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[JamesV6CDX]

That questionable plug on my gearbox is now secure with all wires joined, confident there are no problems there.

HOWEVER the gearbox keeps going into limp mode, with no S or W modes.. sometimes it will work again.. but usually it does not.

Nothing is amiss.. I'm tearing out my hair...

[TheBoy]

shagged box?

I can tell you why its going into limp (though not always the cause, as with most electronic diagnosis)

[miggy]

Had the same problem on one of my Omegas, 2.0 select 1995, after spending pounds on having it checked it ended up having the auto box changed. get it checked out mate at vauxhall.
Pete

That questionable plug on my gearbox is now secure with all wires joined, confident there are no problems there.

HOWEVER the gearbox keeps going into limp mode, with no S or W modes.. sometimes it will work again.. but usually it does not.

Nothing is amiss.. I'm tearing out my hair...

[JamesV6CDX]

stranger....

Just went out, having changed nothing. Turned the key, and it all worked again.

Didn't change anything - a minute later it'd stopped working!

What the heck is going on!!!!!!!!!!!!!!!!!!!!

It wasn't doing this before the top-end rebuild... but I cannot see anything wrong, everything is in place, I've checked all connectors are home, incl the ECU one

Shall I change ECU?

[Dave-C]

stranger....

Just went out, having changed nothing. Turned the key, and it all worked again.

Didn't change anything - a minute later it'd stopped working!

What the heck is going on!!!!!!!!!!!!!!!!!!!!

It wasn't doing this before the top-end rebuild... but I cannot see anything wrong, everything is in place, I've checked all connectors are home, incl the ECU one

Shall I change ECU?

Vaccuum leak!  Check, Check and Double Check vaccuum pipes...  Had some funny stuff going on, on a a Scorpio with a vac leak once.............

DC,

[miggy]

I would have it checked out before you change anything, at least you would know one way or the other, as said I had the same issue, I could go days without the limp mode activating, I know how you feel mate, it used to drive me round the bend, I had all sorts of advice, everything was checked until I took it to vauxhall and they found the problem straight away.
Pete  

stranger....

Just went out, having changed nothing. Turned the key, and it all worked again.

Didn't change anything - a minute later it'd stopped working!

What the heck is going on!!!!!!!!!!!!!!!!!!!!

It wasn't doing this before the top-end rebuild... but I cannot see anything wrong, everything is in place, I've checked all connectors are home, incl the ECU one

Shall I change ECU?

[JamesV6CDX]

very interesting!

I am aware that, some of my vac pipes are not right, and I'm going to look at that, mainly around the heater/climate area

Are there any vac pipes  on the Omega that would affect the Tranny tho?

[JamesV6CDX]

It it turns out I need tech2 diagnosis, I'll be visiting Brackley, not vauxhall  

[Auto Addict]

Isn't there a breather pipe on the box?

[miggy]

Best of luck mate, keep us posted.

It it turns out I need tech2 diagnosis, I'll be visiting Brackley, not vauxhall  

[JamesV6CDX]

Isn't there a breather pipe on the box?

yeah, but not related to vaccum setup...

[Taxi_Driver]

It it turns out I need tech2 diagnosis, I'll be visiting Brackley, not vauxhall  

Why?  :-?

Surely you will want the vx dealer to tell you its needs a new g/b ecu + gearbox oh and engine ecu just for good measures  

Seriously.....it could have an engine sensor prob.....which is putting the gearbox into to limp mode and theres actually nothing wrong with the gearbox.

Have you paperclipped it?

[Omegatoy]

Hi James,
got 2 things to try, On senny and carlton autoss they are very very fussy on plug type as the wrong ones make the gearbox keep going into limp mode!!
maybe the same thing on the Omega?
second again on the above mentioned cars the Fuel pump relay is known to cause problems with this fault as it chatter when warm and interferes witht eh auto box ecu causing it to go limp mode!! then ten mins later its ok again!
so just a couple of suggestions which may not be your answer but just may be worth checking/swapping to eliminate??
Omegatoy

[Martin_1962]

Rev counter OK?

[TheBoy]

James, paperclip the engine - the engine can ask the gearbox to limp (and the g/box can ask engine to limp).

Before you did the top end, I bet you barely drove it much due to its issues.  Possibly and existing problem only showing up now, and unrelated to your work...