Ok, so first of all my car sucks gas like a fat kid drinks a shake and its pissing me off. My motor is miss firing after i put in a newer knock sensor, or like new went to the salvage and got one that wasn't cracked and replaced it because I got a code saying bad KS, put the one I got in and its still saying bad KS. Went back to salvage replaced all 3 front coil packs and now its miss firing bad. so basically i got a bunch of salvage coil packs and KS in my motor trying to fix it and now its running worse. I want to buy all new Plugs and coil packs but coil packs run $70 each and a new KS is around $100 for a new OEM. I figured I would get someone elses input since every time I ask weird questions on here you guys always know what to do. Thank's!

 

What do the plugs look like?
are they pitch black?
and have you checked the condition of the MAF sensor? A good check is to grab a GOOD wiring diagram to the car and check for all the equipment attached to the KS circuit.

 

Never buy a knock sensor from a scrapyard. It doesn't need to be cracked for it to be useless. Unless you carry a multimeter along with you and test it before you take it, it's not worth the hassle. Knock sensors can be purchased online relatively cheap.

If you swapped the coils, and it runs like $hit, it's probably becuase you put bad coils on it. Run your codes, and find out which cylinders are missing, and replace those coils.

If you're not having any stalling issues, and you can rev past 3000RPM, then don't worry about the MAF.

 

I think Im going to put my original coils packs on, put on all new spark plugs, which looked fine, buy a new KS and get all new wires for the KS. I think thats my best bet, it revs past 3k fine so i dont thinks its the maf. thanks guys!

 

FSM in my sig, download it.

Post Codes please.

 

they tell me bad KS and p1447 and p1448

 

Amazon.com has all 6 coils for 120 and a ks for 18.

 

bad KS wont cause misfiring. Bad coils will. Replace the coils with OEM replacements. replace KS with ebay KS.

 

Change spark plugs and coil packs. If your car sucking gas like crazy, check the MAF sensor too.

 

+1 for oem coils....just had a set of chinese ebay coils go bad after <5000 mi. Caused ignition signal interrupt code.

 

Double check all your grounds. Clean all sensor, injector and coil plugs/sockets by soaking in vinegar for 5 minutes, blow dry with compressed air after rinsing with hot water. I apply a small dab dielectric grease. Check key on voltage at ecu. If it's not within a tenth volt or so of battery you have ground/corrosion issues. I just went through all this and she runs sweet again. Hopefully yours will too.

 

good advice guys

 

I don't trust any of that crap, OEM Junkyard Coils.

Ebay KS, Junkyard Coils, theres a thread floating around here that has a solution for random misfires with 3M Super 88 Electrical Tape, Notice I specified which tape to use, because the thread does not. The reason; High Heat.

If you do plugs, NGK Platinum plugs ONLY, DO NOT SUBSTITUTE.

Not surprising.

I approve this message. Except I just use Electronic Contact Cleaner on most everything.

Also, a good start on sensors to clean, MAF, CamPS, Upper and Lower CrankPS, Careful not to scratch these, they operate as magnets, if they have any imperfections they can cause issues; same with any metal fragments that may be stuck to them.

Make sure you get the grounds on the Intake Manifold. Also Add one to the bell housing of your transmission to the battery.