Jessejames7575

Has long tubes. X-pipe and tune. Been like this for a year and about 20k. I've changed 3 oxygen sensors. Recently started white smoking a small amount every now and then. But not constant. Put in wiestech plugs and oil catch can. And few weeks ago. Started missing and took it to shop. Code showed number 2 or 3 cylinder coil pack and rear oxygen sensor on same side as coil. So I had the coil changed. And it ran fine after resetting. Then week later same thing. Take it back to shop. It says same coil pack. So they put another on and same thing. So they switch coil to another cylinder. And coil pack was good. Plug was fouled. But no oil on plug or visually in cylinder. So did a compression test. And they said all cylinders within specs. So they just reset engine light again and car did fine for another week. Til yesterday. Any idea what could b causing this. Any help is greatly appreciated

INS1GNIA

Wow, you let it go on for that long . Was the car tuned before or after the headers?

Jessejames7575

No no no. I meant it's had tune and long tubes for that long. Had so that done at same time.

Mr. Lin

how's your coolant looking? isn't white smoke usually steam? head bolts?

Jessejames7575

coolant is fine. Nothing mixed. Never overheated did just read something about valve seals. Could that b possible?

QWKSNKE

Injector sticking open

OR

Nick in the harness that leads to that cylinder coil