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  1. M

    496mag no start issue.

    Wasn't able to get down to the boat today. Rained out in SC today. New sensors will be in Friday- Saturday.
  2. M

    496mag no start issue.

    Still need to look at filters will check tomorrow, weather permitting and advise.
  3. M

    496mag no start issue.

    Fuel injector condition is still on the suspect list. I have new cool fuel 3 and the old fuel regulator was clean so I'm hoping there no paint in there. I did clean out the fuel line when I changed out CF3 but didn't clean rail or injectors.
  4. M

    496mag no start issue.

    Love em! Grrr
  5. M

    496mag no start issue.

    Fuel pressure shoots up to 39 at key on drops after a bit to 35. After a few days of sitting it drops to 22. Spark is good and confirmed.
  6. M

    496mag no start issue.

    Thanks for all the replies. I have the Rhinda pro diagnostic tool. My mechanic came to look at it today with the CDI computer type scanner. What he found was the MAP sensor, which is a Delphi (not mercury) is throwing off the 555 ECM. We swapped it out but still no start. Confirmed spark too...
  7. M

    496mag no start issue.

  8. M

    496mag no start issue.

    I have a 2006 496 mag (ser. No. ow618...) with DTS, bravo 3 and 555 ECM. Roughly 500hrs. Had an issue last year with the cool fuel 3, which I replaced that turned out to be multi layered. (Bad fuel- so I drained tank, replaced fresh but in April and all ethanol free). Replaced fuel tank pick up...
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