The pinging most likely is being caused by a too rapid mechanical spark advance. I have found that the distributor advances the spark too fast at the midrange - on mine at least. It is not worth fixing in my opinion when higher octane will eliminate the pre-ignition (to calibrate the distributor it takes a distributor set-up machine which is scarcer than the DeLorean). Harold McElraft - 3354 --- In dmcnews@xxxxxxxxxxxxxxx, Jake Kamphoefner <jakekamp@xxxx> wrote: > > Mine does the same thing! Never have figured out why....and still I have have pinging on low octane gas. 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/