HELP! I have a 2002 pre production 2003 S Type R (4.2L with Eaton supercharger) runs well, just had a tranny service and software update, however there seems to be a dead spot in the throttle (it was there before tranny service) when I am crusing on the freeway and want to accelerate/kickdown to over take etc, car takes a deep breath?, howls then it goes into limp home mode. gear box fault on dash! Revs around 2000-3000 depending on speed at the time of acceleration.Stop car, turn off ignition, restart all OK. Got me stumped. Anyone else had a similar problem.

 

When this happens do you get a check engine light? if so check the code before you restart, then you can diagnose.

 

No there is no check engine light, just the orange/amber light to the left of the LCD display comes on and "gearbox fault" in the LCD.
I did read on another site that it may be a vacuum leak somewhere?
I cant check it at the moment, a #*@)!* L plater drove into the side of my car the other day and its in the smash repairers at the moment.

 

Howl fixed,gear change fixed.
I think it was a combination of a good clean (throttle body, took 2 mins) and more to the point, the battery was old and not holding a charge, replaced battery, reset codes all ok, no probs now for over 2 months.I have been told before that if you get"wierd" probs with an STR check the electrics first. Thanks for you help

 

Glad you got her fixed Jim.
My clue to a battery change was an observation by members of this great forum noting that erratic auto up/down window operation can be an early warning for a battery problem. Since mine was almost 6 years old I changed it and it fixed the window problem and probably saved many an ulcer too.

Happy trails !!!!!!!!!!!!!!