Hi,
just been given a 2005 Jazz 1.4 CVT SE, its been sat for two years as father in law wanted to drive again but has now had to give up. I fitted new battery, and car started, revs went up and down oscillating 700-2000 when in park but otherwise fine, drove to MOT, straight through passed emissions test. guy at garage suggested tapping lightly the throttle position sensor and the idle air supply valve. i tapped TPS with handle of screwdriver and the revs stopped oscillating, but now the idle is low and when cold stalls when put in in D or R, it will just about hold a low idle in D and R when warm. the engine management light has come on code reader says P0122, throttle position sensor.
having read forums there is mention of a broken wire in loom. i have tested the TPS, putting paperclip in back of plug from loom when connected to TPS, it gets a 5v supply ok and the ground at plug ok. the middle pin in plug has no voltage showing whether i turn the throttle wide open or closed.
my question is - is this a sign of a broken wire in loom or a broken tps, and hence i hunt a new throttle body on ebay?
is there a way of testing TPS when unplugged?
thanks for any help in advance