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Hydra Cold Start Issue

Old 05-22-2014, 02:22 PM
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Default Hydra Cold Start Issue

I have a FMII 1.8L with a Hydra Nemesis (2.7) and am running into an odd issue for cold starts.

All my tuning experience is with Cobb ATR, so I'm looking for advice on where to attack the problem, not looking for a one sentence miracle fix (unless that's the case lol).

When I first start the car in the morning, lets say ambient is 75 degrees, it starts up, a little rough, goes to high idle (2k-ish rpm) and then after 4-5 seconds it lowers the idle and just dies. I then start it again and it runs no problem (a little lean at idle when cold is all).

This happens every morning, first start, fires up, runs, dies. 2nd start runs no problem. Is there a certain table that would be correlated to this first start and somehow resolve the issue on the second start? Has anyone ran into this issue before?

Thank you!
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Old 05-22-2014, 04:22 PM
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increase warm-up/post-start enrichment
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Old 06-30-2014, 02:35 PM
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Originally Posted by fooger03 View Post
increase warm-up/post-start enrichment
That did the trick it seems, still working on an idle that leans out until the coolant is fully warmed up. Going to start with those fueling maps next. Thanks for the info
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Old 12-21-2014, 08:20 PM
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Also I think FM adjusted the manifold wetting coefficient from the default of 40 up towards 80-100
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