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Thread: E38 Gen4 Big cam running 12 afr at idle and won`t change

  1. #1
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    Default E38 Gen4 Big cam running 12 afr at idle and won`t change

    Good Morning Gents/ladies I have put a big cam in my gen4 and I can`t get the idle to be leaner then 12 afr. I have tried allot of different things to no resolve. The log says the afr is commanded at 14. something but the wide band is saying 12 afr. I have dialed the vve in also. Could someone point me in the right direction please? Cheers
    Log_0003.efiE38 fd man ._0156.ctzClick image for larger version. 

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  2. #2
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    Hiya,
    I'll look at your file later tonight and see if anything jumps out. What injectors do you have?
    Off topic but curious, does that cam make a lot of valvetrain noise?

  3. #3
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    Quote Originally Posted by In-Tech View Post
    Hiya,
    I'll look at your file later tonight and see if anything jumps out. What injectors do you have?
    Off topic but curious, does that cam make a lot of valvetrain noise?
    Hi thanks for the reply , The valve train doesn`t make much noise , but I haven`t heard a stock engine for a while. I`m making a bit of head way . On p0101-3 i set to 1 trip and no mil , and now when I start the engine the afr goes from 14.6 afr and slowly richens up to 12 afr over about 5 seconds. Thanks for having a look.

    E38 fd man ._0159.ctz

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    I haven't updated to the latest efilive software and can't look at your file. Just off the top of my head I would have a look at your min inj pw. If it is an aftermarket wiring harness, the injector offsets will have to be changed and a lot more if the injectors are not stock.

  5. #5
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    In-tech.... it's a locked auto-cal file.

    I guess his tuner is going to have to sort this mess out by himself.

  6. #6
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    Thanks statesman. I don't usually spend much time looking at others' tunes, so Lucy says thanks for 'splaining. Most times if altered I just start over with a stock file and go from there
    -Carl

  7. #7
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    Update all fixed.

  8. #8
    Joe (Moderator) joecar's Avatar
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    What fixed it?

  9. #9
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    Quote Originally Posted by joecar View Post
    What fixed it?
    Pulled about 45% out of the ve table also changed b0146. Still working on cold start atm runs like a hairy Bill Goat when you start it for 20 seconds or so.
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