Had my ECM changed this week and still have pre-ignition ping. Was hoping it would go away with new ECM. Question is does yours ping?
Have 2002 and on acceleration get bad engine ping. First noticed it on acceleration in first and second around 4,000 RPM. Less noticable under 2,500 RPM. To give you an idea of the ping, at 70 MPH with radio on outside speakers and volume at 26, twisting the throttle moderately to pass car sounds like 15 rattlesnakes in your helmet.
Tried going from 87 to 89 octane gas with not change. Didn't try the 93 octane yet.
Have 2002 and on acceleration get bad engine ping. First noticed it on acceleration in first and second around 4,000 RPM. Less noticable under 2,500 RPM. To give you an idea of the ping, at 70 MPH with radio on outside speakers and volume at 26, twisting the throttle moderately to pass car sounds like 15 rattlesnakes in your helmet.
Tried going from 87 to 89 octane gas with not change. Didn't try the 93 octane yet.