RB25det Misfire

[jms19delta]

What could be causing my rb to misfire at idle? I changed the plugs but no luck. When I drive the car, there is no misfire that I can tell. The motor is stock other than a fmic and full 3in exhaust. Any ideas? I am thinking that I will check the coil packs next. I tried searching but it seems that most people have misfires in the higher rpm's.

[Carl H]

you can try unplugging coils and seeing if it changes exhaust note...then swap them around to see if a particular coil is bad.does it missfire when dead cold or only after warm up, if so then that would sudgest the ignitor.

[jms19delta]

I tried unplugging coils....but nothing really changed the idle. It does it while cold and after warmed up. Like I said though, it boosts great and everything...just idles rough.

[Carl H]

when was the last time the plugs were changed?

[jms19delta]

I changed them today...the plugs that came out appeared to be fine.

[jms19delta]

the motor is a series 2 also.

[scarboroughdub]

you can also try unpluging the injectors one by one and listen to exhaust note change.

[jms19delta]

I noticed yesterday, that it only does it after the car has warmed up. Coils? I need to go check the resistance on the coils. Any orther ideas or suggestions?