NEED HELP!!! Jeep Won't Start
03-19-2014, 04:03 PM
#1
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Year: 1992
Model: Cherokee
Engine: 4.0
NEED HELP!!! Jeep Won't Start
Ok, so I have an 92 XJ 4.0. I'm having issues getting it to start. Checked the timing, it's right. Checked the fuel supply, it's getting fuel. Checked the spark plugs for spark and it's got spark. Replaced the CPS. Nothing that I've done so far has resolved my issue. Any ideas??? Thanks guys!!!
03-19-2014, 04:14 PM
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Year: 1998 Sport
Model: Cherokee
Engine: 4.0
Ok, so I have an 92 XJ 4.0. I'm having issues getting it to start. Checked the timing, it's right. Checked the fuel supply, it's getting fuel. Checked the spark plugs for spark and it's got spark. Replaced the CPS. Nothing that I've done so far has resolved my issue. Any ideas??? Thanks guys!!!
03-19-2014, 08:12 PM
#5
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Year: 1992
Model: Cherokee
Engine: 4.0
03-19-2014, 08:14 PM
#6
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Year: 1992
Model: Cherokee
Engine: 4.0
Ok, First of all I you said that you have spark and fuel. But do you have a strong blue spark? Any other color is not sufficient for the 4.0. And for the fuel did you just see if you had fuel in the rail or did you actually check the pressure? Your year should have 39psi + or - 5psi at the fuel rail. You need to check it with a mechanical pressure gauge.
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03-20-2014, 04:46 PM
#9
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Year: 1992
Model: Cherokee
Engine: 4.0
03-20-2014, 05:26 PM
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Year: 1999
Model: Cherokee
did you replace it with an OEM CPS?.....ive heard the aftermarket CPS's are hit or miss...
i had this exact issue with the same symptoms and it turned out my to be my CPS....
have you tried using starting fluid?
i had this exact issue with the same symptoms and it turned out my to be my CPS....
have you tried using starting fluid?
03-20-2014, 07:19 PM
#13
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Year: 1987
Model: Cherokee
Engine: 4.0 with 96 cam and 19lb.four hole injectors
Yes ,you can have spark and it still won't start due to a CPS not sending/generating a usable and consistant signal to the ECM. Do the "AC" test. Cruiser has the step-by-step procedure in his pink link.
03-20-2014, 07:28 PM
#14
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Year: 1987
Model: Cherokee
Engine: 4.0 with 96 cam and 19lb.four hole injectors
03-20-2014, 07:47 PM
#15
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Year: 1987
Model: Cherokee
Engine: 4.0 with 96 cam and 19lb.four hole injectors
My bad, you have a 92 with a three wire cps. The years 87-90 use a two wire cps that can be checked with a common multi-meter. Maybe some others can help you better than I can.