3800 Playing with Autotap

[stixx]

Can anyone provide or has anyonme seen a link that provides some basic "acceptable readings for O2, KR, Air/Fuel, etc? I'm borrowing an A-Tap, and would like to have a better feel for what ranges are acceptable. What are some of the key items to scan?

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[jk99gtp]

Somethings to scan would be:

At Idle, Cruise:

IAC Count (Check them at idle), anything above 40 at idle is good.

Long Term Fuel Trims (LTrims), +/- 5% is acceptable, best to get it between 0% - -5%.

MAF Frequency, allows you to see what the curent MAF frequency is if you want to tune your Ltrims with a Mini-Afc or ICCU device.

At WOT:

KR

O2 B1S1 voltage, I would guess anything between 910-940 is good. But I wouldnt rely on the O2 numbers too much if you are getting KR, get KR to 0 first then work on getting the best possible O2 voltage possible

IPW Bank 1 - Injector Pulse Width, anything I believe under 21-22ms is ok. I think over 22ms and you are maxxing your injectors out.

MAF Frequency
Ignition Timing Advance

There are probably a couple of things Im missing (Not counting the likely choices like Engine RPM, etc), but those should get you started at least...

Thanks,

Joel

 

[jk99gtp]

oh, if you are looking for a link. You can try this one and see if it helps:

http://www.clubgp.com/newforum/tm.asp?m=13...Check=802326094

Thanks,

Joel

 

[stixx]

Great info - thx Joel.