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Help with PCM

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04gpking85

New member
I was looking at getting the digital hp PCM from pfyc.com. I was wondering what is a security relearn and would all the instructions on how to do that be included when I purchase it? Secondly what is a core charge. I am learning so any help would be great thanks.
 


First, don't bother with their PCM. Get one from Will at Overkill.

Second, the security relearn is part of your car's security system. The PCM has to learn itself to your car. The instructions are right here:

http://www.cartuning.ca/images/whitepapers/Key Relearn Procedure.pdf

A core charge is what you pay for the part that they're sending you. In the case of a PCM, the core charge pays for the physical PCM they send you. The rest of the money pays for their work on the programming in the PCM. When you get the PCM, and send back your old one, they give you the core charge back. It's kinda like a deposit. If you don't want to send yours back, you just bought the physical PCM at their cost. The only way around a core charge is to send yours in first.
 
cuz hes the man lol...if u can change an air filter u can change pcm...nobody on this site will steer u in the wrong direction...ive heard nothing but excellent stuff about wills pcm's
 


u shouldnt need a case relearn, Will said that u only need a case relearn if you get a check engine light. A well spent $170 thats including the core charge. I wanted to keep my old one for when i go turbo or s/c. I forget what shipping was but it took a while. About 2 weeks for me.
 


99prixgt said:
u shouldnt need a case relearn, Will said that u only need a case relearn if you get a check engine light. A well spent $170 thats including the core charge. I wanted to keep my old one for when i go turbo or s/c. I forget what shipping was but it took a while. About 2 weeks for me.
Click to expand...

I always thought you needed a case learn on any 98+ cars unless you were putting the same pcm back in. I read this on the intense racing forum.


"The crankshaft position system variation learning feature calculates the reference period errors that are caused by slight tolerance variations in the crankshaft, the crankshaft balancer interrupter rings, and the crankshaft position sensor hall effect switches. The calculated error allows the PCM to accurately compensate for reference period variations. This enhances the ability of the PCM to detect misfire events during a wider range of engine speed and load conditions.

The crankshaft position system variation values are stored in the PCM non-volatile memory after a learn procedure has been performed. If the crankshaft position system variation values are not stored in the PCM, DTC P1336 will set. The learn procedure is required after the following service procedures have been performed:

PCM replacement
Engine replacement
Crankshaft replacement
Crankshaft balancer replacement
Crankshaft position sensor replacement
Any engine repair which disturbs the crankshaft or the harmonic balancer to crankshaft position sensor relationship. "

"You DO need to perform the Crankshaft Variation Learn procedure if you physically install a new PCM, replace the crankshaft, camshaft, timing chain, crankshaft position sensor or balancer.

You DO NOT need to perform the Crankshaft Variation Learn procedure if you have new code flashed into your current PCM."

Not trying to contradict you bro just trying to put out as much info as I have on the subject. The only reason i havn't got a pcm yet is because I don't want to have to get a case learn every time I step up the modding or be without the car if I send the one I have in it out. I could be wrong but I just want to throw what i read out there, I have always had awesome luck with INTENSE.
 
I've got a bone stock '02 GTP. Would this be a good first mod to get or should I hold off until I get CAI, U-bend & exhaust? The intake and exhaust stuff is about a year off. I'm curious if I would see any gains with a PCM upgrade on a stock car and whether it's worth it.

Thanks,
Tim
 


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