leaning out during idle

Calibrations for S-Manager - Use all calibrations at your own risk (dyno tuning recommended)
Efreng35
Posts: 32
Joined: Fri May 25, 2018 8:52 pm

leaning out during idle

Post by Efreng35 » Sun Dec 09, 2018 8:39 pm

b18c 1050 ID injectors. turbo pump gas. car runs perfec air fuel ratios but after driving has strange leaning out spots once warm after some drive. map and log attached of idle. any help would be really appreciated
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map
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eFREN-stock11.skl
data logged lean spot in graph
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AREA876
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Re: leaning out during idle

Post by AREA876 » Mon Dec 10, 2018 8:24 am

Did you set the injector deadtime?
What's the fuel pressure?

Efreng35
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Re: leaning out during idle

Post by Efreng35 » Mon Dec 10, 2018 10:01 am

Fuel pressure is 45psi yes dead times set. It doesn’t appear to be voltage related according to what I see in the log. I could be wrong

AREA876
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Re: leaning out during idle

Post by AREA876 » Mon Dec 10, 2018 10:24 am

I Also notice the fuel trims are removing around 12% of fuel, was the car tuned in open loop before it was set to close loop?
Lean Mixture.jpg
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Efreng35
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Re: leaning out during idle

Post by Efreng35 » Mon Dec 10, 2018 10:31 am

Yes in open. thanks for the help btw. Ive been trying to figure this out for a while.

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Spunkster
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Re: leaning out during idle

Post by Spunkster » Mon Dec 10, 2018 10:42 am

What wideband are you using?

Efreng35
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Re: leaning out during idle

Post by Efreng35 » Mon Dec 10, 2018 10:50 am

using aem 30-4110 uego

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Spunkster
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Re: leaning out during idle

Post by Spunkster » Mon Dec 10, 2018 11:02 am

When it shows lean there is no real change in injector pulse width or to the fuel trim. This leads me to believe that there may be some other factor. perhaps you have an injector that is sticking at the low duty cycles.

Efreng35
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Re: leaning out during idle

Post by Efreng35 » Mon Dec 10, 2018 11:18 am

gotcha. is there a way for me to test for that ? or anything you recommend I do.

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Spunkster
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Re: leaning out during idle

Post by Spunkster » Mon Dec 10, 2018 3:44 pm

You can have the injectors tested and flowed.

Efreng35
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Joined: Fri May 25, 2018 8:52 pm

Re: leaning out during idle

Post by Efreng35 » Tue Dec 11, 2018 10:30 pm

I noticed when applying electrical load it goes lean and begins to stay leaner as it warms up. But let’s say raising and lowering power windows cause it to go 16.5-17.0 afr . I read INjector dynamics does not supply correct dead times is it possible that’s the problem. Stock fuel pressure regulator Injector Dynamics 1050x injectors

AREA876
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Re: leaning out during idle

Post by AREA876 » Wed Dec 12, 2018 6:38 am

Try running in open loop and note the AF, is it rich or lean?
Also provide a datalog and current Calibration of the open loop operation.

Efreng35
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Joined: Fri May 25, 2018 8:52 pm

Re: leaning out during idle

Post by Efreng35 » Wed Dec 12, 2018 6:53 am

Will do. Do the dead times look ok? Open loop does same thing. I have it in closed loop to help out with the issue it’s worse in open loop

AREA876
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Re: leaning out during idle

Post by AREA876 » Wed Dec 12, 2018 7:01 am

Check fuel pump voltage and fuel pressure

AREA876
Posts: 400
Joined: Tue Jun 15, 2010 6:14 am
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Re: leaning out during idle

Post by AREA876 » Wed Dec 12, 2018 7:16 am

1050X.jpg
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