Quote Originally Posted by SIKCVC
On my way home, i tried reseting the problem by switching the engine off... and it worked for a short time. I tried it a second time at a set of lights, when i went to start it, The engine check light stayed on and the fuel pump wouldn't switch on to prime the engine. I tryed a couple more times and the light went out and the pump primed.
This happens sometimes if you turn off the ignition then back on too fast.. it kinda startles the system and it spit's the dummy.. as you found out, just give it a minute and she'll be OK..

as for your drop in power, when you comming DOWN hill, yout thottle is shut thus not letting in much cool air, therefore the intake manifold and TB will soak up a LOT of heat from the Motor that usually is dispersed by the constant flow of cool intake air through an open throttle.

a HOT intake manifold and intake can drastically effect the 'power' of your engine, and if the intake air is hot, the motor will run leaner which can be less 'power' again..

now as ECU man has correclty asked about your leads.. well a tired ignition system, over advanced timing, or even retarded timing, fouled plugs or work leads can also cause a drop in power. add heat into the equasion from some hill driving, and you end up with big drops in power.