Question about Lexus RX 300

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Engine idle eratic

When in park it revs up and down erratically until it eventually dies. when driving down the road it will go 40mph without touching the accelerator

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  • Lexus Master
  • 3,103 Answers

Vacuum leaks .. high idle solenoid messed up..works with the defrost setting..

Posted on Dec 29, 2013

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

tjab94
  • 16 Answers

SOURCE: engine dies when put in

its a dodge, you'll have a lot of engine problems, trust me

Posted on Aug 20, 2011

  • 104 Answers

SOURCE: 2004 stratus 2.7L Erratic idle, sometimes dies, sometimes revs at stops

hey-I have has this before different car but same - idle control valve is failing - computer at shop will pick this up on diagnostic

Posted on Oct 12, 2008

  • 170 Answers

SOURCE: 1985 Volvo 240 - just bought it - eratic idling - was bone dry

The coolant leak could be a blown head gasket. And the not going over 30 MPH could be from the catalytic converter being clogged. Do a compression test for the head gasket, and remove the O2 sensor from the exhaust and drive with the exhaust leaking out the hole. If the lower back pressure allows the car to go over 30 MPH then you know the cat. is clogged.

Posted on Feb 05, 2009

  • 17 Answers

SOURCE: rough eratic idling

Check the idle air bypass valve see if dirty, cleanable unit. you check the working of valve by powering the unit with 12 volts. check map sensor too.

Posted on Nov 20, 2009

archaeology
  • 662 Answers

SOURCE: when car is parked and idling engine revs up and

Sounds like your TPS (throttle position sensor), or MAF (Mass Air Flow) sensor has gone caflooey.

Check your car's OBD-II computer code(s), by going to Meineke Muffler, or PepBoys/Advance Auto
Parts for a free "Check Engine Light" diagnostic - they'll tell you the Error codes being posted by your car's computer.

Posted on May 14, 2011

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Rough eratic idling


Check the idle air bypass valve see if dirty, cleanable unit. you check the working of valve by powering the unit with 12 volts. check map sensor too.

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1985 Volvo 240 - just bought it - eratic idling - was bone dry


The coolant leak could be a blown head gasket. And the not going over 30 MPH could be from the catalytic converter being clogged. Do a compression test for the head gasket, and remove the O2 sensor from the exhaust and drive with the exhaust leaking out the hole. If the lower back pressure allows the car to go over 30 MPH then you know the cat. is clogged.

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2004 stratus 2.7L Erratic idle, sometimes dies, sometimes revs at stops


hey-I have has this before different car but same - idle control valve is failing - computer at shop will pick this up on diagnostic

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