[Ducati] 748 Throttle body adjusting - air bypass screws

John Sheerin jsheerin at hughes.net
Thu Jul 13 21:48:19 EDT 2006


I'm working on syncing the throttle bodies on my 748.  I checked the TPS,
adjusted the idle screw a bit to get it set at 300mV, and set the vacuum
equal with the air bypass screws all the way in.  Now I'm working on turning
the bypass screws out to set the idle.  When I started, the screws were out
about 3/4 of a turn out.  I turned them in all the way while setting vacuum
(idle speed went down).  I have them 2 turns out now.  There didn't seem to
be much difference between 1 turn and 2 turns in terms of how fast it idles.
Is there an optimum setting in there somewhere?

When turning the screws out, are you going for the same number of turns on
each and still checking to make sure vacuum is the same?  Or would you be
looking both those plus CO levels in each cylinder?  I don't have a CO
meter - I've been trying to find a local shop with one, but no luck so far.
Anyone have any tips on that?  Anyone know how to make your own CO detector?

Thanks,
John
http://ldsg.snippets.org/HORNS/





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