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leaning out during idle

Posted: Sun Dec 09, 2018 8:39 pm
by Efreng35
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

Re: leaning out during idle

Posted: Mon Dec 10, 2018 8:24 am
by AREA876
Did you set the injector deadtime?
What's the fuel pressure?

Re: leaning out during idle

Posted: Mon Dec 10, 2018 10:01 am
by Efreng35
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

Re: leaning out during idle

Posted: Mon Dec 10, 2018 10:24 am
by AREA876
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
Lean Mixture.jpg (375.45 KiB) Viewed 1250 times

Re: leaning out during idle

Posted: Mon Dec 10, 2018 10:31 am
by Efreng35
Yes in open. thanks for the help btw. Ive been trying to figure this out for a while.

Re: leaning out during idle

Posted: Mon Dec 10, 2018 10:42 am
by Spunkster
What wideband are you using?

Re: leaning out during idle

Posted: Mon Dec 10, 2018 10:50 am
by Efreng35
using aem 30-4110 uego

Re: leaning out during idle

Posted: Mon Dec 10, 2018 11:02 am
by Spunkster
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.

Re: leaning out during idle

Posted: Mon Dec 10, 2018 11:18 am
by Efreng35
gotcha. is there a way for me to test for that ? or anything you recommend I do.

Re: leaning out during idle

Posted: Mon Dec 10, 2018 3:44 pm
by Spunkster
You can have the injectors tested and flowed.

Re: leaning out during idle

Posted: Tue Dec 11, 2018 10:30 pm
by Efreng35
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

Re: leaning out during idle

Posted: Wed Dec 12, 2018 6:38 am
by AREA876
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.

Re: leaning out during idle

Posted: Wed Dec 12, 2018 6:53 am
by Efreng35
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

Re: leaning out during idle

Posted: Wed Dec 12, 2018 7:01 am
by AREA876
Check fuel pump voltage and fuel pressure

Re: leaning out during idle

Posted: Wed Dec 12, 2018 7:16 am
by AREA876
1050X.jpg
1050X.jpg (63.92 KiB) Viewed 1225 times