I've played around with it so much in the last weeks it is hard to know what all has and has not been done.
At this point it rarely dies BUT it almost dies sometimes. Other times I come to a stop and it is perfect. I have finally tracked it down to the spark timing jumping down to almost nothing. No idea why it is. I wish there was a goto list of PIDs to log if you had problem X or something.
Attachment 18673
Looks exactly like my issue I had where map ran to ambient and spark fell to crap because of it, along with rpm.
I fixed it with TC and TF. Did you OS swap your truck?
I wasn't sure if a custom OS was out for this truck. That might help.
How much (max value) were you using? like .80 grams? 1.5 grams?
What injectors are you using?
LS2 Corvette injectors. Factory OEM Bosch.
You're doing your power enrichment through your commanded fuel in open loop table rather than through the PE tables... why have you got it set up that way?
He may be doing that from doing the old AutoVE procedure.Quote:
Originally Posted by statesman
I agree with you, he should be doing power enrichment thru the PE table (set EQR 1.175 for NA engine)...
( in OL the active fueling tables are the OLFA table and (when PE activates) the PE table... the richer current operating point/cell is selected from those tables )
Ok, something I saw:Quote:
Originally Posted by 2002_z28_six_speed
you're setup to fail the MAF, but in C6001 the MAF DTC's are set to 2-Trip... you need to change these to 1-Trip or to Non-Emissions, and verify that on engine start you get an immediate MAF DTC...
( if you don't get an immediate MAF DTC (which is the case with 2-Trip), the PCM is still using the MAF (and if the MAF is not physically present the PCM calculates a "sane" value for the MAF and uses that)... so if you intend to run SD it is utmost that you see a MAF DTC )
From B5916 and B5917 it looks like you never use the base spark tables, so all your spark would be coming from LO spark table B5914 (because you would have a MAF DTC)...Quote:
Originally Posted by 2002_z28_six_speed
so I suggest playing a little with the LO spark table...
( if you're not boosted, your spark table could be increased )
Oh man! It looks like I am using an out of date document for the VE tuning process.
Just tried searching the site a little bit --- Is there an official latest version with the basics of what to check for? I am beginning to understand I don't have all the puzzle pieces needed to finish this little project.
Thanks to everyone for contributing your years of experience.