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.

 

maybe your motor mounts are going out?

 

um that was the sound I heard before mine died...find the cause of it! I tried to find out if it was pinging but it was too late

David

PS mine sounded like rattling exhaust shield

 

what happened when it died?

 

Did the sound come from the center of the car behind the dash? I have been getting this sounds above 45 MPH. it was like a snoring sound almost. hopefully it's just a piece of debris somewhere.

 

knocking wouldn't be speed dependent. If you get it above 45 no matter if you are giving gas or not, then it must be something else.

when it dies the idle is really bad, not an unstable one, but really rough. And also you will loose power when you gas it.

David

 

the air pump often makes some crappy noises when it's going bad.... does it make the noise at idle or when it's not in gear? can you pop the hood & rev the engine to reproduce it?

 

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).

 

Whats ATF?

 

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.

 

It only makes the noise during acceleration. I know its not pinging(at least I think) because the engine runs strong and idles normal.