The Mitsubishi Pajero Owners Club®

bigal69c · Posted: Sat Nov 09, 2013 13:22 Post subject: throttle sticking open

is there anybody out there that can maybe help me. i have a 3,2 did and just recentley my throttle has been sticking open. what it does is driving along usually when its not properly warmed up, the engine management light comes on and the throttle sticks wide open. i have to stop switch off the ignition to reset it although it doesnt always clear first time please help

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geodrome · Posted: Sat Nov 09, 2013 18:39 Post subject:

Is it an automatic?

bigal69c · Posted: Sat Nov 09, 2013 19:11 Post subject:

no its a manual

geodrome · Posted: Sat Nov 09, 2013 21:21 Post subject:

Not heard of manuals reving, usually the autos. It will be something to do with the pump, are there any other issues?
Stalling, knocking on start up, lack of power ?

bigal69c · Posted: Sat Nov 09, 2013 23:10 Post subject:

no its never stalled what pump do you mean

bigal69c · Posted: Sat Nov 09, 2013 23:11 Post subject:

power is fine and starts as norm

geodrome · Posted: Sat Nov 09, 2013 23:25 Post subject:

bigal69c · Posted: Sat Nov 09, 2013 23:28 Post subject:

cheers

Davie5316 · ***** Joined: 31 Dec 2011 Posts: 513 Location: Scotland

Geodrome is there not a throttle sensor (tps) that folk go on about ?

Can remember folk talking about replacing them?

geodrome · Posted: Sun Nov 10, 2013 10:30 Post subject:

There is lots of sensors, sometimes a relatively cheap one like the speed sensors, the TPS is part of the rotorhead and a major repair. There is also the switch on the throttle pedal, but I would nod try adjusting that as it needs to be set up by a dealer.
I am holding back from suggesting the slow speed side of the pump is failing as he does not have all the symptoms yet.
It might be worth cleaning the EGR system and the inlet manifold, especially the outlet to the boost sensor, small pipe on side of manifold.
His problem is not the one I ever suffered from, so I don't have a definite fix. Confused

assassin · Posted: Tue Nov 12, 2013 17:51 Post subject:

There is a throttle position sensor.

On the rear of the throttle pedal is a potentiometer and this has two fixed positions, these are a microswitch when the throttle is released which activates the enginei dle map, and one when given full throttle which gives it full bananas, in between these positions there is a variable resistor which alters its resistance in relation to the throttle position. so there is a TPS but not a separate one as in most applications as the earlier injection systems.

The fault could be something as simple as removing the potentiometer and cleaning it with a good electrical cleaner, a floor mat jamming the throttle pedal open, or just muck around the potentiometer.

geodrome · Posted: Tue Nov 12, 2013 23:16 Post subject: