1990 jeep yj 2.5L TBI
For some reason my fuel pumps keep going out....
I think my wiring might be bad that goes to the pump where the two connectors meet.
My question is can I cut the old connectors out and splice in a new weather pack connector? also where is the pump grounded to? im lost I cant figure this out.
How do you know the fuel pumps are going out instead of the fuel pressure regulator malfunctioning? What are the symptoms? blowing fuses or don't hear the fuel pump turn on with the ignition key? something else?
where the pump wires connect to the wires that run along the frame or whatever there is electrical tape holding it together, there is a weird humming, whining noise coming from the tank. fuses are fine, I can hear the pump turn on when the ignition is turned on. Wheer is the fuel pressure regulator?
haha electrical tape is never a good sign. I'm not sure about the humming sound, the pump should make some noise though.
If you can get to autozone, borrow their fuel pressure gauge. It's free to borrow but you have to leave a deposit. It just plugs into the shrader valve on your fuel rail. This will at least let you know if the pump is bringing you up to the proper pressure. Should be 31-32 psi at idle.
Does the jeep run rough/sputter or not start at all? Also, I assume you replaced the fuel filter with the new pump?
ah yeah. get the pressure gauge from autozone so you can run a couple more tests, should take about 10 minutes.
With the pressure gauge plugged in turn the ignition to on but don't start the jeep. Let us know what the pressure is. Then start the jeep and let it idle, let us know what this pressure is. Next pull the vacuum line off from the fuel pressure regulator, let us know what the pressure is. Reconnect the vacuum line, let us know the pressure. Then turn the jeep off and wait for 30 minutes, let us know what this pressure is. Next turn the jeep back on and get the pressure at high rpms.
It may really be an electrical issue causing the pumps to fail, but I wouldn't keep putting pumps in until checking the fuel pressure. If there is good pressure, then something else is causing rough running. There are a lot of possible causes for those symptoms.
First off I would find out what is under the tape and verify that plug is good or change it out like you mentioned. The pump ground is on the parking brake frame. Low power can make a brand new pump turn, but get a little wear on the brushes and you can have issues. It can also arc brushes causing failure.
86/00 CJ7 Laredo, 33x9.5 BFG AT's, 'glass nose to tail in '00, 'New' frame,wires and plumbing in '09. Carter BBD Carbed 4.0 HO in '10.
89 YJ Renegade. BBD Carbed 4.0 HO. Locked front and rear with 33x9.5 BFG AT's
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