Hows your vacuum at the brake booster ...?... You really need to put a vacuum gauge on your motor .. And see how good the vacuum is and if the gauge is really moving a round .. If the gauge is really moving a round you have a bad hole ( cylinder ) ...The motor has a 150 compression right now ?..Or it did last time you looked ?.. Make sure thats still true ... I'm dealing with someone right now that was just sure one part of there cars was new and fixed ... Come to see the new work had and parts had died .. Its sad how Mitsu trucks are hated over there goofy carb .. Mitsu really killed there sells by not making the carb alittle easyer to deal with ... But most carbs of the time are a pain ... Car makers tryed to keep the carb and pass smog ..And not go to EFI is why theres so much junk on a Mitsu carb ..

Sorry on your troubles

David

Hazardous Toys inc