No spark
08-15-2018, 11:04 AM
#1
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Location: NE Kansas
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Year: 1992
Model: Cherokee (XJ)
Engine: 4.0
No spark
I have a 1992 jeep cherokee 4.0 4×4 i have pit in numerous fuel pumps new distributor coil amd everything else. I have weak furl pressure and no spark to coil. Any suggestions
Last edited by Chad Ross; 08-17-2018 at 12:41 AM. Reason: No rep9n
08-15-2018, 11:14 AM
#4
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Have you replaced your CPS, crankshaft position sensor? Check the voltage, wiring
How do you know if you care not getting spark? I used some starting fluid, if it cranks and starts then you have spark...
For the fuel pressure have you checked out your fuel pressure regulator?
How do you know if you care not getting spark? I used some starting fluid, if it cranks and starts then you have spark...
For the fuel pressure have you checked out your fuel pressure regulator?
Last edited by Batman33165; 08-15-2018 at 11:16 AM.
08-15-2018, 05:10 PM
#5
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Year: 1992
Model: Cherokee (XJ)
Engine: 4.0
When i replaced the fuel pump this last time i changes fuel filter ansni also lookrd down in gas tank to see how dirty tank was is and it is absolutely clean i also replaced rhe crankshaft sensor. Put on new coil. I dont hear the pump prime. Somebody said something about reverse polarity cuz i had popped s 30 amp fuse. So i reversed wires and nothing so i put the wires back.no spark to coil. It only has 200,000 miles clean body. I hate to give up on it. It was the last gift i had got from him
08-17-2018, 12:43 AM
#6
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Year: 1992
Model: Cherokee (XJ)
Engine: 4.0
When i replaced the fuel pump this last time i changes fuel filter ansni also lookrd down in gas tank to see how dirty tank was is and it is absolutely clean i also replaced rhe crankshaft sensor. Put on new coil. I dont hear the pump prime. Somebody said something about reverse polarity cuz i had popped s 30 amp fuse. So i reversed wires and nothing so i put the wires back.no spark to coil. It only has 200,000 miles clean body. I hate to give up on it. It was the last gift i had got from him
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08-17-2018, 06:09 AM
#8
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Year: 96
Model: Cherokee (XJ)
Engine: 4.0
I do knot know your electrical knowledge, in general a fuse will blow due to much current, caused by a short circuit, poor connection, or faulty part
Reversing polarity on electronic components will generally destroy them, without necessarily blowing a fuse
You need to test for 12V on the fuel pump relay and circuitry.
searching recent posts will help you...search for poster nic Jordan96 (or similar)..he gives outstanding diagnostic explanations for these problems (repeatedly)
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