big blocks
#21
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Mefi 3 is my injection just broke out my go to book!! Looks like the regulator on the cool fuel system is def in need of use by running off vacuum! Might try to run that somehow not sure how but some how!! And 41-45 psi of fuel which is where my boat runs its best! So at the idle that fuel relay runs on vacuum from motor speed . Makes good sense to me now!! What we strain are brains for a little fun!! Def appreciate all you guys help! Had boats all my life first fuel injected big block!! Never give up!!
Last edited by baja h2x; 09-12-2014 at 11:48 PM.
#23
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Mefi 3 is my injection just broke out my go to book!! Looks like the regulator on the cool fuel system is def in need of use by running off vacuum! Might try to run that somehow not sure how but some how!! And 41-45 psi of fuel which is where my boat runs its best! So at the idle that fuel relay runs on vacuum from motor speed . Makes good sense to me now!! What we strain are brains for a little fun!! Def appreciate all you guys help! Had boats all my life first fuel injected big block!! Never give up!!
Reason is that the injectors are in the intake manifold (thus they 'see' manifold pressure) vs being outside in the atmosphere.
So, yes, at idle without the regulator being vacuum referenced, the injectors will be flowing more fuel then they are supposed to be.