PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

New motor, passenger side fires, driver side doesnt

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Old Sep 26, 2009 | 08:07 PM
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Default New motor, passenger side fires, driver side doesnt

i had a mailorder tune done for my new motor, when starting the motor the passenger side fires fine but theres not fire on the driver side, is this possible to be a bad pcm or a bad tune, have tried everything and am begining to wonder if its the tune or a bad pcm , any help would be much appreciated.
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Old Sep 26, 2009 | 08:44 PM
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Default engine is throwing codes and only fires on passenger side

engine is throwing codes p0102, P0200, P0803 . please anyone help is much needed thanks.
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Old Sep 26, 2009 | 09:36 PM
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Try cleaning the PCM connections and try again. DO you still have your old PCM?
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Old Sep 26, 2009 | 10:08 PM
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have you gone through the harness? Mine did the same thing..and i ended up having the coil pack harness cut on the drivers side. Pull any tape/loom off and inspect the wire harness.
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Old Sep 26, 2009 | 10:28 PM
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i am using the original pcm. concluded its not the tune, tried a diff comp from a 99 and it did same thing, driver side will not fire at all, car started with same result. im feel`n pretty confident eithre a wiring issue is happening or my ignition coil is fubar. i am no tworking on it, i have a buddy doing it and have relayed all info to him, im am bout 100% confident its on his end at this point, i will know more tomrow and hopefully its a cut wire or a bad wire or somethign in relations to the wiring. thanks for your responses fellas , this damn ls1 is stressn me
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Old Sep 27, 2009 | 09:43 AM
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check your fuse it happen to me when i swap out pcm and my driver side not fire
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Old Sep 27, 2009 | 10:01 PM
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woot wooot, it was just fuses, lesson learned, its amazing how something so small can cause so much damage
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Old Sep 27, 2009 | 10:21 PM
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Which fuses.
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^ Drivers side coils get power from INJ 1.
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Old Sep 28, 2009 | 09:48 AM
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We did disconnect the battery negative before attempting to pull the pcm and re-install it............yes?

Might be a wise idea in the future since the pcm has a constant hot going to it.
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Old Sep 28, 2009 | 09:04 PM
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Redo your grounds, I had the ame problem once
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