If a 1998 Oldsmobile 88 is shutting down after being driven for a while, the vehicle may have a problem with the computer. Something is telling the computer that the vehicle needs to be shut off. A new computer might fix this problem.
it could be a tuneup
Most likely needs a tuneup done. Check the timing and change the normal tuneup part.
14mm
Change the fuel filter and adjust the valves.
Read through the "Related Question" that discusses a common problem with the Windstars and rough idle - check engine codes P0171 & P0174. That might be part of your problem too...
Either a leak, bad gas gauge, poor driving habits. We really need more info. Before and after MPG?
TuneUp Utilities was created in 1997.
If this is a carbureted engine, it could be a vacuum leak. Or possibly a low float. Or maybe the timing is off. If there haven't been any recent changes to the tuneup, I'd be looking over the vacuum lines and intake gaskets real close.
It could just be the AC compressor causing the engine to shake when running at lower speed. If it's any more than that, the engine might need a tuneup, motor mounts or possibly a burned valve.
NO, but a good tuneup will probably cure your problems. There is no cure in a can for the symptoms you list.
check iac motor, or tps sensor for starters. check for tuneup.
It varies depending on the year and make of the vehicle. But where I live most of the parts can be acquired for around $40-$50.