1. 04 Grand Cherokee 4.0L

    I have replaced the crankshaft position sensor, camshaft position sensor, coil strip, asd relay n fuse, checked fuel all is good there. But still wonít start and have no spark, Iím stumped and donít know what else to do.

  2. #2
    Join Date
    Dec 1999
    Location
    Virginia Beach VA
    Posts
    8,073

    Re: 04 Grand Cherokee 4.0L

    Does it give you any codes?
    My 2005 Wrangler Build Thread

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  3. #3

    Re: 04 Grand Cherokee 4.0L

    Nothing


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  4. #4
    Join Date
    Apr 2003
    Location
    Pembroke Pines, FL
    Posts
    319

    Re: 04 Grand Cherokee 4.0L

    Did you check the neutral safety switch?


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  5. #5

    Re: 04 Grand Cherokee 4.0L

    No I havenít how do I does so?


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  6. #6

    Re: 04 Grand Cherokee 4.0L

    But it shouldnít be the neutral safety switch because it cranks over in park and neutral I just donít have spark....


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  7. #7

    Re: 04 Grand Cherokee 4.0L

    My scanner didnít pick up any codes but, I used the method of turning my key on 3x and got p1388, p0320, p1490, p1489.


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  8. #8
    Join Date
    Feb 2009
    Location
    Dayton Ohio Area
    Posts
    5,673

    Re: 04 Grand Cherokee 4.0L

    First check your battery. Get it load tested. Then clean terminals and grounds. They cause weird issues and codes.
    Was the CKP OEM that makes a difference?
    P1388 ASD relay. Worth swapping with the horn to see if that is it.
    p320 cKP sensor maybe bad out of the box. Be sure new has a spacer. Otherwise it could crack on first start if inserted too far.
    P1489 and P1490 are cooling fan speed errors.


    Never look down on anyone unless you are helping them up - Jesse Jackson
    "Never look down on anybody unless you're helping him up" - Jesse Jackson

  9. #9

    Re: 04 Grand Cherokee 4.0L

    Had the battery checked already.
    An the CKP was an oem replacement.
    I put a brand new asd relay in.
    Already double checked the CKP.
    And donít know about the cooling fan errors.


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  10. #10
    Join Date
    Feb 2009
    Location
    Dayton Ohio Area
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    5,673

    Re: 04 Grand Cherokee 4.0L

    Does this have a security system?


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    JPNinPA

    Never look down on anybody unless you're helping them up. -Jesse Jackson
    "Never look down on anybody unless you're helping him up" - Jesse Jackson

  11. #11

    Re: 04 Grand Cherokee 4.0L

    A factory one yes, I just ordered a new pcm for it today


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  12. #12
    Join Date
    Feb 2009
    Location
    Dayton Ohio Area
    Posts
    5,673

    Re: 04 Grand Cherokee 4.0L

    If I recall there is a way to reset the sentry system if that is the issue. First you are using stock keys. Correct?
    I'll have to dig a bit to find the process steps.


    Regards,
    JPNinPA

    Never look down on anybody unless you're helping them up. -Jesse Jackson
    "Never look down on anybody unless you're helping him up" - Jesse Jackson

  13. #13

    Re: 04 Grand Cherokee 4.0L

    Alrighty so my new pcm came in today and I got it all put in but still no spark Iím at a lost cause now.


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  14. #14

    Re: 04 Grand Cherokee 4.0L

    Double check all your electrical connections. I was stumped yrs ago with my 76 F100 4x4. I had a short section of the wire harness that checked good when you put the probes on it but was dead when you took the probe off. I had replaced most of the ignition components before I discovered those wires were bad [I had checked it multiple times]

  15. #15

    Re: 04 Grand Cherokee 4.0L

    Already Iím currently doin this and noticed that there is what looks like a relay bolted to the side of my block and, idk what it is


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  16. #16

    Re: 04 Grand Cherokee 4.0L

    04 Grand Cherokee 4.0L-image1604773846.301507.jpg
    This is what Iím talking about


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  17. #17

    Re: 04 Grand Cherokee 4.0L

    Nvm I found out that is the ignition capacitor could that be my problem?


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  18. #18

    Re: 04 Grand Cherokee 4.0L

    Update changed the pickup and the ignition capacitor still nothing


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