Hope someone can help...
I had a new inlet gasket fitted to the saph today to cure the 3 cylinder idle and misfire.
Driving back, the car has developed a new fault.

Under hard acceleration - ie full throttle, you get about 3 seconds of boost, then a sudden *cough*. car lurches,then back on boost.
Anything other than full throttle is fine.
Someone told me i've got a 2wd throttle position sensor on a 4wd car.
How can I tell?
Any ideas / sugestions appreciated!