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It is currently Fri Apr 10, 2026 2:43 am
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[ 5 posts ] |
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Figured out reason for slow 37efi with low RPMS finally
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JphIII
MMT Pro Member
Joined: Sun Nov 02, 2014 8:23 am
Posts: 308
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 Figured out reason for slow 37efi with low RPMS finally Finally! I'm glad I'm not a crazy person. Had to send motor back down to PD as it wouldn't get above 4k rpms under light load. I had the valve covers off previously and mentioned that #2 cylinder lifter was not rising as much as the other lifters. As soon as KP got motor hooked up in water he heard the sound I've been referring to and saw the lifter issue. Turns out the cam lobe profile was bad (ground off, chipped, or something) and was preventing the intake valve from opening all the way which resulted in the lack of power. Anyway fingers crossed, should replace the engine bc they won't be able to get all of that metal out down there.
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PD 1754 X Series and a PD 37EFI
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| Tue Oct 04, 2016 1:55 pm |
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JphIII
MMT Pro Member
Joined: Sun Nov 02, 2014 8:23 am
Posts: 308
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Re: Figured out reason for slow 37efi with low RPMS finally All sorted out now, boats running 28-29 with me cooler dog and normal fishing gear. Just have a worked prop and voodoo, happy with the end results.
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PD 1754 X Series and a PD 37EFI
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| Mon Oct 17, 2016 5:36 am |
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Gigafowl
MMT Elite Member
Joined: Tue Jan 13, 2009 7:19 pm
Posts: 6441
Location: Trinity Bay - Texas
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Re: Figured out reason for slow 37efi with low RPMS finally Good deal - sounds like they took good care of you !
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Eat - Sleep - Hunt ! ! !
"It is good to have an end to journey toward; but
it is the journey that matters, in the end."
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| Mon Oct 17, 2016 5:47 am |
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woodie_slayer
MMT Pro Member
Joined: Tue Apr 07, 2015 7:16 pm
Posts: 77
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Re: Figured out reason for slow 37efi with low RPMS finally What kind of rpms are you turning now?
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| Mon Oct 17, 2016 6:33 am |
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JphIII
MMT Pro Member
Joined: Sun Nov 02, 2014 8:23 am
Posts: 308
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Re: Figured out reason for slow 37efi with low RPMS finally 4300-4450
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PD 1754 X Series and a PD 37EFI
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| Mon Oct 17, 2016 10:33 am |
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