Sonic Boom

iTrader: (11)

I know this is going to sound daft but when your off the throttle should the butterfly on the throttle body be completely shut? Or should it be slightly ajar?
3 Door Cossie if it makes any difference.
Cheers Rich

pacwest

My data logging shows my throttle opens %4 at idle by vacuum alone.

tabetha

As good as closed, but there is a tiny tiny gap, this is so it doesn't cause a sticky action when moving from rest.
tabetha

grcossie

This depends on TPS setting, and not exactly the butterfly posistion.
Mine also read 4% on secs monitor, but this is how adjust my TPS

Sonic Boom

iTrader: (11)

It's just I had the throttle body off and noticed it wasn't shut fully when closed so I adjusted it to being fully closed, butterfly is a tight fit and doesn't let anything through (checked it with brake cleaner) But now i've re fitted it the idle control valve has gone barmby tring to hold the car at 2500rpm all the time, it's fine if you unplug it. I haven't driven it on the road yet.
Rich

grcossie

You must not adjust butterfly stopp screw, this should be at factory set.

tabetha

It is NOT supposed to be fully shut, you will have problems if fully shut.
tabetha

Sonic Boom

iTrader: (11)

Ok i'll re-adjust then
Rich