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
Vacuum leaks .. high idle solenoid messed up..works with the defrost setting..
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
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.
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.
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.
219 views
Usually answered in minutes!
×