Thread: Need help with tuning 3.4 setup 2000 GTP in Colorado Springs

I have a 2000 GTP in Colorado Springs. It has Thrasher CAI, Speed Daddy headers through stock cat-back (no cat or rear O2), Autolite 104's, Intense tune (may be old, I dont trust it at all), ZZP Modular Pulley setup (currently running 3.6), and a 180* T-stat. I know with these mods and only a 3.6 pulley I should easily be at 0KR. On a hot day with an up to temp engine i am seeing up to 4KR in 1st and 6KR in 2nd!! This is VERY frustrating as I should be able to be running a 3.4 with no KR. I am thinking it is the tune.... it was in the car when I bought it and I dont trust it and think it might be old. I need to know what tune to get or if there is anyone local that could help me out. Thanks guys!

Update: Just went on a run with my Snap-On Ethos scanner with a new GM upstream O2 and found my A/F to be 10.6-10.9 at WOT!!! EEK way rich. I'm going to order a new tune tonight.

Check with Gojo83. I think that's the sn he's using here. He's somewhere out that way.

You could also sell the IRPCM...and snag up a 3800performance DHP PCM...best mail order PCM's evah

You need a wideband, that 10.6 is off the narrow band and is not accurate.

Originally Posted by TheOtherNick

You need a wideband, that 10.6 is off the narrow band and is not accurate.

True that.

Narrowband AF readings is good for cruise, thats about it.

Overall, you need a custom tune.

again correction..... the narrow band is accurate! but only at 14.7 its readings only tell if you are at above or below 14.7

things that can push the commanded AF way out of wack are injectors that arent flowing what they should. someone that tweaked the Injector flow rates, after market MAF sensors.

i have heard people who would use a wide band to tweak the Injector flow rate table so that the commanded AF is right on the WB's but i dont feel it is worth that effort. if you have a WB just use it and let the PCM do its thing.

Originally Posted by Nixon

Lol, that's because you're not making boost. -- 8.5 compression and no boost + 16* WOT stock timing = fail

agreed, however timing will be higher than 16* since it's based on load. Load will be lower, timing will be higher. Also, stupid rich for N/A.