Could be fuel pressure regulator on fuel rail.
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SOURCE: Rough idle, Car shakes, sputters and misfires upon acceleration
It sounds like you may have a problem feeding the fuel to your engine, I had the same problem with my 89 RS. All the 1989 model's fuel systems were recalled. I think you may need a new fuel pump. The fuel pump is located inside the gas tank in the rear of the car right under the rear axle. The fuel pump itself isn't too expensive, but with other small parts such as the electrical harness upgrade and fuel filter and the labor you should be looking somewhere in the $500 range. I hope this helps.
SOURCE: 1985 Toyota Camry sluggish acceleration
check the fuel filter and when was the last time you had a tranny service done and a tune up also check the drivebelt
SOURCE: GM 2.8 v6 idles fine but has no power upon acceleration.
Check your vaccum lines around the TBI. One may be loose and that will keep u from gaining power! Hope this gets u right!
SOURCE: 1997 Ford F150 4x4 5.4L
I would take the truck to an autoparts store and have the fault codes retrieved from the computer. Most stores will do the scan for free. I would lean toward a faulty throttle position sensor, but that's just speculation. The fault codes should narrow the problem down. Hope this helped and best wishes.
SOURCE: Sluggish acceleration, frequent jerking and engine knock at high RPM
Sounds to me like the timing is off! it COULD be bad gas though! run that tank through, and refill, then see how it feels!
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