fuel problems

[BigE]

hopefully someone can help me out here, at this point in kinda lost... i parked the car for a few days, it was running fine when parked, im not gettin fuel to muh rail, old pump was good, but i replaced it and sock anyway cuz it has high miles and i already had tank out, the basic 15A fuse is good, main EFI new, pump relay is fine, the circuit opening relay is new, still no go on fuel to the rail, and pump not kickin on, i ran a solid power straight from battery to the new pump just to see if i can get it to start..still no start, if anyone knows or has had some similar problems in the past i could use the help about right now, ive done everything i can think of and still crapping out on it
thx

 

[Nick M]

Turn your key on. Put a jumper wire in the diagnostic box under the hood and between FP and B+. Report back.

 

[mk3tattoos]

Did your alarm go off when you got in, then turned off when you put the key in? Does the car crank over, or do nothing? Any mods done to the car, and what kind of fuel pump did you put in?

 

[str8_6]

okay when you gave it direct power did you give it a direct negative and positive? cuz you mentioned just positive. you could've easily just checked at the connector if you were getting voltage.

anywho, if you did that and it still didnt work then i'd say its your fuel pump. put your old one back in. i've known a friend with a 7mgte running over 300k miles and the original pump still runs like a champ. lesson to learn here, dont fix it if it aint broken.

 

[BigE]

only codes its showing is pre existing ones that i took care of while the car sat for the two days, yes pump was grounded when i tried testing it with str8 wire, not a rotating assembly problem engine spins freely, just doesnt build pressure and nothing coming to the rail, another reason i left new pump in was cuz the old one on the hot side when i tried taking the wire off the nut was locked down on it and spinning the whole stud, pump isnt getting any voltage with ignition switch on, and ive checked or replaced every piece i know to check with it, i work part-time in a parts store so i have access to pretty much any part i need at cheap cost, ive been looking for corroded or broken wires and so far everything looks sound, guess i just need to look harder lol, as i said before im kinda lost with this one

forgot the other questions, nothing crazy on the mods, just more boost and supporting mods with it.. and alarm didnt go off

 

[nosman4]

Start checking power before and after the relay. Check and see how far the power gets before it stops. If you're not getting power on the pump side of the relay, then you have to find out why the relay isn't getting triggered.

 

[BigE]

yea thats pretty much what ive started doing, along with checking to make sure no wires have been broken and such, i only have about an hour before work to check around, then im gunna have to put it off longer till monday afternoon or so and go from there..hopefully i can figure something out within the next few days and get this resolved

 

[BigE]

im not even getting power to the pump relay, only two things between that is the circuit opening and the main EFI, and the simple 15A fuse which is fine, and both EFI and circuit opening are new.. this must be payback from my car for parking it for a few days...then i try to start it up and it goes crazy...
:1zhelp:

 

[BigE]

so ive somewhat found the problem, got some free time and played with some wiring... i jumped a wire str8 from the battery to the main EFI to see what happens, everything else works perfectly when this is done, so the problem is between the 15A fuse and the main EFI..i was looking in the wiring diagram to see exactly where it goes, but it isnt very helpful..not sure exactly what i should look for to replace, lookin at the harness it goes str8 into the fender from the wire i jumped from out of the fuse box, trying to find a better wiring diagram online to get a better idea of the new wire i need to run and where exactly it goes