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Discussion Starter · #1 ·
Sorry it's so big. :rolleyes: This is my first scan and I'm not exactly sure what I'm doing. I would appreciate help diagnosing this. I only included full or close to full throttle scans. Anything else I should look for? TIA

 

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Harry,

We can see that the car is running lean and that you're getting a fair amount of KR. That means the car sees detonation on a regular basis. What are your mods? Please give a complete list. On your next scans it's also good to include injector pulse widths, MAF in frequency, MAP.

John
 

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Discussion Starter · #3 · (Edited)
My mods are in my sig. I had recently replaced my front O2 sensor. On a previous scan, I was seeing O2 readings of 935 MV at WOT,
ECT KR IGN LFT1 O2L RPM TPS

186.8 0 32 -7 80 1778 13.7
186.8 0 32 -6.2 795 1815 13.7
186.8 0 32.5 -6.2 75 2103 25.5
186.8 0 12.5 -6.2 885 2855 49
186.8 6.56 10 -6.2 925 3150 80.4
186.8 7.85 10 -3.1 935 3936 99.2
186.8 7.42 9.5 -3.1 935 4965 85.5
186.8 7.33 8 -3.1 915 2900 0

I will do another scan with those other items. PEM's are on the way, will they help? The best gas I can get here is 90 octane(4200 ft elevation). I had seafoam additive in the gas during the passes that I did that first scan, will that hurt? help?
 

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Sorry I missed your mods.

Forgive my stupidity but sometimes I live in my own little world. What are PEM's? The gas additive could definitely make a difference, but I don't know what seafoam is.

John
 

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Discussion Starter · #7 ·
Yep, ported exhaust manifolds
 

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The PEMs will help bring your KR down, but won't do much for your A/F. I'd still like to see your IPWs and try to understand why you're running lean. It could be any number of things. Tired fuel pump, clogged fuel filter, clogged or bad injector(s), kinked fuel line, bad FPR, bad O2, cracked vacuum line....

John
 
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