First I'll start off by saying, I did an extensive search on setting the timing on my car with no results. This leads me to believe it's computer contolled. So, I have two questions:
1995 Intrepid, 3.3L (not flex fuel), 215,000 miles.... and I might add I've maintained it very well since I got the car at 133k miles...... and I have a fair knowledge concerning auto repair/maintenance. I have and have had a O2 sensor fault for some time. A new sensor didn't fix it.How can I adjust the timing on my Intrepid?
The reason I ask it I have picked up a little detonation when I load the engine in 3rd & 4th gear, like climbing a steep hill. Wires, Champions plugs with the correct gap, distributor cap and rotor have all been changed within about 10-15k miles. The engine and tranny seem to be in excellent condition, oil has always been Valvoline 10w30 every 3k-4k miles (since I bought it).
Where do I go from here? I thought about using a colder plug, higher octane gas doesn't seem to help much if at all.... Maybe a cooler thermostat? although it doesn't seem to matter the temp outside winter/ summer.
Suggestions?