Hi Guys
I have question - I replaced my Cam and have been tuning my PCM (slowly). I was reading some old postings and somebody stated that you should perform a Crank position sensor relearn after replacing the Cam and doing tuning. When I have not done that and was wondering if I should do it or leave well enough along?
Thanks
Bill

 

The ECM will let you know if it can't learn the crank position - it will throw a code P1336 "Crankshaft Position System Variation Not Learned".

If you have no code, you shouldn't need to worry.

BTW - only a Tech II tool (dealer) or newer verions of EFILive software can do the CASE relearn as far as I know.

Normally it only needs to be done when replacing the PCM or the crank reluctor/sensor.

Bad30th

 

HP Tuners is adding that feature pretty soon. It is one of those things people wanted and they are adding.

 

Thanks - I have the latest version of EFILive, so I could do it but there are no codes. I will leave well enough alone.
Bill

 

You can also do this with some models of Snap On scanners, you can rent ti at Pep Boys.