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Old 10-30-2020, 06:31 PM
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Join Date: Jan 2009
Location: Las Vegas, NV
Cobra Make, Engine: Shelby CSX4005LA, Roush 427IR
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My car had a fuel pump switch. I assume the switch controls the relay activation leg controlled by the ignition switch since it isn't designed for that much current to be in either the line or load side.

I was driving along I25 through Denver one day and the car died. I coasted to the break down lane.

Got out of the car and couldn't tell what was wrong, but found I had no fuel pressure (there was a gauge under the hood for the DFI system). Anyway, I checked the pumps but couldn't hear anything over the traffic. Then I started jiggling the fuel pump switch and I could see fuel pressure and it turned over and ran for a few seconds. What I found was that one of the f*n Lucas toggle switches had developed a flat spot. If I held the switch up just a little off the bottom I had fuel. So I jammed a toothpick under the switch toggle to hold it up and got home...

So, if you have a switch, check it!!! It could be that your relay is OK, just not getting the
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Tony
CSX4005LA

Last edited by twobjshelbys; 10-30-2020 at 07:00 PM..
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