RPMs Drop to Zero While Driving

jay · Post by **jay** » October 21st, 2006, 8:47 pm

92 MX3 driving along fine then RPM's drop to ZERO as I pull over sometimes they jump back up and car resumes as if nothing happened- othertimes car stops and is hard to start. Mechanic tested for vacuum leaks and can get no resistance on JE-50 VAF. Is it the VAF or should I be looking at HEI module as culprit?

tehbrookzorz · Post by **tehbrookzorz** » October 21st, 2006, 9:26 pm

This sounds like an intermittent issue, a bad VAF would seem to me to be more consistant one. Do you have any more information available? Codes?

max kl · Post by **max kl** » October 22nd, 2006, 12:16 am

if you are sayin the rpms cut out and engine dies. than yes you need a distrubtor or the hei mod.
if the engine dies and the tach drops slowly as engine stops spinning than it is fuel / engine managment related.