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Generation 2 Pajero NH - NL Models 1991 - 2000

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  #1  
Old 12-06-10
CRACKSPAJ CRACKSPAJ is offline
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Default problem no mechanic can figure out

well after 3 different mechanics and a mitsubishi specialist all telling me the same thing i went ahead and got it fixed and it changed absolutely nothing, the problem i have is i got my head gasket fixed and from then on my car has been idling off its head , over 2000 rpm in PARK and when dropping down to reverse it thrusts me a metre back and the revs dont drop below 1500 rpm at any stage of driving even idling at lights my mechanic cleaned the throttle body chnaged the idle speed motor chnaged the harmonic balancer got the an auto electrician to tune the idling and still nothing has helped the idling has anyone else had this problem with there pajeros its a 91 pajero just so you know.
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Old 12-06-10
sierra sierra is offline
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Which engine does it have?
2.5D 2.6 V6
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Old 12-06-10
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Matatak Matatak is offline
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whats the harmonic balancer got to do with the idle speed?

Sure the hand throttle lock isnt half on?
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Old 12-06-10
CRACKSPAJ CRACKSPAJ is offline
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harmonic balancer was changed because it needed to be and was rattling the engine making finding out the main problem harder , also its 3.0l v6 model .


also where would i find the hand throttle lock?
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Old 12-06-10
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around the same place as the bonnet release lever inside the car. Just up from it there should be a little twist knob which you can use to hold your throttle at a certain position
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  #6  
Old 12-06-10
HYDRO FAN HYDRO FAN is offline
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Have you put a vaccum gauge on the motor,sounds like you may have a leak some where or a vaccum hose in the wrong place
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  #7  
Old 12-06-10
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Yeah just check for vacumm leaks!! But if it was leaking, it my affect your brake booster also( Spongey pedal) I had a VR comm that was reving high and all it ended up being was a loose vacumm hose. The motor was reving high to compomsate for the leak. Just a thought!!
Steve.
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Old 12-06-10
CRACKSPAJ CRACKSPAJ is offline
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its weird you say that the brakes are abit spongy and also when slowing down to lights with foot on the brake it does 2 or 3 jolts before i come to a full stop , i may check all the hoses tomorrow....clean the throttle body and carby and check the hand throttle lock if i know what im looking at!
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Old 12-06-10
HYDRO FAN HYDRO FAN is offline
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Your leak may be in the booster itself, just crimp the the line and see if the idle slows down.
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  #10  
Old 12-06-10
dusty_nz dusty_nz is offline
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Def sounds like an air leak.

Basically with the engine idling crimp every rubber hose you can find.

When the idle drops you have found the problem.

However it also shows up with the idle being out of wack due to mixture being out.

Also they will idle okay with the intake hose off. If the above fails take the hose off so the throttle body is exposed and you will see a bunch of holes on the intake. Block them one at a time to see how it effects the idle.

I believe the fast idle uses a hot water circuit. It possible thats blocked or has an air lock?
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