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Discussion Starter · #1 ·
I have an 00 lightning with a fresh build. When it starts, it runs for 10 seconds, then shuts off. Found out that the voltage is being cut off to the pumps. It starts high, but quickly drops to zero, shutting off the pumps. What am i missing? the dyno guys got it to run by connecting a relay directly to the pumps. where is this box that operats the factory voltage??? why is it dropping voltage??
 

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Discussion Starter · #3 ·
ive just changed the motor. is there anything I should look at? i did upsize the pumps to 2 walboro 255's.
ANY THOUGHTS GUYS? IS THE FACTORY SYSTEM NOT GOOD ENOUGH???
is there anything i should do with the sensor under the intake??
 

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check the fuel pump voltage dropping resistor...its mounted atop the IC pump down behind the bumper.
 
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