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engine hesitates if I give it gas slowly

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    #1

    engine hesitates if I give it gas slowly

    Yesterday I changed the seals in my power steering pump and replaced the old belt with a new one. Now, if I press the gas pedal slowly the engine hesitates, when I let off of the gas it stumbles and if I turn the wheel slowly it stumbles; nearly stalling. It idles great at about 700rpm if I leave it alone.

    I've tried tightening the belt and resetting the ECU to no avail.
    Tags: None
    #2
    Remove PSP belt and see if it makes any difference. If it does, then, something went wrong with re-seal Job on PSP. Replace it with another unit or re-do the work.
    A&P-IA

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      #3
      strange set of circumstances, ecu would not change but resetting it never hurts, if the belt is super tight it could cause excess drag...

      remove the belt, see how it is, if it goes away put the belt on sort of loose/tight i cant imagine a psp causing that much drag but its possible

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        #4
        What could have gone wrong? I made sure that nothing was binding before I reinstalled the pump and the power steering is working better than ever.

        I went out and jacked the front wheels up to see if that'd tell me anything. With the front of the car jacked up, I got no fluctuation in engine RPM when turning the steering wheel(unlike with the wheels on the ground); however, both pressing the gas pedal slowly and letting off quickly caused stumbling still.

        Comment

          #5
          Did you torque the pulley to spec?
          My Members' Ride Thread - It's a marathon build, not a sprint. But keep me honest on the update frequency!

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            #6
            Not to spec; just good and tight. I'm not worried about it working its way loose since the engine rotates CCW.

            Anyway, problem solved(famous last words). Tightening the FIT valve and resetting the ECU did nothing but setting the base idle to 600rpm with IAC valve unplugged and resetting the ECU seems to have fixed it.

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