So I'm up in Michigan for a few days, and I've driven the Malibu some. What I've noticed is a faint stumble just above idle. I had the same issue before and it wound up being one of the vacuum port plugs on the carb was cracked. This time around nothing is cracked, so I'm a little confused. Disconnected/cleaned out/blew out the air orifices on the carb, no luck. Moved the accelerator pump to the other 2 possible positions (Edelbrock 1405), no luck. It's just barely above idle, around 1,000-1,200rpm. Once I get the throttle past a certain point RPMs jump up at least 3-400, and past that the car runs fine. I'll only be up here a few more days & it's not a huge thing, but it's definitely something I need to address. The car sat for several months, but was started occasionally. I don't think it's an old/bad gas issue, but I'm not positive.
Any suggestions?
Any suggestions?