your hoses should go straight from the inlet ports to the IACV. I have a tee in one to feed the scotoiler.
Hi dichoso what does the adjustment in TuneECU for the idle adjust actually do? I tried setting it from -15 to 15, it was a touch low idle at -15, and a touch high at 15, but its not happy very much anywhere. also, how does this combine with the idle fuel trim to change idle speed?
its a 2000 sprint st, but no closed loop system, a 49 state bike, not california or europe emissions.Hi dicho
I had a great discussion with d'eccosse and tom (tuneecu) on the settings here http://www.triumphrat.net/ecm-and-fi-tuning-help-tips-and-tricks/197948-1999-mc2000-sprint-st-tuneecu-trim.html#post2139829
All the info you need is posted there mate, but for speed it sounds like the -15 to 15 you are setting is in the test tab for adjust iacv ? if so all you are doing is adjusting the position of the stepper motor. The stepper motor allows air to flow into the throttle bodies at idle, so when on a run the setting you are talking to will not affect anything, only at idle. The idle fuel trim CO is a made up value (not a real percentile) as it happens mine was pretty close to the real CO emissions. If i was you i wouldn't mess if you don't have access to a gas analyser esp if the bike is running fine.
**Note the bike has to be at operating temp before the settings will take. If you have a newer sprint 2000 on(non mc2000 ecu) with a closed looped system, then messing around with the idle fuel trim won't help, the ecu will just re adjust your settings. (Easy way to tell is if it the exhaust has a lambda sensor its the newer closed loop).
Hope i haven't muddied the waters here.......