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post #1 of 3 Old 08-25-2019, 06:01 AM Thread Starter
JeepofWB
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No Start

I have a 2005 Wrangler 4.0 that cranks but will not start. Pulled it in the garage last week and it was running fine. Went to use it a week later and it cranks strong but does not start. I have changed the crank sensor but that did not help. I'm thinking it may be the PCM. Is there a simple way to check it and if it is the PCM does anybody have an idea where to get a replacement?

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post #2 of 3 Old 08-25-2019, 08:45 AM
jtec
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So a no start = PCM ?

What diagnostics have we done ?
Attached scanner and observe data?
checked for codes?
Fuel pressure?
12v at coil?
12v at injectors?
Inj pulse?

Try this as someone tries to start jeep spray carb cleaner into throttle body - did it fire and try to start?

When I see the price of OEM I think aftermarket.
When I see the quality of aftermarket I think OEM.
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post #3 of 3 Old 08-25-2019, 10:24 AM
CJ7-Tim
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What is missing during the no-start, fuel pressure, fuel injector pulses, or spark ?

Failure of the PCM should only be considered after complete and in-depth trouble shooting and diagnostics of the more common and more logical causes for the symptoms described.

Did you install a genuine Jeep Crank Position Sensor, or a cheap crappy Chinese clone auto parts store CPS ?

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