Mach 1 mach 1 missfires

[Josh03mach]

I'm stumped. I have an 03 mach 1 with 28k miles. it runs good most of the time but when coming to a stop it sometime drops down to 500 rpm or lower and then jumps back up but it has never actually died. hooked up my diablo and it threw a few codes. misfire at startup, misfire on cylinder 3, and cylinder 5. and it said bank 1 was lean. Again NEVER does it when driving just when coming to a stop. What could be causing this?

 

[mach1yellow]

did the check engine light come on and flash? did you try swaping coils to change the cylinder misfire?

 

[rcode99]

Post this question on mach1registry.org. You may have to sign up but if you have a Mach, that's what this site is all about. Could be dirty MAF screen, fuel filter...a number of things that are beyond my abilities.