Hello all. I have a 80 with less than 100k miles. Generally well maintained. Recently replaced alternator, battery, spark plugs, starter, fresh oil, some of the belts. Since having that work done i've noticed two things. A much more pronounced whine both in idle an when i step on the gas. Now it has a trd supercharger but don't ever remember this sort of whine before. The bigger issue is the stutter an hesitation from the engine. Happens when i first step on the gas at low rpms. And happens even when the engine is hot. I've also had a few instances where the car won't turn over at all after i've been driving around a while and parked. Any thoughts?