PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

Same year To same Year PCM swap.

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Old Apr 19, 2008 | 01:25 PM
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Default Same year To same Year PCM swap.

Will I have any issues at all changing a 01 to an 01 pcm? I wouldnt think I would if it's the same year. Or is there anything I should know?
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Old Apr 19, 2008 | 02:06 PM
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You may have to perform a crank position sensor relearn procedure. From the factory, each PCM is put through a procedure that stores in its permanent memory variations in the crank reluctor and crank position sensor. Changing PCM's, crank position sensors or reluctor wheel will create a condition in which relearn is required.

You can either go to a GM dealership and have them do it with a Tech II, or if you have HP Tuners or EFI Live, do it yourself. I have HP Tuners and had to do it today for a 416 L92 I just dropped in. Ran terrible and kept throwing misfire codes untilly I finally did a CASE Relearn. Basically, you just hook up the scanner and rev the motor to 4000 RPM and which point an HP Tuners imposed rev limiter kicks in. That's it.

Also, if the PCM came from an ETC vehicle, such as a corvette, it will not work properly on your f-body, which has a traditional cable driven throttle body.
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Old Apr 19, 2008 | 02:20 PM
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Originally Posted by Matt-B
You may have to perform a crank position sensor relearn procedure. From the factory, each PCM is put through a procedure that stores in its permanent memory variations in the crank reluctor and crank position sensor. Changing PCM's, crank position sensors or reluctor wheel will create a condition in which relearn is required.

You can either go to a GM dealership and have them do it with a Tech II, or if you have HP Tuners or EFI Live, do it yourself. I have HP Tuners and had to do it today for a 416 L92 I just dropped in. Ran terrible and kept throwing misfire codes untilly I finally did a CASE Relearn. Basically, you just hook up the scanner and rev the motor to 4000 RPM and which point an HP Tuners imposed rev limiter kicks in. That's it.

Also, if the PCM came from an ETC vehicle, such as a corvette, it will not work properly on your f-body, which has a traditional cable driven throttle body.

Well sounds like a lot of work, I dont have any tuning software and its coming from an 01 trans am into my 01 trans am.. So I think I will get mine reflashed instead of swapping it.
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