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I'm also LE5 supercharged. Had these issues for years and have given up. 86k supercharged miles on the LE5 and still going strong (minus the idle surges)

I am running a CAT. Its been a while, but I think what I was trying to do was disable the P0420 code completely because I thought when you disable the COT ( and I don't know why you...

Thanks for the reply

O2 sensor, should I replace the one before or after the CAT? Which one would throw that code? I'm guessing the one before the CAT.

They have been accumulating over time. I...

Engine: 70k boosted miles on a LE5

I think most of these could be related...where should I begin the troubleshooting?? Completely overwhelmed. I uploaded my tune so you guys can take a look.
...

What would cause these misfires? I don't log any misfires under high throttle/high load.

i've got 6deg of knock in the upper RPM's. I've already lowered timing. I don't know why it continues to knock. I have solid transmission mounts, and clutchmasters fx300 clutch.

I use hpt...

anyone? can someone check the multipliers? maybe I'm missing some that I don't know of? any help is appreciated.

Not sure what I'm missing, but I lowered timing and still get some serious knock. I haven't logged this car in awhile so either

A) I am not tuning the timing correctly
B) H/E pump is dead
C) A...

So how does this apply to the Ecotec LE5?

crap i thought i saved my logs after plugging it in. my bad. i did 2 logs before plugging it in to see what i got and i noticed it wasn't doing what i wanted. so i plugged it in and i guess i thought...

But I am logging AFR. I see it in the logs. I'm not using fuel trims. I was in forced open loop when I pulled these logs too.

Odd thing is, OL out of boost it says I command 13.47 afr and in...

2.5 bar map. re-adjusted the MAP to reflect that the 2.5 bar map is in there.

check out these logs. when I go into boost, the log shows I'm hitting >5900hz MAF but it's not logging any MAF error %...

Yep, this is taking me a while. I was in California for work alot this month and in between working on my Masters, this was the first time I had a chance to look at it again.

I did use that table. Here's my tune with latest log file. I did a quick blip from 30-50ish and it was about 13.7 the whole way. Not sure what I'm missing. BTW this is still with the intake that I...

When tuning in open loop, I read somewhere where it said "Don't go WOT". My adders are all zero'ed, and when I go into boost it's still lean (12.5? ish) even though I'm commanding 11.5 at any given...

Can't get the car into open loop. What is the correct procedure?

i think it has somehting to do with when you change the map sensor and rescale it in the table, because my car does the same thing. there is probably something else that needs to be adjusted when you...

high egt? gap on your plugs?

I adjusted the p0101 and p0121 codes so that they'll never be reached. Attached the tune so you guys throw me a few bones. Again, I'm trying to learn this program. Not looking for spoon feeding.

Just like you said, stevo...started up in reduced power mode, and stalled! Any ideas?

And dumb question....not going into open loop. What is the procedure to force open loop?

I'll have to look into those codes. I'm not throwing any as we speak. I haven't started in power reduced mode yet, either.

Yep, I did that. Worked great. I'm away from home on business so I won't have time to look at it until this weekend. But if you look at the log, you'll see a crazy idle in the beginning and then it...

Well, got it to go into PE...here is my new log.

Some weird stuff goin on upon startup, so take note of that...

and

Frames: 7135....12,275......14,300....

Logs:

Car didn't go into PE like I thought it would. Interesting.

Supercharged my LE5 1.5 yrs ago, and ran it on a pretty rough tune. Super rich and made ok power. Now I have a smaller pulley ready to go, but can't figure out what my tuner did to the tune to make...