Sticky Throttle Valve - 2.9

[jimed]

The throttle return has been slightly sticky for some time - not a problem on the road but I'd like to fix it. I talked to Kevin (kevtvrin) at S Club yesterday and we had a quick look at it. It looks as if there is some sticking at the throttle valve housing end. Kevin suggested disconnecting the throttle cable to ensure that isn't an issue and then to have a go at the throttle valve housing. I've looked in the Haynes Granada manual and there is nothing about that so I'm not sure if there are bits ready to fly apart or if its straightforward? Anyone know/have a piccy of how it goes together or is it easy to follow my nose? Also does anyone know where I could get replacement springs if I needed any - (last time I asked Ford the one on the throttle cable attachment was no longer available so I suspect these may be the same).
Jim

[ketvrin]

Hi Jim

if you remove the metal clip at the end of the plastic rod (just slides off the rod end... the inner face you cant see has a kind of slot with a larger hole in the centre to retain the pivot point) you will effectively have separated both parts of the movement. you should then be able to determine if the "lazy" return is due to the throttle valves/linkage or if the problem lies with the cable end of things... it felt like the throttle valve end of things to me I have to say...

I'm sure that the throttle assembly itself is not going to explode if you remove it to clean it... should be a simple rod with butterfly valves inside... cant find any pictures of it though sorry

good luck

K

Edited by ketvrin on Monday 23 June 16:28

[Barkychoc]

I think you can get gummy petrol deposits on the throttle plate & in the valve body.
If you remove the 2 little screws that hold the throttle plate, make sure you use something that will prevent them coming undone again when you replace them (I'm guessing some sort of threadlock but I'm not sure what type is suitable).
My old 1.6 pinto cortina came to a very sudden stop when one of them fell out and jammed between the top of the piston and cylinder head - if I'd been at speed it could heve been really serious as it locked the back wheels, fortunately I got away with just a very flat screw and removing the cylinder head to get it out.

Chris

[tozerman]

You could also try the pedal assembly itself, I lookd at mine recently because it was sticking and I found that the bolt clevis pin that holds the pedal on was slightly rusty, so I took the pedal off (a right pain) cleaned the pin and the pedal hinge and reasembled with plenty of copaslip and you would be amazed at the difference, worth a try ?
Cheers....tony..

[jimed]

Thanks for the above - I'm going to be away for a few days touring N Scotland, but not in the S unfortunately, so I'll have a go at the above in early July and let you know how I get on.
Jim