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Thread: B3605 and B4206

  1. #1
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    Default B3605 and B4206

    If B4206 is set to enable and trims are not turned off via coolant temp variables, does it matter what B3605 is set to? Will the short term trims run during OL warm up?

    Basically, I have to set B3605 very lean at lower coolant temps to lean out this big block during warm or it runs very very rich(basically doesn't run) until it is warm and then it runs like a top. Only ran it OL so far and will be setting to engage CL shortly, I just want to make sure that I will get OL trims with B3605 not set to 1. or does B3605 need to be set to 1?

    runs COS1, 05120001. SD only.

    Thanks

  2. #2
    Joe (Moderator) joecar's Avatar
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    OL STFT (B4206) will only operate during OL (regardless of how OL was achieved) and fueling is close to stoich (i.e. B3605 is 1.0 +/- 0.1).

  3. #3
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    Quote Originally Posted by joecar View Post
    OL STFT (B4206) will only operate during OL (regardless of how OL was achieved) and fueling is close to stoich (i.e. B3605 is 1.0 +/- 0.1).
    dang ok.

    that isn't going to work well for me then. I need a way to lean it out when cold that still allows OL STFTs to work.

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