ok, all the gauges work. idles a lil rough some days. but if i'm tearing tho some twisties on the accl/decl thats when i hear the back fire. or if i'm revin it up just sitting there it pops bout 3 to 5 times. while i'm moving it only does it once.

the shutter valve was replaced last year.

 

Make sure it is still operating. Sometimes the actual shaft in the manifold that attaches to the shutter valve breaks.

 

hmmmm..the last time the shutter valve wasn't working it was just causing her to die when i came to a stop. but how do i check to see if its still working?