Originally Posted by RScrew69
ok just had a look at it quickly and done as u said with ignition on oressed accelerator pedal and it goes up nice and comes back down nice and smooth on the secs monitor.
I have noticed something else recently aswell whilst idling. The car was idling and the reading of 950rpm 900rpm sometimes it was coming up with nothing 000rpm, then u drive and it starts working again.
what could cause this to happen?
Sounds like your TPS is probably OK.
It's more likely that you need to have words with the ISCV, which is only held down with two screws and a retaining 'ring'. Pop that off and leave it connected - get an assistant to turn the ignition on (but not start the engine) and watch the piston(?) - it should move in and out quite quickly, and you should hear it ticking as it moves. If it does that OK, it's probably OK but just needs cleaning. If it doesn't move it's either completely gunked up or knackered. Either way, disconnect it and take it indoors - spray some carb cleaner in it and watch the black gunk dribble out
give it a couple of shots and leave it to dry for half an hour and refit it. Don't lose the screws or retaining ring
My rev counter started doing that a while ago - now it's 'off' more often than it's on
, and will drop down to zero from any speed, randomly. It's a gauge fault normally, or could be a poor feed to the counter.
As yours comes back up again when the revs pick up it's more likely a loose/poor connection than a gauge fault.