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did you have the PCM flashed? I know you can't simply write a fbody tune onto a truck PCM without having it flashed, different OS, at least I'm 99% sure. There are a lot of different operating parameters between the two systems. I know you can use a truck pcm to run a fbody and visa-versa.
i took the truck computer and rewrote it with a Fbody vin and etc. "Write entire". no issue after that. only time i have ever had an issue and was when i tossed my pcm in a monte carlo and i left the vats on.Quote:
Originally Posted by RedHeartbeat
I'd say it's because a lot of tunes disable misfire diagnostics....it's the only thing the CASE is for....to properly determine misfires.
When the reluctor, crankshaft, CKP sensor, or PCM is replaced, the specific PCM in that specific vehicle needs to "know" the "normal" deceleration rate of the rotating assembly. This is how misfire diagnostics work. The PCM knows of a misfire when the programmed (CASE) deceleration rate does not match the actual deceleration rate. The PCM is looking at super-rapid RPM flucuations that occur under normal, non-misfiring running conditions. When a misfire occurs, there is a lull in the spikes of RPM. The PCM sees this as misfire. Without a CASE learn (when misfire diagnostics are enabled), the PCM can set misfire flags when there is no misfire or NOT set a flag when misfire IS occuring. Disabling misfire diagnostics makes CASE not needed.
well, i just got the computer so i called a couple dealers to try to get the relearn done. on wanted $100, so screw them. the other seemed like he had never heard of a crank relearn and told me i would just have to stop by and they could see what they could do. im gona try to find someone around here that has HPTuners and hopefully they can help me out!!!
Hey quik i been readin ur posts and mentioned u write the programs urself. What software and cables you're using? I have a pcm that came from a 05 z71 that i like to make work with my truck 03 tahoe. Any help is apprecciatedQuote:
Originally Posted by Quik
Quote:
Originally Posted by mitch cobb racing
WOW
The CKP relearn procedure has been in place since OBDII and misfire diagnostics were introduced in some 1995 GM vehicles. LOL :tvhaha:
you have to keep in mind im in south alabama right now -- redneck country:badteef:Quote:
Originally Posted by GasGuzzler
and look in my "exhaust leak" thread to see what the dealership that didnt know what i was talking about did. im sure it will make you proud to work for the same people as those guys do!!
I don't work for anyone but Charles Brown...... and my wife of course.
Hey nate just curious, think its necessary to do the crank relearn on my truck when I visit Allen for the SD tune next week? I did change cam/springs/rods and stuff in it and no codes have come up so far but I just wanna be safe. It sounds like its running perfect though
Allen can do that for you when go for the live tune.Quote:
Originally Posted by Aggie