156 2.5V6 throttle potentiometer problems ?
Hi Everyone, just wanted to say hello and to ask if anyone knows how to tell if the trottle potentiometer is shot on my 156 2.5V6. The car recently had a new engine fitted ( its still being run in but is absolutely perfect ) and ran happily for about 300 miles. It was then left for a week with an interior light on and low and behold, the battery was flat. Up till then, it sttrated first turn and ran perfectly.
Got a jump start and it started easily enough, however, it idles fine but as soon as you touch the throttle, it doesn't rev and chugs ( from cold at least. ) Having looked at the car, it appears that the trottle butteryfly isn't opening at all, although it is not jammed as you can move it manually. What I want to know is, is there a switch on the trottle pedal that activates the trottle butteryfly's ( with drive by wire, I am assuming there is something connected to the trottle pedal that activates the electonic throttle ). Secondly, is there anything else that could cause the problem.
I ask this because just before I went away and left the car standing, the alarm system began to play up, coming on at will. Indeed the alarm system is not working at the moment, just the central locking. I have obviously replaced the battery in the key so I know its not that, so has anyone had this problem before and is it possible the alarm and throttle issue are connected.
I am assuming that the throttle potentiometer is shot because having read other posts, it appears that it should open when you push the pedal down with just the ignition on. Mine is not moving at all.
I know it could [possibly be the MAF sensor, however, if it was that, the trottle butterfly shoudl at least move. I have not checked if there is any power going to the potentiometer yet ( my next job ) but as it was working fine before and the only thing that has happened was a flat battery, I cannot see the connection between the two.
Your help will be greatly appreciated.