Cav 4X4 Turbo. Rynning in Two Wheel Drive (waiting on new tyres) Had new clutch fitted a few weeks ago. Walking across car park today and notices this wire with a round plud hanging down by the zorst at the back of the engine.
Not getting any engine fault light coming on. Not sure if 4X4 as it has been disconected.
Im only guessing but its probably the first gear boost limiter (which should go to the under side of the gear box) to put it simply opel limited 1st to make the car controlable when accelerating and also to protect the transmission from the fierce pwr of the turbo engine
1) If it is this and has been simply disconnected then you have a nice surprise install because it means your car is only running approx 1/2 boost cos it always thinks it's in first gear all the time, by reconnecting it you will find that first gear is the same as normal but 2-6 is much quicker
2)The mod was done correctly in the first place and aswell as being diconnected the connector was then short-circuited ( a cut up paper clip will suffice ) meaning the car thinks its never in 1st gear and always runs full boost no matter what gear your in, (including 1st) which is fun and noticably quicker for 1st gear but will also knacker your 4X4 system due to additional strain
ps its to uncontrolable to run it like this in 2WD
From your description I would suggest it's the temperature sensor for the transfer box. Probably disconnected from behind the pressure accumulator block. Have a quick look behind the plastic cowling above the accumulator for a spare connector.