lt1 oversensitive knock module

**96z28camaro** · 07-08-2006, 04:42 PM

I originally purchased a scan tool for gm vehicles. i replaced the knock sensor, and installed an LT4 knock module (part number 16214681) and my problem is the scan tool is showing like 3-5 degrees retarded timing at idle. when i tap on the exhaust under the passenger seat, the engine almost dies. also when i slightly tap on the intake manifold, the timing is retarded so much, the engine almost dies. No exhaust rattling or leaks. its a 1996 TA, OBD1 installed, Lt1 engine, has hedders and lt4 hotcam kit. it has done this for a while now. if i slowly rev the engine, the scan tool shows no timing retard, but if i fast rev the engine, the scan tool shows max retardation. also crusing down the road, at about 1500rpm, timing is retarded about 7-15 degrees. what could be my problem? Any help would be greatly appreciated. im stumped..

John

**wicked_95z** · 07-09-2006, 05:40 AM

Has it done this through a few tanks of gas or are you on the same tank still???

**96z28camaro** · 07-09-2006, 06:39 PM

it has done this through 5 or 6 tanks of 93 octane

**wicked_95z** · 07-10-2006, 06:10 AM

Does your pcm have any kind of aftermarket tune on it? What are your engine temps like. Is there any way you can get datamaster so you can save a data log of your driving info