I start my car up and it revvs high then low and continues to do that as long as my car is idling. it drives fine except when i brake, then it kind of jolts once when im close to a complete stop. PLEASE HELP!!! and also, when im stopped it doesnt rev but it is louder than usual.
SOURCE: Bonnet latch will not open and bonnet is in closed position
the cable connecting the handle to the latch is broken. remove the front grille and access the latch assembly. you will be able to release by hand and then replace the cable.
SOURCE: 1998 mitsubishi idle problems
it could be something simple as a wire or lead off under the bonnet or vacuum hose even a vacuum switch if all else fails get a free quote
SOURCE: mitsubishi idling problem!!??
Am not shure the kind of engin you really have but see if your stepping mottor is damage or need relpacing. that problem can happen if you have a faulty unit . it also called the step up unit or sensor, if your car have air condition is turned on and the rpm goes up and down that can be the problem , the unit can be found attached to the throttle body. just below.
SOURCE: 1997 Mitsubishi Galant Died
Sounds like the EGR valve is bad and is stuck in the open position.Just replace that and you should also check the catalytic converter.
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