LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Random KR and other weird readings log inside

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Old Aug 13, 2003 | 12:20 AM
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From: Metro Detroit, MI
Random KR and other weird readings log inside

Well I just got my laptop so I decided to do a little data recording to see if I could figure out a few of the problems I was having at the top of 3rd at the track (car stopped accelerating and felt as if car ran out of gas or started pinging like crazy). I checked fuel pressure at top of 3rd when problem was occuring, and it was perfect so I assum it was too much timing.

This is a big log but there are really only two WOT runs up to 70 or so (can't go any higher because tranny won't shift 2-3...needs ANOTHER rebuild but at least this one is under warranty). I slowly got on the gas as you can see because otherwise I just go up in smoke, but I wound up roasting the tires pretty good anyways.

As you can see, I'm pulling 3-4 deg. of kr at WOT but my knock count does not go up. I'm not even running a lot of timing as you can see too so I just don't get it. Also, I randomly get knock while driving around sometimes up to the max of 9 degrees! I don't know if it's a bad sensor or not because I scanned the car a few months ago with this exact same tune and got no KR whatsoever at any point. Could it be something broken in my tranny that is causing the knock or could it be a bad sensor? Or something else? Any ideas would be greatly appreciated. Here is the file.
http://kak.com/patch/data.zip

btw...my car is a 94 w/ stock bottom end, xe230/236, P/P heads, vigi 3000 stall, and hooker lt's.
Old Aug 13, 2003 | 07:26 AM
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ltlhomer's Avatar
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I'm ordering a new knock sensor just in case today since they're cheap. Anyone got any other ideas?
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