Hello everyone. I'm new to the forum and I've tried to search for this relating issue without any success, so i'm sorry if this is repetitive.
I have a 2005 9-3 Aero Convertible (aprox. 96,000 miles), and I noticed about a week ago that it has an oil leak (which has likely been there for months). White smoke comes out from behind the engine only while in idle (NEVER while driving).
I've started to get pretty heavy misfires too, I scanned the ECM and found that cylinder 1 and 3 seems to be the worst, and I have error code P0300 (Random/multiple Cylinder misfire detected), but the MIL is off. The misfires occur when accelerating hard, or when the engine is in idle and cold. Other than that, it starts up just fine without struggling.
With my OBD II scanner I've also found that O2 sensor 1 fluctuates a LOT (from 0.05-0.75V) while driving, whereas O2 sensor 2 seems to be pretty stable at around 0.65V. I'm not sure if that's relating to my issue, just figured that any detail will help.
The ignition coils are about 15 months old, and the spark plugs were changed almost a year and a half ago, which back then solved my misfiring issue.
Does anyone have any clue what the issue may be? I fear a leaking head gasket, but would like to hear anyone else's opinion before taking it to the mechanic... Except for the periodic misfires the engine really runs amazing for its age, so i'd hate to see the car go to waste. Thank you for any help at all!
I have a 2005 9-3 Aero Convertible (aprox. 96,000 miles), and I noticed about a week ago that it has an oil leak (which has likely been there for months). White smoke comes out from behind the engine only while in idle (NEVER while driving).
I've started to get pretty heavy misfires too, I scanned the ECM and found that cylinder 1 and 3 seems to be the worst, and I have error code P0300 (Random/multiple Cylinder misfire detected), but the MIL is off. The misfires occur when accelerating hard, or when the engine is in idle and cold. Other than that, it starts up just fine without struggling.
With my OBD II scanner I've also found that O2 sensor 1 fluctuates a LOT (from 0.05-0.75V) while driving, whereas O2 sensor 2 seems to be pretty stable at around 0.65V. I'm not sure if that's relating to my issue, just figured that any detail will help.
The ignition coils are about 15 months old, and the spark plugs were changed almost a year and a half ago, which back then solved my misfiring issue.
Does anyone have any clue what the issue may be? I fear a leaking head gasket, but would like to hear anyone else's opinion before taking it to the mechanic... Except for the periodic misfires the engine really runs amazing for its age, so i'd hate to see the car go to waste. Thank you for any help at all!