How do I check the fuel pump voltage? The junction block shows over 14 volts while running at all connections.
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Download the service manual set for your vehicle from the links in the Sticky section of the Engine forum, right here.I am not a mechanic I do not know the location/color of the wires.
I don't know on Vortec vehicles. I suppose I'll find out next summer when I will--likely--be dicking with the fuel pump on my '97 K2500.What wire do I check from the harness going to the pump? Where is the ground?
DO NOT STAB VEHICLE WIRING, ever. The last thing you need is pierced insulation letting-in road splash to corrode the copper wire inside.How far into the sheathing do I have to stab the probe?
Fairly common. Electrical "stuff" is often difficult for folks that don't have a "Math" background, NOT because of the actual mathematics of electrical circuitry (of which there is plenty--but also mostly not applicable to a system that's already been engineered and in-use) but because both math and electrical diagnosis (vehicle diagnosis in general) are heavily dependent on logic, and logical thinking is not common in our society.I am very mechanically inclined, but about completely out of my element with electrical stuff.
check fuel pressure, you're going to need to buy an adapter as TBI doesn't have a Schraeder valve like modern EFI. this is a must with a TBI vehicle. you want 13 psi, you can modify your stock regulator to obtain this.
did you fabricate a block off plate for EGR?
do you know 100% the distributor has been replaced? i went through 3 reman distributors on a GMT400 i did work on a few years ago. i finally gave up and rebuilt the original and it finally ran right.