Cm 870 cry for help

[SIDE_SHOW]

(08-03-2019 )Rawze Wrote:  

(08-03-2019 )SIDE_SHOW Wrote:  

(08-03-2019 )Mr Hagg Wrote:  I will say this if you had cpl 8519 and current 8520 and using ECM from old engine your biggest problem your facing is camshaft timing. 8519 is 4 degrees on injector cam and 8520 is 6 degrees so if you used a file for the 8519 i could see a real issue.

What kind of damage would that do too much fuel or not enough? If that's the case then it has been that way for about 40k miles... I for sure need to get that correct before anything else... I know the parts inside are the same I wonder what other timing and things like that are different

I posted how you should verify what you got here...
http://rawze.com/forums/showthread.php?t...8#pid41828

if you have not done this yet, you are only continuing to guess in the dark.

I have verified that the esn and cpl are correct for the current engine... I also called the guy that did the tuning and asked him about the timing proceeded to tell me that the timjng didn't matter and didn't need to be changed that they were the same between those cpls so the didn't need to be changed and then he told me how do you think tuners add power we jump to the next cpl numbers till we get what we want... That made me want to cringe because I'm sure that is not right...