Hey everybody -
I've got this 86 Suburban C20 with a 454 engine. I don't drive it much, and it sits for a month or two at a time. Last time I drove it, all was well for the first hour or so, and then it just started acting funny. It would start and idle fine, and running up the accelerator under no load was fine, but under load it missed quite a bit. It wasn't particular doggy, and I didn't have any trouble getting up to or maintaining speed. But I'd push down on the gas and it would hesitate, and then suddenly roar into life. Automatic transmission, if it matters.
Any general ideas what is going on? I put a new fuel pump on within the last 10k miles (although that was two years ago).
Thanks -
edge