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2.0 TDCi 140 common rail connector

1504 Views 6 Replies 5 Participants Last post by  harveyg77
Hi, does anyone know if the common rail connector on a mk4 2.0 TDCi 140 is the same as a mk3 2.0 130bhp or 2.2 155bhp :kaffeetrinker_2: ..?
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From memory it does look the same, three pin connector, with a tab to engage. Requires the tab lifting to open the mechanical-latch to split the male and female ends.

BEWARE - it is underneath the rail and although you can get to it relatively easily, the tab is on the rear and so you cannot open it by hand.

I ended up putting a tie wrap around it, pulling the tie-wrap against the body and then sliding the tie wrap down to effectively slide underneath the tab. Thus lift the tab relative to the connector body thereby opening the mechanical-latch.

If you have a spare one knocking about I would try it on that first so you understand how the latch operates.

Its really easy if you know what you're doing and how the tab works, but I certainly coudl not open mine using my fingers as they were too big, didn't hing 360 at every joint and I couldn't see the tab.

as above you can access the locking tab with a small screwdriver or similar, just be gentle!

I guess the sensor just varies resistance according to the fuel pressure, it would be interesting to know what the normal range is, and what the upper limit is before the ECU throws a fault code.
It looks the same but it isn't. I tried to see if I could fit a Tunit box I had for the MK3 on to the MK4 and it doesn't fit.
Thanks for the replies, looks like I'll have to invest in a new one then..!
Get in touch with Tunit and ask them how much to re-program the unit for your new car...:)they will fit the correct connectors on as well.

Tunit will reprogramme your module and supply a new connector that is correct for your new vehicle. Mike is very good like that!

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