ok, I have a feeling it's just the crappy walmart gas. I was in between towns and low as **** on gas so that's why I filled up there. I'll try some new gas and log some more.

Thanks for the help

 

nevermind, it definantly was the gas. I haven't relogged it yet, but I'm getting almost 2 mpg better than the walmart gas. I filled up with conoco since that was the best gas around where I go to school. seems to be working great in my truck right now. Thanks guys for the help

 

hehehe, you've come a long way whip! Listen to you, all smart now. Hard lessons are the best schooling.


Glad to see it was just gas. LOL haha, just gas.

 

Hey, once i learn it, its in there for good.

 

That is quite the KR spike there.

Do you have any pipes hitting perhaps? Anything else mechanical that could be causing this problem? Heavy carbon build up perhaps?

Also, for the future, I'd suggest logging GM.DYNCYLAIR for airflow reference. CALC.CYLAIR is not accurate at all, as it is just a derived value from the MAF input.

And unless you're entirely concerned with it, I wouldn't log the FUELSYS parameters, that'll clear up a couple of channels that you can use to log other items such as total misfires and delivered torque.

What are your mods?

 

I'm on a basically stock motor. It was a 02 pcm wait4metune before. I also have a k&N FIPK, magnaflow cats, and a dynomax bullet. I've changed a few transmission configurations on the wait4me, but no fuel or airflow changes.

 

I did 2 new logs. The first one I only had 2.1 KR, but the 2nd one spiked to around 7.0 at about 5k rpms. Here are the two logs. Let me know what y'all thing

Let me know what y'all think

Also, how do I post a copy of my tune?

 

Personally, I wouldn't post the tune without Jesse's permission. If you'd made extensive changes, then I'd say go ahead, but not with just trans changes.

I'll take a look at the logs in a few minutes here, as I'm sure everyone else will too.

 

A few things i see that dont make a lot of sense here. Keep in mind I am not a tuner by any means, just learning how to do this stuff so take what i say with a grain of salt, i am sure Justin will chime back in soon. I like to look at logs and try and figure out whats going on.

1st, it seems your LTFTs are on the high side, they seem to be floating around the +9 mark quite a bit. This could indicate a few things from what i understand. Leak in the intake between the MAF and the manifold, or maybe some injector problems?

2nd, you have some wierd fluxuation going on in your MAF readings. In both of your logs, it looks as if you have pegged the throttle (WOT) and are just letting it run up the scale. Well, there seems to be quite a few peaks and valleys in both your MAF (Hz) and MAF (Grams/s) readings. Your TPS is constant at 100% and your RPMs are climbing steady, but your MAF readings seem to go up and down inconsistantly. It would seem that your grams/s and your Hz should be climbing steadily just as your MPH and RPMs climb....but they dont, they dip in spots.

Also, in 2 instances where you came into some KR, your spark advance actually increased (log2 frames 62 - 63) and (log1 frames 204 - 205). maybe something is up with your high/low octane table. Really hard to say for sure without seeing the tune, but like Justin said, if its Jesse's you may want to get permission first. Remember, this is all stuff that looks wierd to ME and may mean nothing, im just a novice at this stuff so i look forward to someone explaining a few of these things to me too.

Still need to change that knock recovery rate table though..

 

I tried to open the logs with EFI and cant view the logs?????