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[kevin xf]

Hi all.  Not been on here for a while that's a good thing             Last couple of days I've noticed on tick over in neutral the revs start creeping up on its own and if I have the blower on the revs drop  It's a 3.2 auto..

[Webby the Bear]

Are they jumping up and down as you idle?

[kevin xf]

no its ticking over and just slowly creeps up. it stops when i rev it.      if im sat still with the blower on in driver the revs suddenly drop then pick up drops every 10 seconds as if it going to stall. if i turn the blower/heater off it doesnt do it... im looking at selling now as its costing too much on fuel  6 mile round trip to work everyday   need a small run arounnd.

[05omegav6]

Sticky throttle or throttle position sensor would be my first guess

These do idle higher when cold... probably best not to leave it idling in drive whilst it's warming up, though in six miles you won't warm up much more than the headlights

[AndyStobbs]

Is that with your air conditioning on?

[kevin xf]

I've had it 2 years and have no idea how to turn air con off.   It make a difference when I turn the ECO on.      It doesn't do it when engine is cold only when hot ?! But only does it when heater blower is on. I've just had oil service and gearbox oil changed and breathers cleaned out AGIAN..

[RobG]

I've had it 2 years and have no idea how to turn air con off.   It make a difference when I turn the ECO on.       It doesn't do it when engine is cold only when hot ?! But only does it when heater blower is on. I've just had oil service and gearbox oil changed and breathers cleaned out AGIAN..

Turns the A/C off

[kevin xf]

Oh right ok.  Thanks for that.  Sounds like its air con related then?

[Webby the Bear]

Oh right ok.  Thanks for that.  Sounds like its air con related then?

It's perfectly normal...the revs increase as the engine drives the A/C compressor. When you hit the ECO button which turns A/C off...revs drop as the compressor is no longer being powered by the engine

[AndyStobbs]

Sounds fan related at first guess. Do your radiator fans work correctly, and on both speeds?

[kevin xf]

I know they kick in when the temp gets high. Just over 100   Normal temp is just below 80 but in traffic it slowly goes up to just over 100 then the fan kicks in.