My ZZ4 engine still has that pinging issue during mid throttle situations... i've given up with a mechanical distributor and now using a total electronic one by the name of progressive ignition, even with conservative timings, i still have the problem even when using 93octane(w/ that dreaded 10% ethenal), unless the ethenal is the problem and need to find straight 93octane, im using GM recomended spark plugs(MR43LTS - .040gap) and the carburator(SA770) is tuned correctly, im at a loss.
A couple of trusted mechanics i've talked to say its definately the gas after giving them full detail of the issue at hand, im not lQQking to use any type of pure race fuel, so its the octane booster im after to try out, but i am unsure which one to try since i've never had to use that stuff before.... any suggestions on which brand?
Thanks
A couple of trusted mechanics i've talked to say its definately the gas after giving them full detail of the issue at hand, im not lQQking to use any type of pure race fuel, so its the octane booster im after to try out, but i am unsure which one to try since i've never had to use that stuff before.... any suggestions on which brand?
Thanks