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Thread: fuel problems
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06-11-2006, 06:00 PM #1New Member
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fuel problems
hello
i have 1993 2.5 efi 265 hp on a vegas xt , i took it out yesterday, went about 10 miles up river went to leave 2 hrs later , motor would rev up then try to shut down motor would only idle , i idled it for about a hour then i took a pair of pliers and pinchedof the return line . after that it ran perfect all the way to the landing. what is going on. HELP
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06-11-2006, 06:52 PM #25000 RPM
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sounds like bad regulator is it efi ?
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06-11-2006, 07:25 PM #3New Member
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yes it is
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06-11-2006, 07:43 PM #4
The regulator has my vote too. If you had to restrict the flow, that is what the regulator does is "regulate" the flow.
------------'82 Vector - Mercury 2.4 Bridgeport "MOD"
"Life is short - Get there fast...MERCURY"
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06-11-2006, 07:48 PM #5
Unless it's another EFI problem of some kind, perhaps a faulty vaccuum TPI causing it to only be able to idle, but stall when you give it throttle. A bad TPI or MAP sensor could do that. Pinching the return line would raise the fuel pressure to the fuel pump's maximum capability, probably around 60 psi. This would richen the overall mixture any maybe allow it to run. Just a crazy idea. A bad regulator is more likely...
'89 Hydrostream Vegas XT, '90 Merc 2.4 Bridgeport PCU EFI
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06-11-2006, 07:49 PM #65000 RPM
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get a fuel pressure gauge and check your pressure per mercury manuel. this will tell you for sure if its your regulator.