Question about Cars & Trucks
I changed the relay fuse, cranks but doesn't start...I can't hear the pump priming. Thanks
Are you shure the pump is working,? Take the fuel line off,To see if there is fuel comeing up to the engine, When you have it off kick it over quicky to see if fuel is comeing out of the line, If not the fuel pump regulator might be at falt, Or the fuel pump it self has gave up the (Goat) end quit working,
Posted on Nov 06, 2012
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Posted on Jan 02, 2017
Between 100-140 thousand miles the fuel pumps go out on the 1993 cherokee. Its a fact. All parts are manufactured with the knowledge that it will last for a specific period of time then it dies. The relay switch was helpful for a brief while because there was still some juice in that pump, but now that it is gone it is gone.
If you don't see the fuse box under the dash in the driver leg area or beneath the radio check for a covered box under the hood. There should be a fuse spec guide on the lid of the box that tells you where specific wattage should go and for what purpose. But, your fuel pump problem will not be solved by a new fuse.
Posted on May 25, 2009
What you need to do is check you fuel pressure. Go to a local auto parts store and buy a fuel injection pressure tester. The pressure fitting is on the top of the motor its a 3/8 ish sized metal line and has a screw on fitting like a tire valve does. This line comes up from the back of the motor to the right of the distributor and goes down into the intake. Make sure to have a rag handy to catch the fuel seepage. After you connect the pressure tester turn the key on and off three times and read the gage you should have atleast 58 pounds of pressure. If you have 56 pounds it won't run because the fuel injectors are a poppit valve style and need atleast 58 pounds of pressure to operate.
Posted on Sep 12, 2009
The oil pressure gauge on the engine runs the fuel pump until the engine receives full oil PSI and shuts off. Upon that time the relay takes over for the fuel pump
Posted on Jan 25, 2010
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