Air con & Stalling

[fiestaz]

Hi Guys,

WT Fiesta zetec done nearly 40,000kms has developed an issue.

It appears that when driving with the A/C on, at low speeds. Or even going up my drive way where you need minimal throttle it will stall. BUT not straight away.

For example, and it only just happened now. I was going up my drive way, one wheel at a time up the gutter. Giving it about 800 rpm which has always been plenty to get up without stalling or pinging or just generally being a bad driver to it. Anyway i put the clutch in as i was going up the driveway revs went back to idle, then down to about 300 rpm or less, then back to idle, then back to about 500 rpm then stalled. All this while the clutch is in and i am stationary.

This has happened a number of times in various slow moving situations, such as heavy traffic. All with the AC on.

Im quite worried about this, i know its not my driving, for the last 40,000kms my driving has been exactly the same. Car has 6-7 months warranty left and i'd like to know what it could be. Already been to Ford and they think its fine. no codes logged.

Only thought ive had is a dirty throttle body? otherwise i always run 95-98 fuels and dont thrash it.

Any ideas?

Thanks!