Hello all

I have a Signum 1.9CDTi(150) Auto on a 56.

When I turn the A/C on, I find it is very sluggish pulling away. If I'm dawdling along at 5/10/15mph in slow traffic, approaching a roundabout or such like, then I suddenly accelerate to pull away, I find it does not change down gear unless I force the issue with the kickdown, and accelerates like a 50cc moped, on occasion accompanied with a whoooooshing sound - not turbo whoosh (I know the turbo hose is intact as have had it checked), more like the engine fan noise you get from those big nissan or toyota 4x4 monsters......on occasion it's left me in a bit of a pickle not being able to get away quick enough and nearly having someone in my side!

If I have the A/C off, no issue.

Some might say the A/C saps power from the engine, but I owned a VW PAssat Estate previously, and at 105BHP, there was no discernible difference in engine power with A/C on or off.

Any ideas??

Also, in other auto cars I've driven, the gear will change up to 4/5 when just doing 30mph as long as i'm cruising at said speed and not accelerating, but this box won't change into 4th until it hits 40mph. If I move over to manual mode, I can force it into 4th and it drives fine, and accelerates okay in 4th in the 30-40 range. If I move back to full auto, even at 39mph, it drops back down to 3rd gear.

Could the two problems be linked? I don't know, i'm a luddite when it comes to car mechanics!

Thank you in advance!

Jon.

Edited by jwturpin on 10/09/2012 at 20:07