If your engine is pinging on regular gas you have to check the following: Timing, mechanical AND vacuum advance Temperature, if the engine runs too hot it will ping Spark plugs, if too hot a heat range they will glow Vacuum leaks, if large they will lean out the mixture Carbon deposits Bad ignition wires, if they break down the engine will misfire and sound like detonation. It is also possible, if you are not using a branded gas, that they are not giving you 87 octane or there could be water in the fuel. Just some things to look at. David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxxxxxx, Jake Kamphoefner <jakekamp@xxxx> wrote: > > Chuck, > > Mine does the same thing! Never have figured out why. The plugs, wires and cap are a few years old, but never seem bad to me. I had my car at Grady's in March and Pat checked the fuel pressures, mixture, etc. and still I have have pinging on low octane gas. It's not > DCO To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/