[Argeo]

Hi, the engine idles fine. When I bring the RPM's up to 2000 or more and then let off the accelerator the rpm's drop quickly to 3 or 400 and then dies. Any one know what this may be a symtom for? Too lean, to rich? Also, when the car idles every 20 secs or so the engine will like slow down and then speed back up to idle of 900. All within a second or two.

Last, since my two great sources of info have conflicting stories of when a engine is running lean or rich, maybe some of you can settle the debate. When a car backfires out of the pipe, is it rich or lean? What does a backfire out of the airbox mean? Does a bouncing RPM guage at idle mean running to rich?

Thanks in advance.