The MS2 should be a pretty straight forward install on my vette, it doesn't need any aftermarket cam sensor setup and I've built a MS1 for my turbo Miata before. The tuning part on that ecu was a lot easier than what I've dealt with trying to tune my stock vette ecu.Originally Posted by dave w
From what I can tell my tunes are changing based on weather conditions of the day. It's finally getting cooler in AZ and it's messing up my tune. probably has something to do with the fact that tunerpro won't accept my bosch injector offsets so I'm using the stock offsets and now it doesn't know how to make adjustments because it's using bad information.
Today I warmed up the car and it was lean cold, rich while warming up and just a little lean at operating temp. it was way lean cruising but if I stepped on the gas it was good 12.5-13.0 afr. But then it would start the lean out again at higher rpms 4500+ about 14.5 afr and I'd let off the gas.
how do you mean? lets see your bin, xdf, and target offset data
I mean it's hot as hell in Arizona and that's the last time I tuned the car and it's stayed hot until recently and now my tune is way off. My tune was never really too good to begin with.
I did just have success richening it up. I got a wide open throttle run in an it was pig rich all the way! I did this by setting the 'Open Loop % Change AFR vs Temp' to all zeroes, and 'Open Loop % Change vs MAP' to all zeroes. The one that made the big difference was 'MAT Compensation Counts vs MAT' set to all zeroes. after the very rich WOT run I adjusted the affected temperature ranges to 40 down from the factory 128. it got my idle around 13.5 AFR and full throttle the same.
Why so many crazy variables on this car!? I'm tempted to set everything to zero and just run off of the fuel map alone and retune the map for it The only noticeably affective variable was the 'MAT compensation Counts vs MAT'
Here's todays bin.
I'm using the $8D-1227730-V1.xdf.php
for some reason I was not allowed to upload it here. it said it was an invalid file.
this isn't at all normal, there are no 'crazy variables'. 8D is supposed to be really easy to tune, with a VE table in the ballpark, it should be drivable in all conditions. i tuned an 8D car for a guy once and had no problems, in fact on the stock bin it ran alright, just sucked a lot of fuel.
i know it's frustrating but do you want to try starting from scratch?
i looked at your bin and i think your VE tables are probably awful. i also saw a few tables for fuel compensation vs temperature and map were zeroed out. i think those are best left alone.
with your trouble with injector offsets, show me the injector data you're trying to enter and lets figure out why it wont take it. it should accept anything from zero to 7782 usec. just focus on getting the ~9-14v values correct, if you're outside that range, you're limping home anyway. i wonder if you're trying to put msec values in there or something.
i'd like to clarify that statement and just say that after tuning speed density for a while, you get to look at a ve table and go 'that shit will never work'. and that's exactly what pops into my head when i see yours.i looked at your bin and i think your VE tables are probably awful.
was this developed from wideband data, trims, by feel, or what?
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