I just bought a 99 v6 3.8 with 86000 mile. The owner said it needed a tune up. Well come to find out it needs a lot more. We have put new plugs,wires, fuel filter, an bank 2 sensor 1 o2 sensor. It is sluggish. When u go to speed up it runs bad. An it running like a car on rich gas. The only code that came up after all that was p0300 cylinder 2. So we replaced the injecter. Still throwing the code out of cylinder 2. When I got the plugs they sold me ngk. Will that make the car run bad??? I bought new delco plugs at autozone. Someone please help, my other half wants to sell MY car. We r running out of money?

 

A p0300 code isn't cylinder 2 its a random cylinder missfire I'd look into the coils since you already did plugs and wires (there on right right) you can get them tested at autozone

 

Yeah What Basic said. I have been threw this. I would bet money on one of the coils. They are a common failure item. When I got my 99 it had one oem coil and two different aftermarket coils in it. When I replaced my engine the used engine I bought had two aftermarket coils on it. I guy I work with has a 2002 and has had to replace 2 coils on it.
So out of 3 3.8 camaros that I am personally aware of 6 out of the 9 original coils failed.

 

But you still could have plugged injectors. By the way, did you replace the one injector with an original OEM type? If you used an aftermarket, it can mess up your left to right bank air/fuel balance, as it may not necessarily flow at exactly the same rate as the OEM. I've been through this, and learned mix & match is a bad idea.

 

We did replace the # 2 injector. It was burnt out. When they hooked the car up it doing the p0300 code an they said its coming from cylinder 2. Should I change the plugs again to the delco?? We've done a lot n it seems to help but then goes back to the way it was.

 

id look into the coils first

 

The reason I brought up the aftermarket injector is because I had chased a PO300 random misfire, narrowed it down to which cylinder it was, and that it was the injector causing it. Replacing the injector made the engine run worse, not better. So I soaked the old injector in carb cleaner for a while, replaced it back in place of the aftermarket one, and the engine ran like a top. So don't automatically assume you fixed the bad injector problem with an aftermarket one.

 

They threw the old injector way? So what should I do?

 

They old injector was all burnt out. It was a oe I put back in. Should I soak the others in carb cleaner?

 

I almost got new coils but they said to get the ngk spark plugs out of the car. An he also said it was cylinder 2 that was misfiring an if it was the coil then it would show 2 cylinders. I'm so lost. You guys r great. Everyone keeps saying it could be the compression? At 86000 miles???