I have a 1991 Chevy Astro Van, RWD, 4.3 V6, Carburated Fuel Injection, with 199,289 miles on it. I've kept up all the services, run it through every diagnostic problem it's ever had, for the first time two weeks ago the power belt broke on me while driving. I've always had it replaced once a year (I'm not fond of a single belt for the entire engine), after the power belt broke I had it immediatly replaced, and right off from the time I started the van and left the repair shop (not the one I usually go to) I've had an issue accelerating, as soon as I step on the pedal to gain speed the entire engine acts like it's choking out or bogs down dramatically. I've just run the van through it's annual service/diagnostics, all systems read normal in the testing phase, transmission service showed no problems, no shavings, clutch materials or any other bits and pieces in the old fluid, and the test drive (low speed) showed no problems. I did pull the air cleaner off and found the carburator/injectors loaded with heavy carbon/varnish deposits, spent two hours cleaning what I could see. I and my regular shop mechanics are at a loss (admittedly the shop is primarily a " Ford" repair shop but they've taken care of all my vehicles over the decades without fail). I know that's a lot of information, but I tried to get all that has been done in the past two weeks to try to figure it out. In case you were lost in the history, the main problem is the bogging down of the engine as I attempt to accelerate, this started after the power belt was replaced, help please?
Monday, July 9th, 2007 AT 7:39 PM