help ? afr rich when crusing and bucking. tunerpro

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Commylife
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help ? afr rich when crusing and bucking. tunerpro

Post by Commylife »

can anybody help, i have started making small changes on my nvram for vs turbo. its a v6...
im still trying to figure out the fuel tables, i have set target afr and im using the pin a5 input for wideband, the small changes ive made are for manual trans, lean cruise and fans. if anyone can help me with pulling some fuel out of normal driving and if thats the reason its bucking arouind
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Re: help ? afr rich when crusing and bucking. tunerpro

Post by Charlescrown »

Are you using 12P? If so post a log.
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Re: help ? afr rich when crusing and bucking. tunerpro

Post by hsv08 »

Commylife wrote:can anybody help, i have started making small changes on my nvram for vs turbo. its a v6...
im still trying to figure out the fuel tables, i have set target afr and im using the pin a5 input for wideband, the small changes ive made are for manual trans, lean cruise and fans. if anyone can help me with pulling some fuel out of normal driving and if thats the reason its bucking arouind
A log as above would be beneficial as well as your bin.
However, What changed did you make to the lean cruise?
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Re: help ? afr rich when crusing and bucking. tunerpro

Post by antus »

2 bar map? and have you set the flags for it and using 11p or 12p? agree, more info needed. whats changed on the car to support boost, what program (11p or 12p?) computer type and logs and bin would help. Generally speaking you would be updating the VE table for fuel to describe how the engine is breathing, not the target AFRs.
Have you read the FAQ? For lots of information and links to significant threads see here: http://pcmhacking.net/forums/viewtopic.php?f=7&t=1396
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Re: help ? afr rich when crusing and bucking. tunerpro

Post by vlad01 »

Bucking is normally when it's too lean.
I'm the director of VSH (Vlad's Spec Holden), because HSV were doing it ass about.
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Re: help ? afr rich when crusing and bucking. tunerpro

Post by Commylife »

thanks for the replies lads wasnt expecting them so fast..
i am using vs-sc-v6 enchanced with standard maff
i have got a wideband and cruising at 60 or 80 is my wideband displays anwhere from 10.8 - 11.2 thats with the spartan wideband
turbo is gt3582 im only running 8 pound as i want to learn some more tuning basics. is it worth just changing ecu and loom and use 11 or 12p ?
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Re: help ? afr rich when crusing and bucking. tunerpro

Post by antus »

Im sure your going to get answers both ways on that question, but personally I wouldnt change it. The earlier 14.7 gear outputs a couple of set AFRs at power on for you to verify you see the right settings in tunerpro. Is this still on the later kit and can you check that? Once you trust the data, then if you post bins and logs you should be able to get some help.
Have you read the FAQ? For lots of information and links to significant threads see here: http://pcmhacking.net/forums/viewtopic.php?f=7&t=1396
Commylife
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Re: help ? afr rich when crusing and bucking. tunerpro

Post by Commylife »

righto where and how do i verify
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Re: help ? afr rich when crusing and bucking. tunerpro

Post by immortality »

Do you still have the factory narrow band O2 sensors fitted? Does it go into closed loop mode?
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Re: help ? afr rich when crusing and bucking. tunerpro

Post by Charlescrown »

I doubt it can go into closed loop with those pig rich figures. Get back to basics and check your fuel pressure before trying to tune it.
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