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Injector Opening Time
Posted: Tue Feb 17, 2009 5:21 am
by madman4
How to know the correct InjOpen Time ?
I start my engine with the advocated value (1.0ms) but Idle speed is smoother with 3ms.
How can I determine the "correct" value ? Measure ? Calculation ?
Txh@all
Pat
Re: Injector Opening Time
Posted: Tue Feb 17, 2009 6:08 am
by Matt Cramer
Unless you are running LPG injectors, 3 ms is likely too long - I'm guessing the idle smoothed out because you weren't adding enough fuel earlier. Set the opening time to 1 ms and adjust the idle with the VE table. Then change the number of squirts and see what happens to your AFR. If it goes richer, decrease the opening time; if it goes leaner, increase it.
Re: Injector Opening Time
Posted: Tue Feb 17, 2009 7:20 am
by madman4
Thx U Matt.
No I run pump gas Injector (from VW mexican beetle).
I think that my NB send bad value or may be not function correctly because I read on MT 0.45/0.5v on EGO meter but the exhaust gas mixture feel rich.
Re: Injector Opening Time
Posted: Tue Feb 17, 2009 8:31 am
by john.p.clegg
Matt
Just to clarify,which way do you adjust the number of squirts up or down?
Thanks
John
Re: Injector Opening Time
Posted: Tue Feb 17, 2009 9:04 am
by madman4
I beleive he thinks to increase from 1 to ....
4 squirts being for smoother idling.
Re: Injector Opening Time
Posted: Wed Feb 18, 2009 6:19 am
by Matt Cramer
john.p.clegg wrote:Matt
Just to clarify,which way do you adjust the number of squirts up or down?
Thanks
John
Should have cleared that up - I meant increase the number of squirts. If you decrease them the AFR will go the other way.