Quote:
Originally Posted by jamesm
Yes, CA gas really is that bad. I would log and see if the iam drop is due to tip-in fbkc, which is quite common. If it is, reshape the ignition base and advance tables such that at low load where you're seeing the problem the value in the advance map is less than 3.9 degrees, while keeping the same total timing. This will effectively disable coarse correction in that range while still allowing the ecu to pull timing if significant knock occurs anywhere else.
Also look in fine learning to ensure that the values are being written into the lower load buckets and not up top where it would matter. You can't drop the iam without having significant flkc.
Remember there are three distinct modes of operation in the stock knock control logic, which never operate at the same time. It is entirely possible to have values in flkc while having not seen any fbkc.
You probably don't have an engine problem.
|
thanks for the advice. I'll do more logging and see if I can find the bad spots. Or just say fuggit and run e85 since it seems to fix all the problems, lol