Hi,
I drive a 2005 Dodge Grand Caravan SXT 3.8L I am concerned about the engine detonation (pinging), that was very heavy in summer, especially with A/C on, and sometimes it can be heard even during cold weather.
Recently I've purchased an OBDII -> USB adaptor to hook up the laptop and see the diagnostic data.
I discovered that the ignition advance is about 20 to 24 degrees when idling, and it goes up to 40 to 50 degrees when revving up to 2000 RPM (in neutral, engine warmed up to norm). I believe that such values are way too high, and premature spark can easily be the reason for detonation.
Could somebody advise what are the correct ignition advance values for such conditions ? Maybe any ideas how to troubleshoot further ?
Thanks a lot !! Val