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Anonymous Posted on May 21, 2010

Motor surges when stopped at a light. RPMS go up ...

Motor surges when stopped at a light. Rpms go up and down

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  • Master 10,319 Answers
  • Posted on May 30, 2010
Anonymous
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Joined: May 22, 2009
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Replace the idle speed control motor

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This engine has a surge; AT 35-45mph,it's a bit more prounounced, not as bad, but still there at 60mph. As the tach goes up some, then down, so does the motor, up then back down, etc.Any ideas?

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Audi 2002 a4 v6 2.4l when the car first starts the RPMs surge up and down unsteadily this stops if you give a few revs on the accelerator pedal. When driving around 50kph the rpms surge slightly it feels...

You have two problems. The surging is from a dirty throttle body and /or air filter. The selector light could be from a bad selector switch or internal transmission problems. Have the car scanned for codes.
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II have a 1989 F250 with a 460 gas motor, it starts but after 1

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1994 Geo Tracker 4x4 Automatic

it is probably out of water as mine did that and the radiator was dry. due to a bad water pump.
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