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What does pinging sound like in a rotary engine. I hear sone strange rattling coming from the engine in my 93 Rex and it sounds worse in first gear. I never heard it before and wondering if it was pinging. It idles fine and starts easy. any help is appreciated.
Pinging is the same thing as detonation. Detonation sounds like popcorn(from what I've heard). It normally isn't constant. Just a few good pops, and then your engine is gone. Try putting some ATF in the engine. Carbon deposits can make the engine have a pinging noise(according to the shop manual).
Automatic transmission fluid. You put it in your sparkplug holes and then crank the engine up. It will smoke like hell, but clean the engine quite well. You could also get some professional, engine cleaning stuff, but why bother.