I have an 84 power ram 50 2.6 and have the weber install with an aftermarket mechanical fuel pump. It deiseled until I put a 5 dollar fuel regulator set to 2 1/2 pounds as the weber instructions called for 2. The deiseling dropped a good 60% and now only happens after I sit in tacoma WA traffic and then shut it off at school. MIght just be caused from the extra fuel in the motor.