fuel pump not turning on
fuel pump not turning on
the fuel pump is not turning on or priming. we checked the fuse, we dont think its getttin any kind of power ive been all over the search feature and nothin. wat could be the problem this is really aggrivating
-
boost_boy
- Posts: 7051
- Joined: Thu Nov 14, 2002 7:28 am
- Car: B12 sentra w/built CA18DET, B12 sentra w/fully-built CA18DET, S13 coupe w/ CA18DET, S13 hatch w/CA18DET, 2002 maxima SE
- Location: Miami, FL.
- Contact:
Re: fuel pump not turning on (zache803)
Is the ecu turning on? If you see the green and red light when you turn the ignition on, turn the screw to see if the lights begin a flashing sequence. If the lights flash, your ecu probably is n't toast yet, so the next thing to do is make sure the crank angle sensor is plugged up. If that don't fix it, physically check the pump by removing it from the tank or start probing the wires to make sure that the pump is functioning. And lastly check the relays...........zache803 wrote:the fuel pump is not turning on or priming. we checked the fuse, we dont think its getttin any kind of power ive been all over the search feature and nothin. wat could be the problem this is really aggrivating
Dee
Re: fuel pump not turning on (boost_boy)
ok thanks ill try that and keep u posted
-
campground man
- Posts: 165
- Joined: Mon Sep 24, 2007 4:32 am
- Car: 1990 Ca18det B12 Sentra
- Contact:
Re: fuel pump not turning on (zache803)
I had the exact same problem because of a short and it had fried the ECU where it powers the fuel pump. There is a relay next to your fuse box that the ECU sends a ground to in order to kick on the fuel pump.zache803 wrote:the fuel pump is not turning on or priming. we checked the fuse, we dont think its getttin any kind of power ive been all over the search feature and nothin. wat could be the problem this is really aggrivating
It's either the first or third relay (I forget) Remove the relay and test it to see if the relay is good, if it's good then put a wire jumper across the relay and see if the fuel pump kicks on. If it kicks on then it's your computer.
The relay works when the ECU grounds the wire - if you jumper it and the fuel pump kicks on then the ecu is not switching to ground.
The wire that went to my dropping resister was grounded to the metal case on the resister - if this happens it will fry the part of your ECU that controls the fuel pump...
As boostboy said there is a few things that can cause this.
Re: fuel pump not turning on (campground man)
i figured it out i feel really stupid.... the ecu wasnt completely plugged in so if it wasnt at the right angle it wouldnt come on thanks for all the help guys