Suddenly, my engine won't throttle down, as if I'm holding the gas pedal down.

Asked by Sep 17, 2015 at 02:47 PM about the 1991 Volvo 240 SE Wagon

Question type: Maintenance & Repair

I was driving and the engine was working fine.  Then, the engine would start
revving, even though I had released the gas pedal and the pedal returned to a
resting position and I had depressed the brakes.

Shifting the gear to neutral resulted in the engine revving high (as you might
expect if you were depressing the gas pedal while in neutral), even though I
had release the gas pedal and it had returned to its normal position.

Everything about the experience felt exactly as if the gas pedal were being
constantly pressed.  My thoughts go to the throttle pulley somehow not
returning to the idle position.

I am hoping to review the parts of the engine's operation to confirm what is
wrong and if possible, use my meager skills to fix it.  Or more realistically, point
a mechanic to the most likely candidates.

6 Answers

20,280

Clean throttle body and clean or replace (ICS) Idle Air Control valve or Mass Air Flow Sensor depending on which one your vehicle has.

2 of 2 people found this helpful.

Thank you, firebird338. I'll give that a shot.

1,705

It sounds to me like the throttle cable is stuck. That happened to my V70, just not as bad.

1 of 1 people found this helpful.

Thanks apbimmer98. I'll give that a look. I hope it's that easy.

335

Did you find a resolution? If so be sure to post for others looking for answers. If no resolution, you might check your throttle position sensor. We had the same thing happen to our shop car (98 V70R)

Basically, I spent a lot more time working on #1, when it was really just #2. :-) The Volvo runs well again, after re-seating the throttle cable. Thank you all for your help. Scott

Your Answer

240

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