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Discussion Starter #1
I'm so hoping this isn't a screwed up transmission problem.
On my way to the gym tonight and put my foot down coming out of a junction and the car started jerking quite badly on the upshift from 1st to 2nd. Almost felt like it was getting fuel starved. (got plenty of fuel)
On my way back home all seemed fine until the same thing happened when I floored it. I took it for a spin to check it and it seems to be only happening on full acceleration from 1st to 2nd, or when it kicks down from 3rd into 2nd.
Also it doesn't do it every time. It was fine all day today and had a spirited run over the moors on the way home from work with no issues.
I'm going to check the fuel lines in the morning to make sure i haven't got a leak and also pull fuses 11 and 14 to see if that does anything.
Has anyone else had this or can think of anything else to check?

Also no warning lights or codes!!
Cheers
Mark.
 

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Hi outlaw, i had the same problem with mine a few months back, i checked all the fuel lines and swapped out the fuel filter but it still ran like a dog when i took it over three grand, ran fine when you drove it steady around town, turned out to be the turbo actuator that was faulty, a diesel specialist near me sorted it for 200 quid.

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Discussion Starter #4 (Edited)
That sounds exactly like mine gasman so I'll keep my fingers crossed. It's got a Viezu remap on it petman but it's been on for months with no issue. My code reader does live data I think but I don't know what I'm looking at tbh. I don't think it's fuel related as I changed the fuel lines to the filter and the filter on the last service just after Christmas. Strange how it only seems to do it around second gear.


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Discussion Starter #7
Yeah if it gets me there! Was supposed to be doing the bottom arms and ball joints, arb bushes and inner tie rods today but I don't fancy getting rained on.

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Discussion Starter #11
Yeah I was just looking at the actuator and it looks like it all splits apart. Wonder what actually causes the fault? I'll get to junction 27 a bit early so I don't miss you all.

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Discussion Starter #12 (Edited)
Ok, I pulled the fuses this morning, took her for a spin and guess what. Nothing. Never missed a beat. Flooring it from stand still......behaved perfectly. Put it into 3rd and kept going slow then flooring it.........behaved perfectly!!!
Checked the fault codes when I got back and have a grey code logged.(can only be cleared by the ecu itself after a certain number of fault free runs apparently).

The code is P0046 - Turbo/Super Charger Boost Control Solenoid Circuit Range/Performance.
Do I take it this is the turbo actuator and its probably sticking? Or it got stuck and is ok now?

Anyone know how easy they are to take apart and clean up?

Ta muchly.
 

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My codes were 1974 boost pressure sensor malfunction & 1033 boost pressure control short to B +, he didn't need to take the whole turbo off to fix it, he said that they can be a right pain to get off, hopefully for you the all magic fuse pull might have sorted it, fingers crossed;)

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Discussion Starter #15 (Edited)
Just done a bit more searching and the boost control solenoid controls the actuator arm and the variable vanes in the turbo.
Serviceable part but cheapest I can find so far is a re-conditioned one at £180 on an exchange basis :(
 

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It'll be the actuator mark, it will run fine as long as you dont beat it too hard, i'd try and keep it steady until its repaired as you might do more damage if the engines getting starved


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