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98 knock sensor question

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Old 03-29-2007, 07:45 PM
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Default 98 knock sensor question

Do the 98 ls1 knock sensors really show 3-4 degrees retard all the time?
Old 03-29-2007, 08:19 PM
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is this just a myth?
Old 03-29-2007, 11:40 PM
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reason i ask is im gonna be doing an intake swap and was wondering if i was already there if i should just go ahead and do it.
Old 03-30-2007, 07:32 AM
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I would change 'em. I was constantly getting 4* at the track, swapped them out, and it dropped dramatically. I also went in and edited the KS tables to resemble the 2002 tables.

My friend went from 12.0 to consistant 11.7's after his were swapped from his '98 lol. You also have to get a new little harness for them, as they have different clips on the new style sensors.
Old 03-30-2007, 05:13 PM
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part numbers for the sensors and harness?
Old 03-30-2007, 06:04 PM
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Updated sensors: 12589867
Updated harness: 12601822

Old 03-30-2007, 06:10 PM
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so the 98 knock sensor harness gets un pluged from the main harness

the new knock sensor harness gets pluged in the the main harness and also to the sensors
Old 03-30-2007, 06:14 PM
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Old 03-30-2007, 06:29 PM
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Originally Posted by bad6as
so the 98 knock sensor harness gets un pluged from the main harness

the new knock sensor harness gets pluged in the the main harness and also to the sensors
Yep. Those 2 wires heading toward the back of the motor swing around and there's a weathertight connector just out of view. You simply unplug the old one and clip on the new one. New knock sensors just screw in.

Familiarize youself with how the new harness unclips from the new knock sensors. It took me 2 flathead screwdrivers and a buddy to get mine loose. You have to depress both sides and pull up at the same time, it's hard when they're down in that hole and your fat fingers won't fit.
Old 03-30-2007, 06:30 PM
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well you could cut the wires and i guess you use a socket and just un screw them?
Old 03-30-2007, 06:33 PM
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Originally Posted by bad6as
well you could cut the wires and i guess you use a socket and just un screw them?
I think if the socket was big enough to go over the clips, it would be too big to fit the hex portion of the sensor. It's not very hard, just kinda tricky to get the clips popped off. Maybe I was doing it wrong, I've been wrong before lol.
Old 03-30-2007, 06:35 PM
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yea i just had a brain fart and for got tha the clips would still be on the sensor

so they just screw out and screw back in
Old 03-30-2007, 06:38 PM
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Originally Posted by bad6as
yea i just had a brain fart and for got tha the clips would still be on the sensor

so they just screw out and screw back in
Yep. 15 ft-lbs. A 7/8" socket will fit them if you don't have a big enough metric one.
Old 03-31-2007, 11:34 AM
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Originally Posted by TheBlurLS1
Yep. Those 2 wires heading toward the back of the motor swing around and there's a weathertight connector just out of view. You simply unplug the old one and clip on the new one. New knock sensors just screw in.

Familiarize youself with how the new harness unclips from the new knock sensors. It took me 2 flathead screwdrivers and a buddy to get mine loose. You have to depress both sides and pull up at the same time, it's hard when they're down in that hole and your fat fingers won't fit.
This is good advice, lol I SHATTERED the clip from my old harness trying to unclip it with a screwdriver, lucky for me I had a new harness ready for it anyway
Old 06-25-2007, 07:02 PM
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definitley my next addition is a new harness and knock sensors
Old 06-26-2007, 09:11 AM
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definetely worth it, i did it and am very happy
Old 06-26-2007, 12:29 PM
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use a pair of needle nose pliers, and squeeze the connectors, were they are ovaled. If you look at them, they are circular, but their are two bulges on each side of the circle, that is where you want to squeeze. just apply a little pressure, and walk the connector up wards off the sensor.
Old 06-29-2007, 08:31 AM
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is this the old ones? Can anyone tell in this pic?
Old 06-29-2007, 03:45 PM
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did you buy new sensors all ready? what pn did you use? and i was told the newer harness had to be spliced in, that true?
Old 07-01-2007, 02:45 PM
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Originally Posted by TheBlurLS1
Updated sensors: 12589867
Updated harness: 12601822


Hi

I assume I will need 2 sensors and 1 harness? Or does each sensor have its own harness? Thanks.



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