Hi guys, need some advice. Trying to figure out what's causing this old reliable 02MCS to act up this past week. It's got 44k mi & lone K&N Typhoon CAI mod on it. Regularly serviced (every 5k)& well taken care of. Plugs, coil, wires,harmonic balancer are all stock & never changed yet though. Engine has never used up oil, never had to top it.
These are the issues I've noticed:
!. It starts instantly every morning but stumbles a coupla times before idle stabilizes as temp rises.
2. Random DSC & SES PO300 fault code but car runs smooth upon reaching operating temp
3. After car sits 5-10mins, it takes a coupla cranks longer to start w/ a slight stench of fuel=>rich. Always starts on 1st try though. Changed the coolant temp sensor on cylinder head, new belt, recharged the K&N CAI & cleaned the corroded #3 coil a coupla days ago, no improvement detected.
Changed both strut mounts too. Huge difference there!
4. At operating temp, idle is stable @ 800. Random faint pop & burble can be sensed.
Need your inputs on possible causes & where I should start.
-Bad gas? Been running ethanol free premium gas. Might be a bad fill up? I'm trying to consume this tank & refill from another station next.
-Signs of failing harmonic damper? Don't hear noises & visually, it still looks ok. Which is best? PRW or ATI?
-plugs, coil, wires?
Hope to get it back to how it used to be. I'm crossing my fingers this is nothing serious. Maybe Khuevo could chime in? This forum has kept this mini in tip top shape all these years & I'm overly appreciative. Thanks, guys!
Happy motorin' & more power!