what would make my car lose engine power
Well that all depends on the specifics. There is3 factors needed to make the engine run 1 air 2 fuel 3 spark If one of those three isn't working you will have engine failure. To answer your question fully give more details so it is possible to trouble shoot your symptom's
It could be your mass air flow (MAF) sensor. I had the same problem. Mine would tell me something like 'loss of power to engine' then just drift. You may also want to check all hoses to make sure they are all connected and no holes.
Looking for a Used Grand Prix in your area?
CarGurus has 4,404 nationwide Grand Prix listings starting at $1,800.
Search Pontiac Grand Prix Questions
Pontiac Grand Prix Experts