mk1 focus bad idle with elec load

[steveo3002]

2004 focus 1600 , it has slightly low idle with no accessories on , with a/c on the idle drops so it can barley stay running and the dash shakes badly

im sure it should have some way of bumping up the idle to compensate for elec load or the a/c , can anyone tell me what/where to look at

no warning lights on and all serviced up to date with genuine parts

[steveo3002]

already tried that...did need a clean but no better

ive sinse had a ford mechanic look at it,if you look between the manifold and engine theres a rubber hose as thick as a finger , watch while someone starts the car , mine partialy colapses and he suggests this is the problem

have ordered one and will report back

[steveo3002]

its hidden under the inlet manifold ...you can just see the end of it peeking out in your pic, you will need some extra long pliers to change it

i replaced it , £15 from ford , disconect the battery for 10 mins so the ecu can relearn , its improved the idle a bit but not fixed

next step ive ordered and idle valve from ebay...see how that goes

[steveo3002]

http://thumbsnap.com/Y28o6mNG

like so..peek under the inlet and you can just about see it , it has 3 ends

[steveo3002]

righto

new idle valve fitted (£20 ebay) , throttle body off for a good clean , battery disconected for 10 mins for a re learn

its idling much smoother , no fluctuating and it drops much smoother when coming to a stop

BUT the idle still drops to low with the a/c on so no harm done , feels like it needed the above doing anyway but my problem is still there

[steveo3002]

yep as you would expect...revs rise to cope with the added load

these were as common as muck but i dont seem to be able to get much diy help anywhere

[steveo3002]

yeah i guess if its the same with the idle valve unplugged then its not getting its signal

with the a/c off ...you can see that something is stabilising the idle if you put the lights on for example it seems to cope , just the a/c is too much load