Low voltage to fuel pump

[Lake_Bueller]

This is a continuation of my random "no start" thread...

Took a little time out of "working from home" to look at the G4 again. It started last weekend but nothing again this weekend. So I decided to dig a little deeper. What I found was that the fuel pump was not cycling on.

Accessed the fuel pump and pulled the line. Crank and no fuel from the pump.

Tested the voltage at the plug and only got 5v.

Ran a jumper plug to the fuel pump and got pressure.

So where do I go next with the low voltage?

Thanks!!

 

[4Runner]

Try changing the fuel pump relay with a spare and test your voltage again. That’s the next easiest thing to check.

 

[eburrows]

Also check the fuse, and grounding for the pump. If it's the positive wire that's bad, due to a break or corrosion, you might have to string a new one.

 

[discostew]

Measure the voltage at other places in the circuit and see where your loosing that 7 v. Easy place to check is the inertia switch.