Just got off the phone with my brother to see if he can come over to help me try and figure this thing out before all my hair is gone. As it turns out he's got some problems of his own I didn't know about.

He's got an '88 chevy running a stock 305 throttle body. the engine always ran perfect until he let it sit for 2-3 months this past summer. After starting the engine for 5 minutes it starts to run rough with lots of black soot coming from the exhaust. Total loss of power. He stated that it seems to be loading up on fuel. He figured that it needed a tune-up because it had been some time since the last one. He changed the plugs, air filter, cap and rotor. None of these things have made any difference.

Again, the engine always ran well until it sat for 2-3 months. The motor is a totally stock chevy 305. electronic ignition and throttle body injection. Starting is no problem, 5 minutes later severe black soot from exhaust and loss of power.

Thanks for all the help.

Bart