Injector Opening Time

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madman4
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Injector Opening Time

Post 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
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MSII on V3.0
2.88 code
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Matt Cramer
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Re: Injector Opening Time

Post 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.
madman4
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Re: Injector Opening Time

Post 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.
Have a Right Foot ???
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MSII on V3.0
2.88 code
my ride
john.p.clegg

Re: Injector Opening Time

Post by john.p.clegg »

Matt

Just to clarify,which way do you adjust the number of squirts up or down?

Thanks
John :)
madman4
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Re: Injector Opening Time

Post by madman4 »

I beleive he thinks to increase from 1 to ....
4 squirts being for smoother idling.
Have a Right Foot ???
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MSII on V3.0
2.88 code
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Matt Cramer
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Re: Injector Opening Time

Post 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.
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