issues was that the main relay had hairline cracks in the solder, and was not switching on the fuel pump. I used a big-ish soldering gun for plumbing, and reflowed the joints with some new solder. This was .. 8 years ago, and still going. I could have replaced the main relay, but IIRC, it was $75 + tax.
As to your issue, it sounds like a shorted wire(s), or bad connection at the relay, fuel pump, or wire(s) in between.
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