New at this, help needed with these graphs

[wicked-98]

This thread will explain a little about whats happening
http://ls1tech.com/forums/pcm-diagnostics-tuning/1517878-hpp3-weird-results.html

I want to learn as much as possible before I start tuning but what little I understand makes me think as if the spark is quite a bit high. Heres 2 images of my log. Don't know how to upload the full run yet. The first one is showing 2 of the 3 knock detections. The second one is showing the 3rd and you can see where I was checking for the miss or stumble at 4k rpm and about 28% throttle. No check engine light but it sure misses at part throttle.Any thoughts are welcome. Hope I didnt post twice lol:tongue:

http://i269.photobucket.com/albums/jj61/wicked-98/IMAG0365.jpg

http://i269.photobucket.com/albums/jj61/wicked-98/IMAG0366.jpg

[wicked-98]

heres the log

[Gregs]

those knocks are nothing, probably not ever real knock so i wouldn't worry about them. your fuel trims are pulling a lot of fuel out, its possible that your misfire is caused by running too rich, i had that happen once.

WOW! I think you logged every perimeter available! I think its like 22 channels you are supposed to limit it to.

[joecar]

When you log too many pids, the sampling rate (the rate at which pids are read) is too slow so you miss some information.

To obtain the fastest sampling rate, limit the pid channel count to 24

[ each pid occupies one or more pid chaannels; e.g. RPM and MAF occupy two channels; ETC and IAT occupy one channel ]

the channel count is shown at the bottom of the PIDs and Data tabs.

[wicked-98]

When you log too many pids, the sampling rate (the rate at which pids are read) is too slow so you miss some information.

To obtain the fastest sampling rate, limit the pid channel count to 24

[ each pid occupies one or more pid chaannels; e.g. RPM and MAF occupy two channels; ETC and IAT occupy one channel ]

the channel count is shown at the bottom of the PIDs and Data tabs. ok I'll try another run today and see what comes up. How does the spark look to you guys ? I thought it was a little weird that it jumped around so much

[joecar]

Spark tends to jump around with load (cylinder airmass).

[wicked-98]

Spark tends to jump around with load (cylinder airmass).

ok, is it suppose to be that high though? and the afr looks to be a bit rich, but i dont know how accurate these denso O2s are. Im getting a wide band O2 soon as I get a chance

[joecar]

At low load it seems a little high maybe, but at high load it drops down.

[wicked-98]

Yup ! That's the description my buttmeter was looking for lol

[wicked-98]

finally got another log done

[joecar]

Ok, I'm sorry it took me so long...

your NBO2's are switching at part throttle but a little slower than I like (0.7s vs 0.3s), but they may be ok; if they have more than 60K miles then replace them;

that being said, your LTFT's at PT are -14% on both sides, indicating that the PCM is trimming by removing fuel (possibly MAF and VE are over-reporting airflow, or IFR table is under report injector flow rate) (whatever is causing this is common to both banks)

[ transient airflow under 4000 rpm: airmass is from VE;
steady consitions under 4000 rpm: airmass is from MAF;
above 4000 rpm: airmass is from MAF;
]

I see HO2Sx1 go above 930 mV at WOT, indicating that possibly you're sufficiently rich at WOT (but should confirm this with a wideband).

MAF and MAP waveforms look correct (MAF increases to 265 g/s as rpm approached 6000 rpm);

Ignition timing (SPARKADV) looks correct for a 1998.

[wicked-98]

I know It's running rich. I just wanted to be sure my spark was ok . Thanks !