Date: 24 Oct 1998 02:40:32 GMT From: "Cooper Valentine" <tloveit1nopsame.rr.com> Subject: Re: Knock Detection
Did you shave th head to get higher compression????? If so, feel free to suefor damages whom ever gave you that advice. The Knock sensor is part of a complex system that prevents engine detonation by stopping inaudible knock by dumping boost and retarding spark. Turbo engines need low compression to operate with a realistic "fudge factor" to account for realworld driving conditions. If you raised your compression by more than 5% you will loose boost and timing advance. woof Kirk Johnson <kirknopsamguy.com> wrote in article <36306F69.EF27A53Enopsamguy.com>... > I've recently did a head gasket job on my '88 spg. I had the head > worked, shaved and the valves done. After the first test drive, I found > that I had no boost. After checking through everything in the system, I > found that the knock detector is detecting knock. If I unbolt it from > the block and move it out of the way, I get full boost back. Now when I > took the cams and the timing chain apart, I did not mark the chain or > the gears. The haynes manual said to assure that the mark on the cams > lines up with the "v" on the cam bearing, when #1 is at tdc. Which it > was. > > I know the knock sensor it good. I tested on my other car, and it works > normally. > > Now, if I am off by one tooth on the timing chain, would this cause > knock? If there a process to get the chain in the correct location? What > may cause knock detection? > > Any help would be appreciated. > > Thanks, Kirk > >
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