[KillerKaprice]

My Kaprice has a 97 Z28 Lt1 with flowtech afterburner headers. and I only get knock sensor codes while on the highway. in town it never goes off. someone suggested Lt4 knock sensors. BTW both sensors are brand new. I've been a mechanic for the last 6 years. i can clear it and change the sensor and clear and its fine. As soon as i do a long highway drive it comes on. and it seems i can get it to shut off by getting on it for a second and get off the throttle completely and let idle down for a moment. any help would be appreciated. Thanks Josh

 

[Mean SS]

are you using 94-95 knock sensors ?

 

[KillerKaprice]

are you using 94-95 knock sensors ?

yeah and my computer is tuned as well. I'm thinking it's the headers doing it. All i can think of? I'm at a loss I really don't want to change sensors again. But it is very possible the new sensor I put in is bad. working as a mechanic for the past 6 years has shown me that a bad sensor from the get go is a big possibility. IDK I'm at a loss.

 

[KillerKaprice]

ALSO the car runs fine the whole time. only thing I have ever had happened is sometimes driving at low throttle especially taking off from idle it will chug and cough a little but it doesn't seem to do it after it warms up. and if I get on it and bring it up to 2 grand it goes away.

 

[Mean SS]

use only AC Delco sensors and you might want to try the LT4 "knock module" it's not a knock sensor

 

[KillerKaprice]

use only AC Delco sensors and you might want to try the LT4 "knock module" it's not a knock sensor

cool I'll check out the AC delco sensor I'll call fairway chevrolet. and where Is the module located I honestly don't know where it is. lol been doing this for so long and I still learn something new everyday. thanks ahead of time Mean SS

 

[Mean SS]

the module is in the bottom of PCM under a small cover

 

[Mr pogo]

get ready for sticker shock on the km cwm5

 

[KillerKaprice]

the module is in the bottom of PCM under a small cover

oh ok lol I know what your talking about know I've changed one but it was on an S-10 but its been a while it's that door with the 2 screws if I remember. Thanks again bro I appreciate it a lot!

 

[KillerKaprice]

get ready for sticker shock on the km cwm5

???? im confused or do you mean the knock module is uber expensive?

 

[Mr pogo]

$76 + shipping at summit.

 

[KillerKaprice]

$76 + shipping at summit.

holy crap! maybe I can get a better wholesale price through the shop I work for. damn I hope so

 

[Mean SS]

the PCM will need a retune for the LT4 knock module

 

[Mr pogo]

the PCM will need a retune for the LT4 knock module

umm why?
I could see tuning out the ks which makes the km moot.