by Antkenn on Fri Feb 03, 2012 4:52 pm
I have a mn 2007 diesel 3.2 manual triton.
It has been to Mitsubishi a number of times for warranty work, twice for surging.
It has had all of the modifications with regards to manifolds and carbon as recommend by the dealer.
140,000 is now spout of warranty of course.
It has started surging again this time in second and third gear whilst accelerating and is becoming progressively worse.
Rev range at 2000 rpm, not noticable on the highway at one hundred at all.
Initially only a surging noise,no noticeable movement, now some jerking at forty ks
It doesn't do it for the first two minutes or when cold then it get worse.
They initially thought it was worn tyres.
I was able to get it to surge whilst parked, revving the motor at three to four thousand.
So that ruled out any clutch or drive train issues.
I took the mechanic for a drive the other day and I couldn't get it to do it. We drove for ten minutes, up hills flat, so embarrassed.
It is there ninety percent of the time now but sometimes not.
If I t urn the car off for five minutes say to go shopping again its not there for the first two minutes.
Mitsubishi brushed me off after that incident, flashed the computer to retrain the injectors.
Not fixed of course.
They now want it for a day, when they have time, to pull off the top inlet manifold to check for carbon. They claim the mods would prevent the sensor being clogged.
A complete clean of the manifolds is quoted at six hundred plus.
I pulled the inlet manifold apart myself, whilst the pipe has some carbon and sludge it is mostly clear.
The sensor is clear, I pushed some wire thought the hole its fine.
I did the same to the old sensor hole it is dirty.
I hoped dirty terminals and that pulling them off and on might help, no.
The car has plenty of power, fuel economy on the highway is around eight with overall ten per hundred ks.
Not blowing any smoke.
The mechanic claims the two minutes delay is because the computer initially runs the mixture a little rich.
He doesn't know of any vacuum related issues.
I have replaced fuel filters, all the belts.
All services are up to date.
All recall items up to date, Mitsubishi performed some software upgrade two weeks ago.
My 2000 model Pajero had some limp mode issues related to a sensor on the injection pump.
Anyone have any thought please.?
I took photos of the manifold if needed.
The car is becoming I'd