Hey guys. I just drove from Colorado to Houston and when I got here my car started misfiring at idle. It is fine over 1000 rpm, but otherwise it misfires about every 2 seconds. I am not throwing any do you codes.

What do you guys think the problem is. I was guessing plugs.

 

Does it die at idle?? I had a big issue with that and had to replace all my coils and plugs.... Then I got the same issue and had to replace the MAS.... Either way it was a good $300-$500..... What else is goin on?? Gas mileage poor?? Power loss??? or is it fine after 1000k RPM????

 

I doesn't stall or anything and gas millage has been around 28 mpg

 

If you don't have a check engine light then it's either plugs or a lazy or clogged fuel injector.

Check your plugs, make sure your running NGK Platinum plugs and do a fuel system clean up. Clean your throttle body and run a bottle of Techron through your gas tank. Drive it hard with the cleaner in the tank. You might also try to cleaning the intake while the car is running so you get deep into the intake manifold right to the intake valves. This procedure usually makes a huge difference in idle stability. Also clean your IACV valve as well.

Also check your PCV valve and make sure it moves freely. Just remove it and clean it with intake cleaner for a quick fix/clean up.