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[Ford Prefect]

My power steering has developed a fault, at parking speeds it feels like it has ABS cutting in!, this gets faster as revs increase. While manouvering it appears as though it has no power steering at all till you rev it. It does feel like a slipping belt, but this appears not to be the case as the belt does not squeel, although it does look a bit old. This appeared today, the system is full and the fluid clean and there are no aparent leaks would anyone know what is causing this fault?

Stewart

[Entwood]

Possibly a tired (fubared) pump ?? Not giving the required flow/pressure at low RPM ??

[Ford Prefect]

Possible, but I'm not so sure, as I had a worn pump on anopther car, and that just got heavier over time. How does the speed sensitive steering work?

Stewart

[Entwood]

I've no idea how that part works, something "magic" in the steering box I expect !!!, however .. in your opening post you said

While manouvering it appears as though it has no power steering at all till you rev it

speed sensitive is done via a signal from ABS ECU, so engine revs won't affect that IMHO, only thing they affect is the pump itself.

just my 2.35 p's (inc VAT )  

[Dragon]

Mine does this on tickover with the A/C off. It's because (on some models?) they are set up to the USA emission standard with the tick over set at 500RPM with the AC off and 650RPM with it on. 500RPM just doesn't drive the PS pump properly.

D.

[dbug]

Normal tickover on v6 is 600 with a/c on & 500 with it off.  Both mine tickover at these rpm & power steering ok on both.

Could be issue with sensor on rear axle.

[Ford Prefect]

Well I have aquired a Pump, however on reading the manual it seem to think I have to take the AC pump off? has any one found a way to remove it from the top? (like I did with the car I took the repalcement pump from! although that had no heads on it) I really do not want to disturb the AC having just shelled out to have it all sorted out.

Stewart

[Robin Hood]

Well I have aquired a Pump, however on reading the manual it seem to think I have to take the AC pump off? has any one found a way to remove it from the top? (like I did with the car I took the repalcement pump from! although that had no heads on it) I really do not want to disturb the AC having just shelled out to have it all sorted out.

Did my V6 last summer, from what I remember it's a little awkward, but did NOT need to touch the air con pump  - get what you can out off the reservoir first - it can be a little messy.

Remove the bagpipes etc, for easy access.  Detach and remove the reservoir from above.  Remove PSP bolts/bracket, pump & pipes from the front.

[Ford Prefect]

Well got it changed and its all working fine now. All I can say about the Haynes manual,,,, rip the page out and throw it away, as there is no need for half the work it claims. Take the ducting out, remove the the coolant hose above it, take pipes off, undo three bols from the front of the pump and it's off!. Only one niggle, the pump I used was from a 16v omega, so I had to drill out the threaded holes and would have change the pulley if I could have got the thing undone.. so it currently has the slightly smaller diameter 2 litre pulley, which should not effect much, but the slightly incresed spin rate might have made the PAS lighter!

Stewart