I was trying to diagnose why my reverse light weren't coming on. I later realized the car was rear ended at some point in its life and the reverse light wiring was cut. I then went on to splice them back. The mistake I made was when I was setting the wire back. I had the copper wiring exposed and it hit one of the bolts and caused a spark.
The reverse light wiring merges with the fuel pump wiring. Now when try to start, the fuel pump doesn't prime. I looked at the fuel pump relay behind the trans ecu, it doesn't click.
Car ran just fine prior to this, I know the pump is good.
Could it be a bad ground? What did mess up?
Any help would be greatly appreciated
- Don
No power to fuel pump?
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J30tChumpCar
- Posts: 487
- Joined: Sat Jan 23, 2010 1:34 pm
- Car: 1995 J30t Totaled @ Charlotte motor speedway
1994 J30 gutted caged road racer Now with VH45DE!
1966 Chevy Corvair V8 mid-ship conversion - Location: WPB Fl.
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Re: No power to fuel pump?
Fuses! check both fuse panels.
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donanabolics
- Posts: 3
- Joined: Sat Sep 15, 2012 10:22 am
- Car: 1997 J30
Re: No power to fuel pump?
I checked all fuses relays....ran the fuel pump direct, works fine. The only thing I can come up with is, it's either the fuel pump modulator or the drop resistor which I doubt because its just for voltage. At this point I will be bypassing the fuel modulator. i have bought a toggle switch and just run some wires. Hope this works, I will post an update later today.
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donanabolics
- Posts: 3
- Joined: Sat Sep 15, 2012 10:22 am
- Car: 1997 J30
Re: No power to fuel pump?
J30 is running! No more fuel modulator or drop resistor.
I didn't use the switch setup because it would be nearly impossible to run the wires through the engine firewall.
I just did some splicing of the wires, that connect to the fuel pump. Black and red wire that I bought. Ran it through. pulled through side bolster of back seat, then tearing off side panel near both passenger doors.
I then pulled the wire through the vent looking things near heater core that go through from passenger to drivers side. And ultimately splice to the ignition wires. I now some will say its not "technically right" but its not a big deal. The fuel pressure regulator is doing its job and sending the extra fuel to the return line. no bogging down after high revs. Very happy with the results.
Hopefully this will be useful to others with this sort of problem. As it is, parts like the fuel mod are rare and expensive for our j30's.
I didn't use the switch setup because it would be nearly impossible to run the wires through the engine firewall.
I just did some splicing of the wires, that connect to the fuel pump. Black and red wire that I bought. Ran it through. pulled through side bolster of back seat, then tearing off side panel near both passenger doors.
I then pulled the wire through the vent looking things near heater core that go through from passenger to drivers side. And ultimately splice to the ignition wires. I now some will say its not "technically right" but its not a big deal. The fuel pressure regulator is doing its job and sending the extra fuel to the return line. no bogging down after high revs. Very happy with the results.
Hopefully this will be useful to others with this sort of problem. As it is, parts like the fuel mod are rare and expensive for our j30's.