Updating 98 Knock Sensors?
TECH Apprentice
Joined: Apr 2002
Posts: 373
Likes: 0
From: Hickory, NC
Zapp,
'98 models are prone to knock compared to the later years. To fix this problem I had Nick Williams Performance install new 2002 ZO6 knock sensors on my car prior to him tuning it with HP Tuners. With the tune with my QTP's I show absolutely no knock at all anymore. Just go to the Scoggin Dickey or GMPP website and look for the part number. Each sensor was around $50...$100 for both at the time.
'98 models are prone to knock compared to the later years. To fix this problem I had Nick Williams Performance install new 2002 ZO6 knock sensors on my car prior to him tuning it with HP Tuners. With the tune with my QTP's I show absolutely no knock at all anymore. Just go to the Scoggin Dickey or GMPP website and look for the part number. Each sensor was around $50...$100 for both at the time.
Originally Posted by voda1
Did your knock sensor have a locating tab for the harness connector or just a smooth round plastic top?
I have not removed them yet, is the only difference going to be the plug connector? Are they physically the same as far as mounting?
Originally Posted by zapp168
I have not removed them yet, is the only difference going to be the plug connector? Are they physically the same as far as mounting?
2. Yes. The valley cover is the same from 98 thru 02.
During the 98 model year GM went from the 1st design to 2nd design knock sensor. Your car may have the newer knock sensors. Last September GM did change the part number on the 2nd design knock sensor.
Last week I did see a 98Vette with the 1st des sensors.
It would be interesting to see the stock tune files between identical year cars with same options with only difference being knock sensors, to see what was changed in knock tables. Can't jump up to 99 because the computer changed.
Originally Posted by voda1
1. Yes. Requires different connector/harness.
2. Yes. The valley cover is the same from 98 thru 02.
During the 98 model year GM went from the 1st design to 2nd design knock sensor. Your car may have the newer knock sensors. Last September GM did change the part number on the 2nd design knock sensor.
Last week I did see a 98Vette with the 1st des sensors.
It would be interesting to see the stock tune files between identical year cars with same options with only difference being knock sensors, to see what was changed in knock tables. Can't jump up to 99 because the computer changed.
2. Yes. The valley cover is the same from 98 thru 02.
During the 98 model year GM went from the 1st design to 2nd design knock sensor. Your car may have the newer knock sensors. Last September GM did change the part number on the 2nd design knock sensor.
Last week I did see a 98Vette with the 1st des sensors.
It would be interesting to see the stock tune files between identical year cars with same options with only difference being knock sensors, to see what was changed in knock tables. Can't jump up to 99 because the computer changed.
Originally Posted by zapp168
What do you mean can't jump up to 99? You mean compare the tune?
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Hey I updated mine mostly because the dealer only had the new knock sensors. I had the old ones that had a tab on them and when I went to remove one the tab broke from the heat on the plastic. It retains the connection so it is pretty much required. The connection was simple to replace as the harness just plugs into where you unplug the old. I never knew there was a good reason to do it I just figured updating would help if I blew another knock sensor in the future.
