Auto box dropping Revs

SAN XL · Apr 27, 2010

Hi Guys

I know this will end up being expensive- it always is !!

Anyway here goes -

I've noticed recently that whenever I move the gear selector from Park to Drive or Drive to Reverse the RPM drop really low - as though its about to stall, then bounce back up again, and become settled?

Any reason for this ?

and should i be concerned this could lead to something expensive ??

The car is a year 2000, P38, 4.6,

Thnaks as always

The Mad Hat Man · Apr 27, 2010

Check oil levels first. Maybe an oil change?

jwaldron · Apr 27, 2010

what deos she idle at to atart with, what does she drop to and what does she settle out at after?

rayc · Apr 27, 2010

Sounds like the stepper motor for the idle control wants cleaning.

Dont know where it is on a thor engine though. I've just done my Gems engine one and it made such a difference to the car.

g15ost · Apr 27, 2010

wheres the stepper motor on the Gems engine?

rayc · Apr 27, 2010

It's under the throttle position sensor on the side of the metal casing with the throttle butterfly. held in by 2 x 8mm bolts

SAN XL · Apr 28, 2010

Thanks chaps for the replied so far

The precise figures are such - it idles nicely at 800, then when Drive or Reverse are selected from Park, it will drop to 400-500 then pick/ bounce back up again?

Seems totally bizarre,

Thankfully its hasn't stalled as yet but it seems as though it will any moment - imagine the embarrassment me with my blingy ( or as wife calls them chav) wheels and the car stalls !! -LOL

Auto box dropping Revs

SAN XL

New Member

The Mad Hat Man

Well-Known Member

jwaldron

New Member

rayc

New Member

g15ost

New Member

rayc

New Member

SAN XL

New Member

Similar threads