now in despare

[thunderider]

weds i had a new water pump fitted (see avatar lol) as engine was dieing under power,water was boiling,anyway had new oneas i was told this was the problem,but now seem underload,going up slight incline on the motorway the temp needles up and down,it sit at a quarter the goes 3quarter then to the end,back to a quarter ,take foot off pedle seems to settle back down,could this just be a sender/sensor prob that could be lived with for a while?
also whats the thin wire from the battery live under the bonnet tha goes in to thebox at the front as mines corroded through,ad will i have to replce the whole red thing,
if this seems a bit garbled i can be contacted on 07973 470739,rob.
ps i pulled over im not lost water nor is the res filling it stays at the line.

[MrMPuk]

Was the water pump drive cheacked as this is also a common problem.

[thunderider]

i dont know,just left the van with them,i may take thermo stat out cus i need to get to leeds monday .im gonna be reall pissed off if its the thermo.....

[Nighthawk]

what engine is it?

[thunderider]

its a 2.4td 90ps

[Nighthawk]

Have you had a look at the wiring from the sensor?

I'd also remove the thermostat housing and have a good look inside, there is a small bypass valve inside which has been known to cause concern.

might be worth sticking on a new thermostat housing and stat.

[thunderider]

ive put a new stat in ran it for 30 miles on the motorway seems ok,now cant stop stat housing from weepin should have got another seal too....
but still need to know what the thinner wire fin the battarey live is that goes in to the fuse box,its corroded through but every thing still works

[Nighthawk]

A thinner cable on it's own running along with the main loom......sounds like the fuse link wire for the glow plugs.

The glow plug light will still work as that side of it is controlled by the PCM, but the plugs won't get a feed. It doesn't normally make much difference in the UK to starting BUT one side of that cable is LIVE.