knock sensor
05-31-2008, 05:37 PM
#1
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Join Date: May 2008
Location: Fort Worthless, Texas
Posts: 99
knock sensor
Where is it? I have a 96 Z28
next question what will happen if i unplug the sensor? what will the car default to?
i have a nasty ticking noise that when at idle and vehicle in netural the timing is retarded 15*. and when i rev to around 1500-2000 rpm it gets retarded even further i saw it peak at 47*!
I figure it is the ticking causing it to pick up a false knock as i have heard of headers doing the same.
I think the ticking noise is my water pump / bearing / something under timing cover area. and im not worried about it as im about to replace that stuff. but i was currious if i unplug the knock sensor if it will retard the timing or if it will advance it closer to where it should be.
next question what will happen if i unplug the sensor? what will the car default to?
i have a nasty ticking noise that when at idle and vehicle in netural the timing is retarded 15*. and when i rev to around 1500-2000 rpm it gets retarded even further i saw it peak at 47*!
I figure it is the ticking causing it to pick up a false knock as i have heard of headers doing the same.
I think the ticking noise is my water pump / bearing / something under timing cover area. and im not worried about it as im about to replace that stuff. but i was currious if i unplug the knock sensor if it will retard the timing or if it will advance it closer to where it should be.
05-31-2008, 06:27 PM
#2
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Join Date: Dec 1969
Location: Little Rock, AR
Posts: 27,709
The sensor is here.
I think you might be mistaken about the timing. It sounds like you are looking at actual timing (which on some scanners is shown as minus degrees (-°) and it should be, because it is always BTDC. If this is the case, you don't really have a problem there.
If you unplug the sensor, you will get a trouble code and the timing will be retarded by maybe 10° or so. That would make any timing problem you have even worse.
I think you might be mistaken about the timing. It sounds like you are looking at actual timing (which on some scanners is shown as minus degrees (-°) and it should be, because it is always BTDC. If this is the case, you don't really have a problem there.
If you unplug the sensor, you will get a trouble code and the timing will be retarded by maybe 10° or so. That would make any timing problem you have even worse.
05-31-2008, 06:30 PM
#3
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Join Date: May 2008
Location: Fort Worthless, Texas
Posts: 99
yes thank you. I did find the sensor actually of the same pic you posted a link for.
ok well it is reading -x* so this is correct then?
what about the -47* i was getting at RPM? still accepable? what kinda range should i be seeing?
ok well it is reading -x* so this is correct then?
what about the -47* i was getting at RPM? still accepable? what kinda range should i be seeing?
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