Ewenm
NAXJA Forum User
- Location
- Gold Coast Australia
94 xj limited, OBD1
it has an off idle hesitation, once warmed up its ok, then if i let it sit, its bach again
with this it does this thing where its like raves up 500rpm and then drops, revs up again, if i let it idle its ok, if i rev it over 2000 rpm its ok, once its running its generally ok.
I've changed the coil, spark plugs, changed the TPS twice, checked for a earth to the TPS checked the 5 volts, checked for just under 1 volt at idle and checked for a smooth increase in voltage with an analogue meter, checked resistance also, and it seems ok
I've replaced the IAC and that made no difference,
I've checked for vacuum leaks, and there doesn't seem to be any,
the crank angle sensor has been replaced a few years ago.
I'm at a loss as to know where to go next,
any ideas???
it has an off idle hesitation, once warmed up its ok, then if i let it sit, its bach again
with this it does this thing where its like raves up 500rpm and then drops, revs up again, if i let it idle its ok, if i rev it over 2000 rpm its ok, once its running its generally ok.
I've changed the coil, spark plugs, changed the TPS twice, checked for a earth to the TPS checked the 5 volts, checked for just under 1 volt at idle and checked for a smooth increase in voltage with an analogue meter, checked resistance also, and it seems ok
I've replaced the IAC and that made no difference,
I've checked for vacuum leaks, and there doesn't seem to be any,
the crank angle sensor has been replaced a few years ago.
I'm at a loss as to know where to go next,
any ideas???