Engine Shut Off Valve - operation and location?
I am sure there is going to be someone on here that will answer this. I have a problem with jerking (kangarooing) only at part throttle and have been asked whether or not the shut off valve is functioning correctly. I have no idea where this is and whether or not sticking of this valve could have this effect. To elaborate, the car will run perfectly fine at both idle and full load, but very light throttle and at about 1000 - 1400 rpm, it really does jerky quite violently! If it begins to jerk, flooring it or coming off the throttle temporarily sorts it out. Of course if you are in traffic and simply want part throttle to keep up with the rest of the pack, flooring then coming off (or vice versa) is not really enjoyable not to mention slightly dangerous!
If anyone has any idea where this part is (picture, web link, description) and whether it could be at fault, PLEASE let me know! I do a 135mile round trip commute each day and so it does get a little tiring.
If however, this fault is due to something COMPLETELY different to this shut off valve, please feel free to give any other suggestions.
oh yeah and the car is:
156 2.4JTD (136) Manual