[Kobus Pienaar]

Good day Guys,

My Pajero started with a serious engine problem in January.

When you start it the engine stalls quickly and if you put your foot on the fuel pedal slightly it will start and keep idleing. If you take your foot of the fuel pedal and put in the Drive or Reverse the engine will stall again. If you keep the revs up - above 800rpm the engin keep running when you put it in D or R.

When you stop at any place with the gearbox in D or R the engine vibrates very rough and when you put it back in N or P it idle smoothly! If you switch on the aircon while it is idleing the engine will eithe stall or rev very high.

What I did found was that the gearbox needed about 800ml oil and after I added the oil every thing was much better but some days the engine will run smoothly all day but other days I have the bad vibration problem again!

This morning when I needed to go to work the Pajero started and reved very high and stalled. I tried it a couple of time and the same problem every time. I noticed that the revcounter did not even moved!

I just checked all the fuses and they are all fine. I cleaned the wire plugs on the injector side of the engine - these with oil on them causes the ECU fuse to blow!

To start the engine is still the same problem!

Is there something else that I can check? At this stage I can not take the Pajero anywhere to get it checked.

Regards,

Kobus

[Nick Gibson]

Hi Kobus

I have no expertise in the 3.2 did model so I cant help you, however it sounds like the idle control butterfly valve is acting up, but I am certain 4ePikanini will be along shortly to assist you, he is a guru when it come to those 4m41 motors.

Good luck

[4ePikanini]

disconnect the vacuum pipe going to the idle diaphragm and plug the pipe with a screw or golf tee



The car will throw a check engine light at idle when up to temperature (don't stress about it, the light will go off when you put the pipe back on and restart the car)

Monitor the car's behaviour for the next few days. If the problem has disappeared then you need to back out the idle diaphragm adjustment screw



More info here - https://www.pajeroclub.co.za/forum/viewtopic.php?t=3035

[Kobus Pienaar]

Thanks Marius, I will try that.

I went to East Rand Mitsubishi and spoke to the workshop manager and he said that the problem may be the diesel pump and I need to check the connecters. The spares department told me that the new diesel pump cost R36 000,00!

When I got home I tried to disconnect the plug at the back of the pump - red and black wires - but it was full of oil and I could not get it off. I tried to start the engine again and it started and the revcounter worked! It did not rev normally.

I swiched it off and decided to spray that side of the engine with the enine cleaner to get rid of the oil. Afterwards I tried to start it again and nothing worked!!

I will try your suggestion and let you know.

[Kobus Pienaar]

I disconnected the vacuum pipe and blocked it and tried to start the engine but the revcounter still did not work and the engine just reved up and died!

[andrew.ashton]

Hi Kobus,

In two of your posts you refer to what seems to be a lot of oil on the inlet side of the engine.

Where is all this oil coming from?
Maybe pop the engine cover off if you can't easily see where it is coming from. (4 10mm A/F bolts with captive washers)

If you really want to do a good job of cleaning up the electrical connections to the injector pump you will probably need to remove the battery tray.

[Kobus Pienaar]

I did take the engine cover off but still can not see where the oil leak come from!

I just can not get the plug of back of the diesel pump! I think that the problem might be that there is no voltage going to the pump because the revcounter work from the diesel pump.

[andrew.ashton]

I did take the engine cover off but still can not see where the oil leak come from!

Check if the lining material of the engine cover is not saturated with oil - from someone not doing a good job of filling oil - maybe it is coming from there?

I just can not get the plug of back of the diesel pump! I think that the problem might be that there is no voltage going to the pump because the revcounter work from the diesel pump.

Workshop manual (Download from here: Workshop manuals) Section 13C shows the pump.

Page 13C-13 of the Service Bulletin at the end of section 13C shows the many plugs / connectors on the pump.

Remember every plug / connector has some locking mechanism that needs to be figured out to release it in order to prevent breakage.

If you are feeling out of your depth then I suggest that you need to get your Paj to Alan Black Diesel/ Go Power in Springs.

[Kobus Pienaar]

Thanks for your info Andrew!

I started the Pajero at 07:30 this morning and it idled at 1100rpm but when I put pressure on the pedal it idle roughly and does not go hihger then the 1100rpm.

I removed the vacuum pipe Marius suggested and blocked it and the Pajero idled smoothly and I can rev it up put in in D and R and even put the aircon on and it idle 100%!

I kept it running for about 10 minutes and swiched it off and started it again and it was running fine.

At 09:30 we wanted to go to a shop and did the starting again and now it has the same problem again!!!

[4ePikanini]

Look underneath by the throttle pedal. You will see a longish grey connector. Disconnect it and spray both sides with electrical cleaner. Reconnect and make sure it goes in all the way.

Do the same with the 3 small and 1 large connectors that feeds the diesel pump in the engine bay. Be careful. The connectors and wiring will be VERY brittle.

Also make sure that the throttle body moves easily. Manipulate the mechanism on the idle diaphragm (the picture i posted earlier)

http://www.youtube.com/watch?v=EEvaIomD4Ow


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