Rough Idle!

[jackcruiser]

Hi
When I bought my PT Cruiser turbo GT it ran rough at idle as well
The previous owner had installed custom wires , a coil pack and irdium plugs
I replaced everything back to stock and run smooth like new
These engines seem to like OEM parts

[rockandroller]

belated report... I took it in a few weeks ago to have the idle looked at, and half a day later picked it up - running perfect! No rough idle whatsoever. My mechanic was on his way out of town on some urgent errand, so didn't explain what he fixed. All he said was "took it all apart and put it back together again" or something to that effect. Gonna ask him if can elaborate next time I bring it for an oil change~

Still running perfectly now, and not a single P0304 code since

[rockandroller]

Got confirmation finally - my issue was solved by replacing (reseating?) the one INJECTOR

*(could have been the "lower gasket (intake to head) blocking the injector port" issue, not sure)