bigjayzway Posted July 2, 2005 Report Share Posted July 2, 2005 I always run 93 or better octane in my 94 Deville, with the 4.9 engine. I thaught I had got some bad gas, but 4 tanks later.....she is still pinging. When I put a slight load on it, going up hill, or passing without nailing it...I wonder if you can adjust the timing in this motor? Oh yeah, I am on the 4th GM O2 sensor now, and I am getting the code for it again!!! Life is too short to grow up! Link to comment Share on other sites More sharing options...
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