What will happen if you reset the pcm after a dyno tune w/ls1edit? Not immediately just in general. The reason I asked is I recently got a dyno tune mainly to figure out why I was getting exhaust pops and backfires. The car showed up running rich as hell at part throttle and lean as **** at wot. We tuned the car and a few times and after the 4th pull the computer was a happy camper, going from 314.9/326.7 on the first run to 337.7/346.8 on the last. We went for a test drive and it still pops. Put a tune back in fully enableing the DFCO, took it for a test drive still popped. Leaving the shop I couldn't really notice the 22.8hp and 20.1tq I gained. Which I thought was strange because you should be able to feel that. Then that night I figured out what was causing the exhaust pops thanks to another persons thread.
https://ls1tech.com/forums/showthread.php?t=328977Being that this was going on during the tunning did It mess anything up? Dyno graph here
https://ls1tech.com/forums/attachmen...chmentid=36112

 

please help. TIA

 

What mods did you do when it started happening?

 

there were no mods on the car when it started happening. What I am asking is that I had the car tuned while this was going on, the whole reason I was going to a tuner was to have it fixed but it turned out not to be a tuning issue, it was the check valves were stuck on the air system causing the backfires. I know this was causing a A/F ratio problem. Being that this was going on while I got a tune did I really get a propper tune, should I reset my pcm so it will load the tune back in from memmory since the problem is now fixed. Or will it learn it's own program, I don't know much about pcm's.
The tuning for all my mods and just to get more power out of the pcm was done to days ago, the backfire problem was fixed the day after the tune,
basically is the tune any good now?

 

I've had my car tuned and it's been reset before and i've never noticed a loss in performance or change in idle or anything.

 

what will happen to the tune once reset being that the problem that was there during tuning isn't there anymore

 

I dunno, I guess depends on how they tuned it. I'd reset it and then drive back to the tuner and tell them what you fixed and get them to correct the tune for it

 

he used ls1 edit. He is also 31/2hrs away

 

If you mean resetting your pcm by pulling the fuses, you won't lose your tune.

 

Thanks would you reccomend doing that in the situation I am in.

 

So you have your air system blocked off now and no backfiring? If that is the case I would leave it alone. I can't think of anything that would've been changed for your tune that would have to be changed back now. Unless you need your air codes deleted or something.

 

Know I had all codes deleted while I was there, I was just thinking that the bad air system was messing with the A/F ratio during tuning and possibly my tune isn't up to it's full potential.

 

Jimmyblue or horist how about some reassurance. TIA

 

I agree with what you are saying. Redo it now that the bad air system is no longer a variable. Do some ATAP logs if you can to verify this ( looking at LTFT's and O2's ) seeing as how your tuner is so far away.

 

Thanks, I know it's kindda hard to figure out what I'm saying, but it sounds like you got it. I think I'm gonna try and reset it.