1996 Jimmy SLT Chug Chug


New member
When I start it up for the first time eash day, it starts fine does the high idle thing for a second then 650rpm. When I put it in gear (foot on brake obviously) the truck Chug Chugs at 750 or higher for five seconds then drops down to 650 Rpm again.

No clue checked vaccum no leaks mostly new stuff all around (had her for 9 years now) been doing this from the beginning. Can't pin it down.