HOLSTEIN Posted September 17, 2005 Report Share Posted September 17, 2005 ordered a tune and am expected to get a crank relearn code.... as i said i am EXPECTING to get this code on the basis that just about everyone gets it upon install of new tuned pcm...... will this hurt the truck driving it for a day??? also, will this code be easily fixed w/ a "Snap On" scanner/diagnoisis tool???? any special advice i can tell the mech before he starts??? sorry for all the questions, thanks tim Link to comment Share on other sites More sharing options...
budhayes3 Posted September 17, 2005 Report Share Posted September 17, 2005 As long as the crank variation isn't that far off you should be fine. I drove around for a few weeks one time before getting the crank relearn done. On another instance, I swapped in a PCM and it would barely idle until I had the relearn done, but I believe that is pretty rare. Not sure if the SnapOn scanner is capable of doing that, but I would assume that if it's up to date, it should be able to. As far as special instructions, be sure to tell the tech that you just want the code cleared and the crank variation relearn performed...don't let them reflash your PCM or you will lose your custom tuning. (I think that reflashes can only be done with a TechII) Link to comment Share on other sites More sharing options...
TimB Posted September 17, 2005 Report Share Posted September 17, 2005 Ive had that code for a couple months now and Im pretty sure only a tech II can clear it. I have had several pcms tuned and this is the first one that gave me this code so you might get lucky. Link to comment Share on other sites More sharing options...
BenKey Posted September 17, 2005 Report Share Posted September 17, 2005 The one done with a techII only takes a couple of minutes. I did it on my last go around on the motor. The code can be cleared by a normal scanner, but I assume it would come back. It can also be done with EFIlive with bi-directional controls. It's called a CKP re-learn. Link to comment Share on other sites More sharing options...
HOLSTEIN Posted September 18, 2005 Author Report Share Posted September 18, 2005 thanks ben, good to here from you... i may not get this code i guess it is just hit or miss....... any idea of why some do and some dont Link to comment Share on other sites More sharing options...
FuelSlut Posted September 18, 2005 Report Share Posted September 18, 2005 my understanding.... if you ship YOUR pcm to them and get YOUR pcm back... you "shouldnt" have to perform the ckp relearn (but MAY benifit from it), however if you have ANOTHER pcm shipped to you, and ship YOURS back as core... you must perform it seeing as how it is not YOUR original pcm with your ckp learned to it.... does that make any sense? Link to comment Share on other sites More sharing options...
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