Are you running open loop tunes or not??? My car runs and drives pretty good on a baseline tune with the fuel trims locked out, but as soon as you unlock them things go all to hell and the car won't run for crap. I'm talking N-A-S-T-Y fuel trim splits everywhere, throttle or no.

Just wondering how you were running.

 

how did you lock your fuel trims on a 93?

 

Tunercats.

 

I have tunercat or do you simply mean locking out closed loop? Meaning change the parameters for it to never enter closed loop.

 

I say just throw a LT5 in there and call it a day

-Dustin-

 

Sean,

You have my most recent tune, and it does run in closed loop pretty well. Idle is a joke, as it pegs to 160 on both, but as soon as it gets some RPM that cleans up nice. I have a more recent log that I am going to send you now so you can look at cruise info.

Chris

 

maybe it has something to do with all the oil that motor has consumed?

just a thought

 

That's one thing I'm thinking of as the pistons and combustion chambers were just COATED with carbon. Black as the night. I think a lot of the smoking at idle may be from it burning off too. I'm pulling a couple of plugs tonight for a look-see.


The tunercat thing is from some of the more recent definition files. Under the ECM Constants table, there's a BLM and Intergrator max and min slides. Just set them to 128 and you've got a closed loop locked fuel trim tune.