On my 1989 E350 motorhome, I had a weak fuel pump near the fuel filter. I replaced that and the problem went away. The pump in the tank was fine.
You need to take it to your local Autozone or Advance and have them run a charging system test with their ARBST tester.
Rebuild it. If it's a 97, it must have close to 150k miles.
Since the needle in a compass is magnetized by induction it loses its magnetism easily by rough contact or heat.
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Check engine light, low power, no start, runs rough, bent valves,Check engine light, low power, no start, runs rough, bent valves,
Rough idle lacks power
Power brakes use engine vacuum to get their power. If the engine is out of tune, the loss of vacuum will cause it to run rough. Try changing the spark plugs.
No, neither the rough ER or the smooth ER produce power. Google endoplasmic reticulum.
lead your team through the rough loses and the glorious wins and always believe in your ability as a team not in your own abilities or someone else's pretty simple really.
I highly suspect the plug wires are bad or moisture has gotten in them. At higher speeds and throttle openings, the spark has a harder time jumping the spark plug gaps. If the wires (or path) from the coil to the spark plug gets restricted or shorted by water, the spark cannot reach the spark plug and the engine looses power and runs rough.
The power brake vacuum booster is probably failing.
Rough idling is whenever the vehicle's motor "misses" or does not fire causing an imbalance and a loss of rotation reducing the motor's power and causing excessive shaking.