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Mercruiser 454 magnum mpi starts then dies.

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Old 02-25-2024 | 01:55 PM
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Originally Posted by F-2 Speedy
if you remove the gauge and start it is there fuel at the valve when it dies......air will move the pressure gauge also....
Yes, there is
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Old 02-25-2024 | 02:46 PM
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Is there a chance the ecm isn't seeing the oil pressure switch and shutting it down, did you use Teflon tape on it and its not grounded properly
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Old 02-25-2024 | 03:00 PM
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Update, I am able to keep the engine running by lightly running the throttle up and down. However it will die when returned to Idle of if held at a constant throttle position
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Old 02-25-2024 | 03:12 PM
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Do you have a scanner, tps plugged in
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Old 02-25-2024 | 03:27 PM
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New injectors
Why were they replaced?
Where did you get the injectors?

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Old 02-26-2024 | 07:00 PM
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Originally Posted by AllDodge
Why were they replaced?
Where did you get the injectors?
Old injectors were so corroded they fell abart. Got the new ones from amazon
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Old 02-26-2024 | 07:45 PM
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Originally Posted by Rbrown
Old injectors were so corroded they fell abart. Got the new ones from amazon
Well, the amazon injector route doesn't sound very promising to me. Get ahold of Arcticfriends (Steve) - he will have some injector options for you. There is more than a few ways to mess these old injectors up.
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Old 02-26-2024 | 08:27 PM
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Originally Posted by Rbrown
Old injectors were so corroded they fell abart. Got the new ones from amazon
you have a link for said injectors ?
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Old 02-26-2024 | 08:33 PM
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Originally Posted by SB
you have a link for said injectors ?
I do not, however they are identical to the ones removed. Same numbering on them as the ones removed.1
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Old 02-27-2024 | 06:09 AM
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The problem is amazon and ebay in most all cases are not any good. They are failed injectors that are cleaned up and resold. As liquidlounge mentioned, contact Articfriends and get them tested
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