Still trying to get some problems with the Blazer ironed out. '87 TBI 350 with about 87,000 miles on it. New parts - cap, rotor, plugs, wires, fuel filter, O2 sensor, air filter, alternator, and alt belt. Ran a can of Seafoam through the oil, and about half a can through the brake booster line to clean the engine out a bit. Problem with the truck is that it intermittently dies when idling. It'll stumble a bit, and it seems like it's idling really low (no tach, so not sure exactly what it's at) and bogging. Right after it cuts out, it'll start back up; however, there's a pretty strong gas smell. I'm not sure if it could be a problem with something like the TPS (does a TBI engine have that?), or another sensor along those lines.