Stuck lifter?
04-22-2010, 04:56 PM
#64
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04-23-2010, 12:41 AM
#68
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Anyone here use TunerPro?
I took a log of my car during different conditions for a buddy of mine to look at. WOT from 0-70, cruising at 50mph in 2nd gear, neutral rev, etc.
TunerPro counts knock up to 250 before going back to 0.
Rolling over the knock counter 4 times means my knock on a 15 minute drive was over 1000. That counter was rolling like a Las Vegas slot machine. Either this is the cause of my problem, or this broke something and whatever it broke is causing my rough idle.
I had 3/4 a tank of gas, which I topped off with 93 octane premium, and added a bottle of octane booster. I'll see how she runs tomorrow.
Any ideas?
I took a log of my car during different conditions for a buddy of mine to look at. WOT from 0-70, cruising at 50mph in 2nd gear, neutral rev, etc.
TunerPro counts knock up to 250 before going back to 0.
getting a good ~12:1 AFR at WOT.
at 5222 RPM, you're hitting a 92.7% injector duty cycle. AFR was still ~12:1 though.
your long-term fuel trims before going WOT are showing you running ~16% lean before O2 correction.
knock is looking ridiculous, even rolled over the counter 4 times...
coolant temp during this process stayed very reasonable.
i don't know how prone 3800 heads are to knock(let alone the L27 heads), but DAMN! the PCM even looked like it disregarded it at times and didn't retard spark until the knock was more aggressive...
at 5222 RPM, you're hitting a 92.7% injector duty cycle. AFR was still ~12:1 though.
your long-term fuel trims before going WOT are showing you running ~16% lean before O2 correction.
knock is looking ridiculous, even rolled over the counter 4 times...
coolant temp during this process stayed very reasonable.
i don't know how prone 3800 heads are to knock(let alone the L27 heads), but DAMN! the PCM even looked like it disregarded it at times and didn't retard spark until the knock was more aggressive...
I had 3/4 a tank of gas, which I topped off with 93 octane premium, and added a bottle of octane booster. I'll see how she runs tomorrow.
Any ideas?
04-23-2010, 10:19 AM
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Still, that'* a crazy amount of knock. Any idea what could be causing this? Aside from dynamic compression of course.
