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Old 02-20-2012, 04:37 AM
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need 6.0 motor help!!plz

well here we go ...i have a 05 f550 we put new injectors in, got it all done and it ran great for a few weeks , now it died yesterday and got it to start and run but then it dies right back out. checked voltage on the ficm that was low ,fixed that so now i hae 48 koeo and cranking, but for some reason it wont turn over right now cause its locking up[like hydro locked] . i can bar it back by hand and get it to turn over again but then it does it again...any ideas
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Old 02-20-2012, 05:12 AM
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Pull your valve covers and check your push ods and rockers are seating correctly. A push rod if ya missed the lifter and is against the block can stop it.

Next pull the glow plugs to releive pressure. If it is hydro-locked when you roll it over again it will blow the liguid out of the bad cylinder.

If neither helps it is something in the bottom end.
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Old 02-20-2012, 07:39 AM
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well i looked into it further found that its putting compression into the fuel system....what could that be...
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Old 02-20-2012, 07:46 AM
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Quote:
Originally Posted by junkinjoe View Post
well i looked into it further found that its putting compression into the fuel system....what could that be...
Remove the secondary fuel filter and cap. Cycle the ignition key from OFF to RUN (to fill the secondary empty fuel filter housing with fuel), and then back to the OFF position. Crank the engine over using the jump starter (single yellow with green stripe coloured wire on the passenger side of the engine compartment, just above the vacuum pump with the "squeeze and pull" type connector. Disconnect the two halves and jump the male end to the passenger side battery positive terminal to crank the engine over). Check for presence of bubbles in the filter housing to isolate which bank of cylinders you have compression leaking into. Once you have pinpointed that, you may need to remove all four injectors from that bank to determine the cylinder that's leaking compression into the fuel system.
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