At Fixya.com, our trusted experts are meticulously vetted and possess extensive experience in their respective fields. Backed by a community of knowledgeable professionals, our platform ensures that the solutions provided are thoroughly researched and validated.
I have an 87 Jeep cherokee 4.0L. The fuel pump quit working so I tried replacing the fuel pump relay first. This did not work so I replaced the fuel pump. When I tried to start the jeep I did not hear any power going to the pump & it still will not work. What do you think is the problem? What should I try next?
Re: I have an 87 Jeep cherokee 4.0L. The fuel pump quit...
Check to see if you have current at the pump conections when you turn your key to on, if not check if relay is working fine , but before all this, check for blown fuse !!
The combination Fuel Filter/Fuel Pressure Regulator is located on the fuel pump module. The fuel pump module is located on top of fuel tank.
The filter/regulator may be removed without removing fuel pump module although fuel tank must be removed.
REMOVAL
Remove fuel tank. Refer to Fuel Tank Removal/Installation.
Clean area around filter/regulator.
Disconnect fuel line at filter/regulator. Refer to Quick-Connect Fittings for procedures.
Remove retainer clamp from top of filter/regulator. Clamp snaps to tabs on pump module. Discard old clamp.
Pry filter/regulator from top of pump module with 2 screwdrivers. Unit is snapped into module
Discard gasket below filter/regulator.
Before discarding filter/regulator assembly, inspect assembly to verify that O-rings are intact. If the smallest of the two O-rings can not be found on bottom of filter/regulator, it may be necessary to remove it from the fuel inlet passage in fuel pump module.
INSTALLATION
Clean recessed area in pump module where filter/regulator is to be installed.
Obtain new filter/regulator (two new O-rings should already be installed)
Apply a small amount of clean engine oil to O-rings. Do not install O-rings separately into fuel pump module. They will be damaged when installing filter/regulator.
Install new gasket to top of fuel pump module.
Press new filter/regulator into top of pump module until it snaps into position (a positive click must be heard or felt).
The arrow molded into top of fuel pump module should be pointed towards front of vehicle (12 O'clock position).
Rotate filter/regulator until fuel supply tube (fitting) is pointed towards front of vehicle (12 O'clock position).
Install new retainer clamp (clamp snaps over top of filter/regulator and locks to flanges on pump module).
Connect fuel line at filter/regulator. Refer to Quick-Connect Fittings for procedures.
Install fuel tank. Refer to Fuel Tank Removal/Installation.
WARNING: THE FUEL SYSTEM IS UNDER CONSTANT FUEL PRESSURE EVEN WITH THE ENGINE OFF. THIS PRESSURE MUST BE RELEASED BEFORE SERVICING FUEL TANK .
Two different procedures may be used to drain fuel tank (lowering tank or using DRB scan tool).
The quickest draining procedure involves lowering the fuel tank.
As an alternative procedure, the electric fuel pump may be activated allowing tank to be drained at fuel rail connection. Refer to DRB scan tool for fuel pump activation procedures. Before disconnecting fuel line at fuel rail, release fuel pressure. Refer to the Fuel System Pressure Release Procedure for procedures. Attach end of special test hose tool number 6541, 6539, 6631 or 6923 at fuel rail disconnection (tool number will depend on model and/or engine application). Position opposite end of this hose tool to an approved gasoline draining station. Activate fuel pump and drain tank until empty.
If electric fuel pump is not operating, tank must be lowered for fuel draining. Refer to following procedures.
FUEL TANK REMOVAL
Disconnect negative battery cable at battery.
Release fuel system pressure. Refer to the Fuel System Pressure Release.
Raise and support vehicle.
If Equipped: Remove fuel tank skid plate.
Remove 4 fuel hose shield mounting bolts and remove fuel hose shield from body.
Remove fuel tank fill hose and vent hose clamps at fuel tank filler tube. Remove both hoses at fuel filler tube.
Remove exhaust tailpipe heat shield mounting bolts and remove shield. CAUTION: To protect fuel tank from exhaust heat, this shield must reinstalled after tank installation.
Place a hydraulic jack to bottom of fuel tank. WARNING: PLACE A SHOP TOWEL AROUND FUEL LINES TO CATCH ANY EXCESS FUEL .
Disconnect fuel supply line from fuel extension line near front of fuel tank. Refer to Fuel Tubes/Lines/Hoses and Clamps. Also refer to Quick-Connect Fittings for procedures.
Disconnect EVAP canister vent line near front of tank.
Disconnect fuel pump module electrical connector (pigtail harness) near front of tank. Harness connector is clipped to body.
Remove two fuel tank strap nuts. Position both tank support straps away from tank.
Carefully lower right side of tank while feeding both fuel hoses through access hole in body. Fuel Tank Full And Not Drained Using DRB Scan Tool: To prevent fuel loss through hoses, keep left side of tank higher than right side while lowering. Do not allow hose openings to drop lower than top of tank.
Continue lowering tank until clear of vehicle. Place tank on floor with left side (hose side) higher than right side
Drain tank by removing fuel fill hose at tank. Fuel fill hose is largest of 2 hoses. Insert the drain hose (from an approved gasoline draining station) into hose opening. Drain tank until empty.
If fuel pump module removal is necessary, refer to Fuel Pump Module Removal/installation for procedures.
INSTALLATION
If fuel pump module is being installed, refer to Fuel Pump Module Removal/installation for procedures.
Install fuel fill/vent hoses to tank fittings. To prevent hose from kinking, rotate each hose until index mark on hose is aligned to index tang on fuel tank.
Install hose clamps to hoses. Position clamps between index marks on each hose.
Position fuel tank to hydraulic jack.
Raise tank into position while guiding fuel fill and vent hoses into and through access hole in body.
Continue raising tank until positioned to body.
Attach two fuel tank mounting straps and mounting nuts. Tighten nuts to 10 Nm (90 in. lbs.) torque. Do not over tighten nuts.
Install both fuel hoses to fuel fill tube. Tighten both retaining clamps.
Position fuel hose shield to body. Install and tighten 4 mounting bolts.
Connect fuel pump module pigtail harness electrical connector near front of tank.
Connect fuel pump module supply line near front of tank. Refer to Quick-Connect Fittings for procedures.
Check the crank position sensor. I had the same problem in a 1989 cherokee 4.0, and the solution was simply to acomodate the sensor wiring. No replace was necesary
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
There is no such relay instead check the "Auto Shutdown Relay" and the Fuel pump relay. Have you checked the fuses? You can temporarily jumper either or both of these relays by using a small jumper wire to jump from terminal 30 to terminal 87 if the wiring is good the pump has to run if it's good. I hope this helps. Take Care.
check your fuel pump relay. if not that, then it's your fuel pump. the gas gauge is in the fuel pump, so if your fuel pump stopped working, your gas gauge won't work
there is a fuelpump relay in the engine compartment
along with three or four other relays find the one that says fuelpump and replace it (chysler - dodge - jeep - plymouth all use the same relay and thy all blow out the cost is about 15.00 dollars at autozone
of you don' t get the pump to come on check the pigtail back by the tank if still no power the pump
replace the ignition switch for that turns on the relay under the hood
is power getting to the relay? can you bypass the relay and get it to work? there is a fusible link to the relay.look on the relay, if you connect number 87 and 30 terminals the pump should run. if no power on terminal 30 the fusible link is blown/bad.
sounds alot the the pcm it controls the fuel pump and ign system but the anti theft would keep it from starting because the key has a transponder in it programmed for that vehicle and that would kill all ign if triggered
Does it start right back up after it stalls? make sure all conections are tight at fuel pump, sounds like it could be loosing ground at pump, or hot lead is loosing its connection at pump.Also fuel pump relay could be getting hot and quits working.
×