08 Civic Si I/H/E Stock map running lean

FlashPro questions & answers specific to the 2006-2011 Americas Civic Si
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ale2104
Posts: 3
Joined: Fri Jun 24, 2022 8:59 am

08 Civic Si I/H/E Stock map running lean

Post by ale2104 »

Hey guys.

I have a Civic Si 08 with a 3' SRI, 2,5' exhaust and a Blackworks header.

I've just installed flashpro and made some datalogs on stock map.
Well, my problem is: The car can't match AFR corrected with AFR commanded even with ~50%+ S.Trim. Also, I'm getting high duty cycle with stock injectors.

When my tunner tried to do a base map, the just "cuts" near 5k~ rpm.

I don't know what else I could look for.

I'm sending the stock map datalog.

Help me please, thank you.
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ale2104
Posts: 3
Joined: Fri Jun 24, 2022 8:59 am

Re: 08 Civic Si I/H/E Stock map running lean

Post by ale2104 »

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ale2104
Posts: 3
Joined: Fri Jun 24, 2022 8:59 am

Re: 08 Civic Si I/H/E Stock map running lean

Post by ale2104 »

Got a new fuel pump but the car still hitting high duty cycle on wot.
Any ideas what can cause that? Injectors?
I dont know what else I can look.
Jvasqu28
Posts: 11
Joined: Sat May 21, 2022 3:42 pm

Re: 08 Civic Si I/H/E Stock map running lean

Post by Jvasqu28 »

Correct me if I’m wrong but for fuel trims negative means the ecu is pulling fuel and positive means is adding fuel.

Anything above 80-85% duty cycle is considered high for injectors. From what I know most people go FBO on stock injectors but the stock map may be adding to the problem.

First You might want to try checking your maf or upstream o2 sensor. The maf on the intake may be dirty/bad or the o2 may need to be replaced. Also there are maps in hondata that you can choose that are a lot closer. tune wise, to the parts you have that you may want to try running. I believe there is one for intake/exhaust/header.

You may also want to check the condition of your spark plugs, if your running lean they may be white/ have white spots similarly if you were running rich they’d be black or wet
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