Hey guys or never had to register or post before because of all the info available here. I've searched for days looking for similar problems to mine now I'm stumped. About a week ago I was started get a misfire under Wot around 3 to 4k it hesitates and I hear popping coming from the cat. No CEL at all. I put in new plugs (ngk) hoping that would solve it but still had the same issues. Was thinking a bad coil but I would think that would throw a misfire code? Scanned for codes and got 0304- knock sensor. Everything I've read says the knock sensor won't cause misfires it more cases low rpm hesitation and bad gas mileage. Could a bad knock sensor cause these issues? I don't want to just start throwing parts at the car hoping something will work so any help would be greatly appreciated. Thanks

 

The most noticeable and most typical symptom of a failed/failing KS is poor acceleration, not misfire.

Regardless of your lack of DTC, first thing I'd probably check would be my COPs and boots for damage, dirt and corrosion.

 

I have a similar problem just at low speeds or idle Matta fact today I shifted from drive to park and my car shut off I also have a knock sensor code too

 

i am having the same issue i got codes for egr trans range sensor and knock sensor i replaced my maf (made no diffrence) i check coils all mine are good same as injectors i dont get it plus my caar rev limits at 4500 should be 6500

 

What's your EGR code.

 

p1400 egr/evap

 

I have same code, same problem, replaced the egrc solenoid with used off ebay, worked for 3 days and niw its back.

 

idk what else to do im getting tired of trying to fix it it is deffinitly a money pit

 

Misfire is a coil pack most likely.

 

I ordered a knock sensor and new harness because I know there's something going on there. As far as the misfire could a coil pack be causing a misfire and still not throw a code?

 

Yes, definitely. Happened to me several times. Swap coilpacks with a buddy, if possible.

IMO, you're barking up the wrong tree thinking it's the KS. More than likely, it's the coilpack(s).

 

can anyone watch my video of my operational data please idk whats normal


might find my problem

 

Update: Misfire was definitely a coil pack, replaced it with a cheap aftermarket coil a friend had and immediately got p1320. I know this is a common problem with aftermarket coils but the car is running great. Is there any harm in driving this way for a short period of time or could this code cause any damage?

 

The code alone won't cause any damage. I'd clear the code and see if it comes back.