No start
#16
CF Veteran
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OK, so no codes stored. Too bad, but not the end of the world. Codes can be giving you a lead in where to look, but if not present, diagnostics will narrow thing down most likely.
So, you have a crank-but-no-start situation. First thing to do is check for spark and verify fuel pressure at the rail. This will give you a rough idea what to chase (first).
check fuel pressure with a gauge: 49 PSI +/- 5 is within specs, IIRC
Check for spark ( google procedure for this)
Report here what you find. You will have to do some diagnostics, because just asking for a cause will give you many forum members shooting " what worked for them" at ye, and before you know it, you find yourself replacing many parts and chasing you tail.
So, you have a crank-but-no-start situation. First thing to do is check for spark and verify fuel pressure at the rail. This will give you a rough idea what to chase (first).
check fuel pressure with a gauge: 49 PSI +/- 5 is within specs, IIRC
Check for spark ( google procedure for this)
Report here what you find. You will have to do some diagnostics, because just asking for a cause will give you many forum members shooting " what worked for them" at ye, and before you know it, you find yourself replacing many parts and chasing you tail.
#17
Junior Member
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Join Date: Jun 2010
Location: South Carolina
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Year: 2000
Model: Cherokee
Engine: 4.0 L
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Just got Jeep back from shop. It ended up being the crank shaft position sensor. I'm kicking myself because I had one bolt off the sensor and had trouble accessing the other one. I gave up instead of buying a longer ratchet extension. Luckily the mechanic I took it too didn't charge much at all. Thanks for all the help guys
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