Quote:
Originally Posted by IBill4You
Full 2.5' exhaust, Boosted with BOV and EBC Omni Map sensor CEL Code P0068 supposedly running tune for 10psi on 93. Just filled up with 93 from 1/4 tank of 93.
Symptoms = bogging under WOT,
RPM increase when clutch pedal depressed unless selector moved out of gear
bogging below 3k rpm
CEL code resulted in loss of acceleration until car shut off. Would start and run poorly. Then would not start then would start and run okay.
I'm thinking either faulty MAP or bad tuning? Do the fuel trims appear okay?
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It looks like Long term fuel trim is disabled in your tune as it zero all the time or amazing good maf scaling.
http://engine-codes.com/p0068.html
could be a heap of things
bad MAP sensor settings in tune if your running aftermarket MAP sensor
faulty maf or map
intake leak boost leak ect.
did you clamp off hoses under intake manifold one might have blown off under boost.
around 3000 rpm is where your getting the knock up yo -5 degrees correction will cause some hesitation as ecu pulls timing and this is with Advance multiplier at 0.3 (it should be one) so ecu has already removed quite a bit of timing.
The Stock 02 sensor scaling does not read AFR richer than about 11.25, so without a wideband you cannot tell the actual afr your running. Boosted cars will run richer than 11.25, but stock sensor will not measure that.
you need to talk to your tuner about those issues.
all that stuff could be rersult of faulty sensor or air/boost leak