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If your fuel pump is bad, the whole car dies. There's really no in between there. You can have a whole slew of problems...
- Bad O2 sensor.
- Faulty / Bad Spark Plugs / wires
- Coil pack (maybe it had more than 1 coil, and they replaced wrong one or not all)
- Vacuum Hose leak
- Catalytic Converter is clogged
- Clogged / Bad Fuel Filter
If you have a "Check Engine" light on, and your car was made after '94 (meaning, '95 and up), try having the codes run at a local auto parts store. Some do it for free, or if money's not an issue, just take it to a dealership and have them do a diagnostic. Generally, they'll charge you anywhere between $40 - $120, but they will tell you EXACTLY what is wrong, as well as ANYTHING else (even little things). The problem with cars, besides being expensive pieces of crap (regardless of which brand now and days), is that anything going wrong could be a whole bunch of things.
Velocity
try both tuneup and fuel filter change
When it either accelerates or decelerates
change in velocity
When an object accelerates it can change its speed or direction of motion. When it accelerates without changing its direction of motion, it can cover any distance in less time.
a car going from stoplight to next intersection accelerates at a positive rate of velocity change
Change your fuel filter. If if it only does it when the engine is hot, check for a coolant leak.
Barely.
Acceleration = (change in speed) / (time for the change)3 = (30) / (time)3 x (time) = 30time = 30/3 = 10 seconds
An object changes its state of motion when it accelerates or decelerates, usually caused by a force.
If the elevator accelerates, the acceleration will provide an additional apparent force.
my 99 Cherokee has a header leak. i know that's a problem but im wondering if that's causing the sputtering. it will sputter on a good acceleration and after transmission kickdown. no backfireing, no hesitation. i replaced the plugs, wires, cap, and rotor and it didnt change the symptoms. if anyone can help it would be apreciated!