ATS GM Knock Sensor

**Tecker184** · 09-08-2011

Will your GM knock sensor kit work on a gen4 3sgte?

**BabyBear** · 09-08-2011

Yes, it should. Depending on what connector comes on that kit though, you may have to cut it and get the newer style knock connector plug thingamajig on it unless you plan on using the vamp connector it tells you to. I wouldn't run it though. I had one on my MR2 and while it didn't throw a CEL, it seemed to pull a little bit of timing all of the time. I switched back to a stock one and couldn't have been happier.

**Tecker184** · 09-08-2011

Well i have two knock sensors they both must be bad. I have changed the wire, the plug that goes into the ecu and the ecu, still have a check engine light. I really don't know were to start finding an oem one.

**Luni** · 09-08-2011

Knock sensor tuning is determined by bore/stroke of the engine, not material or number of cylinders. All 3SGTEs are the same.

Theres a guy over at mr2oc names CJMR2T you can hit up, he has knock sensors and pigtails for sale for like 30 bucks shipped. Thats the way Id go with it. 90 percent of the time with a code 52 either its your sensor, or the shielded part of the wire that gets damaged. Run a new wire, ground it either at the block side, or at the ECU side, make your connections pretty and it will most likely go away.

**Tecker184** · 09-09-2011

I sent him a message hope he can hook me up. I pulled my other knock sensor from my other engine that i ran for a year with no issues. So figured it had to be wireing. But i ran a good wire from my spare harness still nothing. I guess the sensor must have gotten damged when i removed the engine. I just really want this fixed its frustrating, im considering parting the car out.

**BabyBear** · 09-09-2011

Me and Luni had to rewire the knock sensor wire from the ECU to the sensor on my(now his) MR2 like 3 times before it finally worked. I don't think we got the shielding far enough down the first 2 times.

**Luni** · 09-09-2011

Originally Posted by Tecker184

I sent him a message hope he can hook me up. I pulled my other knock sensor from my other engine that i ran for a year with no issues. So figured it had to be wireing. But i ran a good wire from my spare harness still nothing. I guess the sensor must have gotten damged when i removed the engine. I just really want this fixed its frustrating, im considering parting the car out.

Did you properly ground the shielded portion of the wire like youre supposed to? Most importantly, you CANNOT ground both sides of the shielding. You cut the shielding on one side and you ground it to the other.