Thread: knock sensor problem??

code for a knock sensor came up. replaced it. engine had very bad lag and ran like crap when you gave it gas. replaced the knock sensor with a new one. had to drain all the coolant and stuff too. still had the same problem. a day later i replaced my plug wires and noticed a bunch of rust on one of the contacts on the coil pack. i cleaned it off and it ran fine again. then 2 days later my knock sensor code comes back and my car runs like crap again but not nearly as bad. i can go WOT with no problem but the throttle response isnt there and acts as if it was no power under light throttle compared to before.

weird problem!! what could it be? something else throwing the knock sensor code or is it a faulty knock sensor?

okay but the throttle response is nice and completly normal from 40% throttle and up. i can use a snapon ethos scanner from school and look at the tps though.


just did the plugs too. ac delco direct replacement gapped to .55

only mods are a cai. otherwise stock and this problem happened after i put the cai on but it was fine for a couple days and didnt happen right away so i dont think that would cause it? if it doesnt have response at lower throttle but at higher throttle its great, it probly isnt a fuel problem? it could be a lot of things though

Originally Posted by BillBoost37

A knock sensor code isn't going to set from other items typically, unless we are talking about a pcm.

What is the code you keep getting?
What did you torque the new sensor in ft lbs?

i couldnt get a torque wrench in there or even a ratchet. the only thing i could do is use a pipe wrench crows foot with an extension