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Thread: Injector pulse width & duty cycle

  1. #21
    Lifetime Member swingtan's Avatar
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    As I mentioned before, once you max out the MAF tables for either Frequency or gm/Sec, you loose all metering control for fuel. The PCM will stick to the maximum limit for air flow, even though you may actually be getting way more. In this condition, IDC/IPW will remain static and exhaust AFR's will lean out. My choice would be to go full SD and dump the MAP. It fixes both the frequency and gm/Sec limit.

    Simon.

  2. #22
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    That is what i thought would have to be done. I have a 2 bar map for it but i couldn't get it to calibrate correctly, it would idle for a bit then over fuel at idle. I might not have the right map sensor.
    David McLain
    www.etdrag.com

  3. #23
    Lifetime Member swingtan's Avatar
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    What did the log show when this happened?

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  5. #25
    Lifetime Member swingtan's Avatar
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    That's the tune....... :p

  6. #26
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    David McLain
    www.etdrag.com

  7. #27
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    Well the custom os and a 2 bar sensor fixed all the issues. a/f of 11.2:1 all the way to 6200 RPM's great, that custom os is easy to tune just like a dfi system but the wideband isn't built into the data log. I know you can wire it into the log though. I had to turn off the stft and ltft they seemed to be very far off of each other. They didn't jive at all with what the o2 sensor was saying. Not a problem though just used the o2 on the dyno.
    David McLain
    www.etdrag.com

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