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I have a really basic question. Trying to understand what the car is doing doing during these these drops in MAP & Spark(See Attachment). Trying to learn but there does not seem to be a lot of good content on how to read the scans. Any suggestions for learning would be great!
my guess would be DFCO or AFM
I have disabled DOD already.Quote:
Originally Posted by Bill@HPTuners
Could you post the log here?
Attachment 102202Attachment 102203
Attached logs and current tune with DOD delete and CAT delete.
I think I agree with Bill, looks like decel fuel cut-off being enabled when you coast for a few seconds. It shuts off fuel and timing goes way down.
You also forget to disable the cat test in the engine diag's exhaust tab and forgot to disable COT in the tune. You should also go through the DTC's list and disable all the rear o2 sensor codes because you may get some of those with the cats removed.
thanks for the suggestions! THE COT is pretty straight forward. I have been reading on DFCO looks like about 50/50 in terms of disabling. Looks like there are several ways of disabling also. Some people mention likeing the poping/crackling noise it causes but i have not noticed that. Any advice on how to disable and pros/cons?