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[RobG]

What's the electrical connection to box?

Modulator valve on steering box controlled by the servotronic relay

[feeutfo]

What's the electrical connection to box?

Modulator valve on steering box controlled by the servotronic relay

Thanks Rob.

So some wires to it that could be open circuit or valve sticking/wired backwards?

I think someone's been in there, because the sheer bolts on the column still had the sheer heads on. Going by 2woodys comments when he checked steering box alignment.

Guessing the balve is between the box and chassis rail, facing outboard..?

[feeutfo]

Should add tech 2 shows no codes in servo tronic.

[RobG]

Drove TB's briefly yesterday. Much easier to steer than mine.

So it's not servotronic relay.

What's next easiest to check..?

Baring in mind symptoms are complete opposite of a tired pas pump. In that the assistance is greater at low revs, and much heavier at high revs. Is sumat wired up backwards...?

That`s how it should be if servotronic is working correctly, faster the car is going the more the valve opens to release the pressure from the pump

[TheBoy]

chrisgixers does seem heavier when driving around. Noticibly heavier.

[RobG]

What's the electrical connection to box?

Modulator valve on steering box controlled by the servotronic relay

Thanks Rob.

So some wires to it that could be open circuit or valve sticking/wired backwards?

I think someone's been in there, because the sheer bolts on the column still had the sheer heads on. Going by 2woodys comments when he checked steering box alignment.

Guessing the balve is between the box and chassis rail, facing outboard..?

#10 in this diag.

[feeutfo]

Tech 2 set s-tronic to max assist, and it's made no odds at all. Other than a slight gyroscopic sensation at dead ahead.


So' if its as it should be, but just heavier, top mounts next would be logical, by the sound of it...?

I just can't see them making that much odds so close to dead ahead.

[feeutfo]

And a loom plug to connector on the valve.

[RobG]

Tech 2 set s-tronic to max assist, and it's made no odds at all. Other than a slight gyroscopic sensation at dead ahead.


So' of its as it should be, but just heavier, top mounts next would be logical, by the sound of it...?

Not too good with "inexplicable" steering probs so can`t really add any more input

[TheBoy]

Not sure exactly where No 10 is, or if it needs PAS fluid drained. But wonder if thats worth swapping over...

[feeutfo]

Tech 2 set s-tronic to max assist, and it's made no odds at all. Other than a slight gyroscopic sensation at dead ahead.


So' of its as it should be, but just heavier, top mounts next would be logical, by the sound of it...?

Not too good with "inexplicable" steering probs so can`t really add any more input

Yeah it's annoying, just thinking aloud really.

Pic  from eBay
http://www.ebay.co.uk/itm/VAUXHALL-OPEL-OMEGA-3-0-V6-POWER-STEERING-BOX-9227770-/350224425236
So from that, if I haven't got me dizzy hat on, it is up near the bulk head, engine side.
Purple and black wires.

[feeutfo]

Not sure exactly where No 10 is, or if it needs PAS fluid drained. But wonder if thats worth swapping over...

Yes I have a spare. Although it will be two fairly major oil leaks.

[Kevin Wood]

I wonder if the relief valve in the PAS pump is opening too soon, or sticking open, so pressure is less at higher engine speeds?

Wierd one, as you say.

Have you tried removing the Servotronic unit and comparing 2 cars with minimum assistance, just to get a baseline without any electrickery involved?

[feeutfo]

As mine is set to max assist, and presumably his is set to the usual min assist, we where expecting a rather marked difference when we swapped servo t relay with Tunnies car at the Wycombe meet. Made no odds to either car. We didnt even bother swapping it back.

Or rather Tunnie didn't.

[feeutfo]

Oh sorry. Remove the st relay altogether.

No. Good shout Kev. I could try that today.