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Thread: SD Tune is Hard Starting After a Battery Disconnect

  1. #1
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    SD Tune is Hard Starting After a Battery Disconnect

    I'm having a hard time starting my car after a battery disconnect on a 2006 Pontiac GTO 2 Bar SD tune. The MAF is removed and I think it's not going into speed density mode until it starts and dies around 5 times, then it's fine until I disconnect the battery and the cycle repeats. Can someone help me with this tune and please be advised that I'm not a tuning genius. I just want the MAF to fail immediately and go into SD mode so it starts easily. Thanks
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  2. #2
    Senior Tuner SultanHassanMasTuning's Avatar
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    gonna take a look at whats going on...
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  3. #3
    Senior Tuner SultanHassanMasTuning's Avatar
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    do you have a different map sensor installed?

    MAKE your maf mil on second error

    max your dynamic airflow not zero as you have it

    also you need to write entire
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  4. #4
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    I have a Cobalt SS 2 BAR MAP installed; Part number: 12615136
    I set 101, 102, 103 to maf mill on second error
    I set dynamic airflow- high rpm disable to 3600 and high rpm re-enable to 3500. Is that right?
    Last edited by Johntall; 08-31-2013 at 06:57 AM.

  5. #5
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    Quote Originally Posted by SultanHassanMasTuning View Post
    do you have a different map sensor installed?

    MAKE your maf mil on second error

    max your dynamic airflow not zero as you have it

    also you need to write entire
    Quote Originally Posted by Johntall View Post
    I have a Cobalt SS 2 BAR MAP installed; Part number: 12615136
    I set 101, 102, 103 to maf mill on second error
    I set dynamic airflow- high rpm disable to 3600 and high rpm re-enable to 3500. Is that right?

    This is all wrong if you're trying to set for a SD Tune.

  6. #6
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    Can you explain how to make the MAF fail at key-on. My car is very hard to start when I reconnect my battery which I think is caused by the MAF not failing at key-on and it's not going into speed density until around 5 tries to start it. It just starts for a second and dies.

  7. #7
    Senior Tuner SultanHassanMasTuning's Avatar
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    did you make the changes we told you about, and also if your Map sensor stock or changed?

    does it work on MAF i see you maxed your injector IFR, what injectors you have in?
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  8. #8
    Senior Tuner SultanHassanMasTuning's Avatar
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    sorry make it mil on first error for the maf under diagnoses

    make sure you do a write ENTIRE not just write. under flash select write entire.
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  9. #9
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    I have Magnacharger TVS2300 60lb green injectors (they came with the blower from the factory). I have a Cobalt SS 2 BAR MAP installed; Part number: 12615136; I made the changes and it started on the first try (it never started right up after the entire rewrite, it always took 5 tries). I disconnected the battery for 10 minutes and it also started on the first try. I disconnected the battery again and I'll let it sit until Tuesday and try it. If it starts on the first try, I'll be very happy. Do I need different injectors? Thanks.
    Here is the current tune that I flashed. Please go-over it and detail anything else that needs to be changed. Thank you.
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    Last edited by Johntall; 09-01-2013 at 11:17 AM.