- Test drove vehicle and found the idle badly fluctuates while stopped in drive with electrical load or air conditioning load. Performed computer diagnostic test and found cylinder #3 misfiring. Found the #1, #2, and #3 spark plugs are cracked. Replaced all four spark plugs, retested, and found the symptoms still exist. Updated the PCM with current software per technical service bulletin TSB-09-6-2 (9U7A-12A6SU-CDA), retested, and the symptoms still exist. Found the evaporative purge valve is stuck open. Blocked off purge valve and the symptoms still exist. Fuel trim levels are currently withing spec. Intake and exhaust valve timing are within spec. Unable to determine problem at this time.
- UPDATE PCM WITH CURRENT SOFTWARE
THOMAS S. gave our service a 5 star review on 5/28/2019