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Thread: cylinders 1,4,6 and 7 not firing

  1. #1
    Tuner in Training
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    cylinders 1,4,6 and 7 not firing

    04 silverado SS. new build . engine will start and idle only. Cylinders 1,4,6 and 7 are not firing. Non DOD Engine. No signal to coil to fire. I have double checked coil grounds, ecm supplied ground and coil voltage supply. no herz signal to fire coil being delivered to these 4 cylinders. verified CKP sensor voltage. RPM is reading on tach and scan tool. Looking to see if anyone has ever encountered this issue?
    Last edited by cfiester; 12-20-2022 at 12:03 AM.

  2. #2
    Tuning Addict blindsquirrel's Avatar
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    Since no Gen3 PCM ever even heard of DOD, and you're missing on exactly the same cylinders as the Gen4 DOD engines use, I bet you accidentally put in a DOD camshaft. 2005-2006 DOD engines came with 3-bolt cams and lots of people assume that if it's 3-bolt it's just another LS cam.

  3. #3
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    Im interested in how this turns out.

  4. #4
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    Thanks for your thoughts blndsquirrel. Problem is there is no spark at these coils. The ecm is not sending the herz signal to fire the coils.

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  6. #6
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    Quote Originally Posted by RDF1 View Post
    Im interested in how this turns out.
    24X reluctor wheel was on backwards. K1 technologies Crankshaft out of the box.

  7. #7
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    Quote Originally Posted by cfiester View Post
    24X reluctor wheel was on backwards. K1 technologies Crankshaft out of the box.
    Are they going to compensate you in any way?

  8. #8
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    Quote Originally Posted by 2xLS1 View Post
    Are they going to compensate you in any way?
    we will find out

  9. #9
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    Last K1 4" crank i bought was a 58x in a 24x box. Got to watch out for them. I learned my lesson to always have the little things inspected. Had a machine shop put a 24x on wrong and we caught it before assembling the engine.