[SUZZOOK]

Hey everyone, this is my first post and it's regarding my 97 sierra.

When in wet conditions, or sometimes not, when the clutch is in at the traffic lights (for example) my sierra will either stall or bog down to 200rmp and bump up to 1,100rpm recurring and is incredibly ANNOYING!. Other than this, it drives perfectly when its driving in gear.

As well as this, it backfires a lot when engine braking, could this be cause by no muffler and timing issues?

ANY help is greatly appreciated!