986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - Not a good day for my 986S 2001. Smoke and engine dead

thom4782 · 11-02-2013, 01:07 PM

P0304 code means: cylinder 4 misfire damaging to the catalytic converter. My quick search suggests that a bad coil pack can cause trigger this code. Not sure how that would cause / explain smoke. If you want to run a quick check for internal damage, inspect the oil filter for metal debris. Hopefully you don't see any and have reason to hope.

PS: a failed air oil separator can create huge smokescreen behind your car.

11-02-2013, 01:07 PM	#4
thom4782 Registered User Join Date: Sep 2010 Location: Foster City CA Posts: 1,099	P0304 code means: cylinder 4 misfire damaging to the catalytic converter. My quick search suggests that a bad coil pack can cause trigger this code. Not sure how that would cause / explain smoke. If you want to run a quick check for internal damage, inspect the oil filter for metal debris. Hopefully you don't see any and have reason to hope. PS: a failed air oil separator can create huge smokescreen behind your car. Last edited by thom4782; 11-02-2013 at 01:10 PM.