My truck just died one morning as I was warming it up. And since then it will turn over but not start. I have already replaced the TIPM thinking that the fuel pump relay was bad because I was only getting 10 volts at the fuel pump. After replacing the TIPM still no start and still only getting 10 volts at the pump. When I turn in the ignition I don’t hear the fuel pump turning on. I cleaned up the ground wire for the TIPM and gained half a volt at the pump.

Is less than 11 volts at the fuel pump enough to power the pump?

Is my wiring just shot and I have to track down a bad ground?

Or should I just replace the fuel pump and hope and prayer?

PS my wife is getting tired of driving me around and need to fix this quick before I’m in more trouble.

 

Get a fuel pressure gauge, see what it has to say.

Are you getting spark?

 

I’m getting spark.

But should I at let be hearing a hum when I turn on the ignition but not start it?

 

Pump should run for 3 seconds or so at initial key on. If it doesn't, need to find out why.

 

What is the voltage at the battery? You shouldn't see much voltage drop at the pump.