Loss of power and jerky acceleration
Hi,

So, to be thorough I'll start at the beginning.

Went 4x4-ing, diff lock took a while to engage so I went on without it (light still flickering, hoping it would engage). On the obstacle I got a bit stuck and to get out had someone pull while I try and get a bit of grip, but when my rear wheels started to lose grip I heard a clac clac clac as the lock was trying to engage and I immediately switched off the locker (and the clac clac stopped as I pressed the button). Got the diff lock engaged later the day before a different obstacle, so don't suspect damage there.

Only relevance here is that after that clac clac my ABS warning light remained on (I have it sorted now, was just a little nik on the sensor cable, so repaired the cable and no more light).

At the end of the day went to inflate tyres (at this point ABS warning light was still on, but no others). On the way to the fuel station, about 5KM, while accelerating, reaching about 100kph the vehicle was jerky, sort of losing and getting power. It stabilised when I slacked off a little. Pumped tyres, checked some fuses to see if something blew (trying to sort out the ABS warning light) and when I started the engine again my CEL came on. Drove home, no power (assume we went into limp mode - shifts gears at 2200revs and in 4th won't go above 2200 revs). Checked my oil (this was about 3 days after a major service done by Steve's in Milnerton) and found it was overfilled, both engine and gearbox, by nearly double the volume (I admit I didn't check the gearbox oil with the engine on, which I know I should've done):
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Took vehicle to Steves Auto Clinic, sorted me out with a new Suction Control Valve and found the nik in the ABS cable. I'm now R8k down. Picked up the car from Steve's. They said oil was fine and they didn't touch it, but I checked the engine oil anbd it was filled to the top dot exactly (in the photo it's filled to the '8'). So they had to have taken out some oil :roll:. Anyway, on the way back to the office getting onto the highway and accelerating nearing about 100kph the vehicle made the same jerking motion, getting and losing power. Drove on calmly in the traffic and when the road cleared tried accelerating a bit quicker than normal, revs jumped but no response (almost like engaging the clutch and revving your engine on a manual transmission). I can accelerate and drive normally, just not quickly or accelerate as normal

Quite concerned about this. Should I take vehicle in to Mitsu or back to Steve's or has anyone had this or similar? Any suggestions would be welcome.
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Re: Loss of power and jerky acceleration
From the pic it seems you are driving a Pajero Sport. Am I right? Maybe give a bit of info on the model, engine and gearbox to try and assist.

When the CEL was on what code was logged on the system? This might lead you to the right direction to start sorting this out.

Also, how full is the fueltank and when last was dieselfilter replaced?

CATS

Sent from my LG-H815 using Tapatalk
2009 Pajero 3.2 DiDc Lwb GLS (Gen4) - Casper (Starting to grow on me)
2001 Pajero 3.2 DiD Lwb GLS Manual (Gen3) - Snoopy (SOLD but not forgotten)
2008 Pajero 3.2 DiDc Lwb GLS Auto (Gen4) - Silvester (SOLD)
Image
Re: Loss of power and jerky acceleration
Yessir. 2010 Paj sport 3.2 DiD GLS AT. 201 000km on the clock.

Not sure the code exactly, it referred to the fuel system and pointed the guys to the suction control valve (replacing that has solved the CEL), but will find out the exact code and let you know.

Got the vehicle back with fuel near empty, but filled up within 2km of Steves.

Fuel oil and air filters were replaced at last service < 1000km ago.

But doesn't sound like something related to overfilling of oil right ? I was thinking either that or fuel filter, but dropped my car at Mitsubishi this morning and they said issues on the filter would activate the CEL.

Maybe dirt got in when they replaced the suction control valve...
Charles Segal
Re: Loss of power and jerky acceleration
Hi Philip,
Sometimes helps to spread the search wider, google your problem for a worldwide search to see if your problem is more widespread & solutions they found.
Sorry cant help you directly.
Charles
Re: Loss of power and jerky acceleration
Thanks Charles. Did just that and came all the way back to this forum.

https://www.pajeroclub.co.za/forum/view ... =55&t=1249

Not a fundi on these things, but based on what happened to the guy in the topic above coil packs and ignition leads could be my problem too. Not sure what those are or what they do, or how they would result in the jerking or if my vehicle (diesel) even has those. Sounds like something unique to a petrol engine.

Anyway, with my car at Mitsu I think best is to just wait to hear from them. Best I can do now is speculate...
Re: Loss of power and jerky acceleration
I agree. Jerking does not seem to be related to the overfill of oil. Maybe replace the diesel filtwr as a start. Also undo battery cable and let it clear all fault codes by leaving it disconnected for 30 minutes or so. Then drive it for a while and see what it does?

CATS

Sent from my LG-H815 using Tapatalk
2009 Pajero 3.2 DiDc Lwb GLS (Gen4) - Casper (Starting to grow on me)
2001 Pajero 3.2 DiD Lwb GLS Manual (Gen3) - Snoopy (SOLD but not forgotten)
2008 Pajero 3.2 DiDc Lwb GLS Auto (Gen4) - Silvester (SOLD)
Image
Re: Loss of power and jerky acceleration
So, call from Mitsubishi this morning with dire news.

Their tests point to the common rail, which they would have to replace at R13-14K (and it needs to come from Japan). Apparently no way to repair any fault on it as its's a sealed, high pressure unit.

They want to test the injectors as well as the injectors could be causing the issues in the common rail, and that's why they pick up the problem in the common rail (at R9k an injector I'm praying the injectors are fine, because its an either or situation, well lets hope so).

Anyway, this after already spending R8k on a new suction control valve, heart wrenching. Any advice?

:cry:
Sadeq
Re: Loss of power and jerky acceleration
Cant you have the injectors reconditioned as all other diesel injectors. 9k is a bit ridiculous per injector, i hate the Mitsu agents
Re: Loss of power and jerky acceleration
Jip, I'd definitely look at that before replacing. I'd anyway not give mitsubishi the work. Just want their diagnosis.

Anyway, at R7k quoted to test injectors I'm going to try just replacing diesel filter as CATS suggested (could be water got in somehow when 4x4-ing - when the issue first arose) and try the 2 stroke oil with a tank of diesel 'boereraad'.

Also, no smoke, which seems to be the first indication of injector issues. So, my question is, if it's indeed the common rail and replacing the filter doesn't help, could I do damage driving around with a problematic common rail - for about 600km - before doing anything further?

UPDATE: To answer my own question, No. Worst case is CEL comes on and she goes into Limp mode, bleh! So, hou vir my duim vas dat dit net 'n filtertjie en bietjie conditioner kort om haar weer aan die gang te kry
Re: Loss of power and jerky acceleration
Question, shouldn't my CEL come on if my common rail or injector(s) are faulty?

I'm really trying to be 100% sure before I replace anything...
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