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Discussion Starter · #1 ·
Hi all,

I'm getting an odd juddering/stuttering from the engine which I'm finding hard to describe so also finding it hard to figure out and get help. It's like a mini stall/missfire or going over a hard pothole, the van (2003 T4, 2.5 AJT with 189k on the clock) judders and its feels like the engines going to land on the floor. At 70mph this is tad bit scary.

Last week I got it on the Vagcom at the local vag specialist and its come back with these:

17946 Fuel shutoff solenoid open or short to ground.
17656 Start of injection timing control deviation - intermittent
17653 Needle lift sensor short to ground - intermittent
17654 Needle lift sensor implausible signal - intermittent

Apart from this random stuttering/juddering the van drives fine, starts hot or cold and is pretty much smoke free on starting.

Any help on where to start or pointers to stuff to read would be much appreciated :)

Si
 

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Discussion Starter · #3 ·
Ok, currently dont have a cable so I'll give the garage a ring and see what I cant sort out. Failing that I'll have a look on ebay for a cable/vcds lite.
 

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sounds like the start of the problem with my van.... new fuel pump sorted it....T:
 

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Discussion Starter · #6 ·
Thanks for the replies guys! Much appreciated. VagCom cable on order, should turn up wednesday and ironically today a bottle of Rhino turned up, btw thats bloody quick, thing I only ordered it friday :)

Cheers,

Si
 

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Thanks for the replies guys! Much appreciated. VagCom cable on order, should turn up wednesday and ironically today a bottle of Rhino turned up, btw thats bloody quick, thing I only ordered it friday :)

Cheers,

Si
With only limited dealers at present we aim to please when it comes to delivery times.

Thank you for the good feedback.

Ron.
 

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Discussion Starter · #8 ·
Hi guys,

Cables turned up and after I've reset and taken the van out for a spin. This is what I've got from the computer:

3 Faults Found:
17946 - Fuel Shutoff Solenoid (N109): Open or Short to Ground
P1538 - 35-00 - -
17656 - Shareware Version. To Decode all DTCs
P1248 - 35-10 - Please Register/Activate (Start of injection timing control deviation)- Intermittent
17653 - Shareware Version. To Decode all DTCs
P1245 - 35-10 - Please Register/Activate (Needle lift sensor short to ground)- Intermittent

Added in the text from the codes in the original post in brackets. Any ideas guys?

Thanks in advance and appreciate your help, very new to this world :)

Si
 

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I had the similar symptoms with a 17656 error code last year. Turned out to be an intermittant fault with the sensor injector. An expensive part only availiable from VW for the AJT. It did fix it though. Have you perchance done anything to your van that would cause high EGT?
 

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2nd fault code means your fuel pump timing is quite a bit out.

I would first check the wiring loom across the top of the engine for breaks and rubbed through wires. Maybe even check the continuity at the injector and the stop solenoid back to the ecu.

If all that tests out ok then it is probably 2 faults - stop solenoid and injector.
 

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I would start by checking the multiplugs on the front of the engine they get wet and corrode. I'd also Check timing belts and tensioners, then get the pump timing checked. T:
 

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Discussion Starter · #12 ·
Thanks guys, had a look around and tried having a go at (and failing at) testing so going to take it off to the garage at the weekend. Putting rhino in seems to have made quite a different, sounds different, driving better so think its a case of timing and probably the injectors.

Will see after the weekend, thanks very much all!

Si
 

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HyperTronix,

My AJT had exactly the same problem as yours - an occasion 'stutter' or 'lump', often when cruising at speed, felt like hitting a big pothole. Would do it a couple of times, then be OK for months, then start again - always seemed to be on a big trip, like when setting off for France, just to keep me on edge. Fortunately it always re-started instantly - though it was a bit scary when it started doing it in the third lane of a busy motorway. 'Coil' light would come and go, didn't seem to make much difference to the running.

Eventually got it pinned down to a duff needle-lift sensor in the 'control' injector. Replaced this (about £200 from the local diesel specialist) and the problem was completely cured and has never reappeared. Feel much more confident about long journeys now....

You can check the wiring from the injector into the loom via the connector block on the front of the engine, low down, but I suspect you'll find it's an internal fault with the sensor in the injector. On the plus side it's a relatively easy spanner job to replace.

Hope this helps.
 
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