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post #1 of 15 (permalink) Old 10-03-2009, 03:07 PM Thread Starter
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injector cup or ...

ok so i got fuel goin into the water, no biggy this motor is comin out in 2 or 3 weeks. but i have noticed something very strange that makes no sense, or at least to me. no fuel gets in the water when its idling or even when i drove it to work the other day and was easy on it. the only time fuel gets in is going down the track, and in the 12 sec or so it takes the level in the jug goes up by about and inch or inch and a half. now i am goin by cold level and then checking it the day after a pull to make sure its cold. so anyone had a cup act like that or could it be a crack in the head?

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post #2 of 15 (permalink) Old 10-03-2009, 06:05 PM
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Re: injector cup or ...

Things that make ya go hmmmmm.....
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post #3 of 15 (permalink) Old 10-03-2009, 09:52 PM Thread Starter
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Re: injector cup or ...

its just wierd that around 2qts or more of fuel gets in the water in a matter of 12sec but none driving it for 20min easy.

1996 F-250 ex-cab -D60- Motor,fire hoses-Nate,Tuning,Cam-Matt R,P-rods,dummy plugs-Wipe Out,Huffer-Engineered diesel,Carson,Gen3,Idm-Swamps,Rods,studs,fire rings-WOP,Clutch-Valair
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post #4 of 15 (permalink) Old 10-03-2009, 10:47 PM
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Re: injector cup or ...

Sounds like a cracked cup to me. Pull your fuel lines off on each head(supply and return), plug one off and put compressed air into the other. With the resevoir cap off you should be able to hear air bubbling thru the resevoir. Repeat for the other head and then at least you will know which side is causing your problems.


Good luck
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post #5 of 15 (permalink) Old 10-04-2009, 02:34 AM Thread Starter
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Re: injector cup or ...

but why only on the track and no time else?

1996 F-250 ex-cab -D60- Motor,fire hoses-Nate,Tuning,Cam-Matt R,P-rods,dummy plugs-Wipe Out,Huffer-Engineered diesel,Carson,Gen3,Idm-Swamps,Rods,studs,fire rings-WOP,Clutch-Valair
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post #6 of 15 (permalink) Old 10-04-2009, 02:49 AM
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Re: injector cup or ...

Heat/flex?
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post #7 of 15 (permalink) Old 10-04-2009, 03:19 AM
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Re: injector cup or ...

Quote:
Originally Posted by 907DAVE View Post
Heat/flex?


I fear you may have a cracked head.
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post #8 of 15 (permalink) Old 10-04-2009, 03:53 AM Thread Starter
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Re: injector cup or ...

thats what someone mentioned to me so i figured i would see if anyone else has seen this happen. thanks guys. ill post what i find once i get the motor out prob late this month.

1996 F-250 ex-cab -D60- Motor,fire hoses-Nate,Tuning,Cam-Matt R,P-rods,dummy plugs-Wipe Out,Huffer-Engineered diesel,Carson,Gen3,Idm-Swamps,Rods,studs,fire rings-WOP,Clutch-Valair
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post #9 of 15 (permalink) Old 10-04-2009, 03:55 AM
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Re: injector cup or ...

Golfer, would you be able to verify where the crack is with the head off(via magnaflux)?
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post #10 of 15 (permalink) Old 10-04-2009, 04:09 AM
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Re: injector cup or ...

Quote:
Originally Posted by 907DAVE View Post
Golfer, would you be able to verify where the crack is with the head off(via magnaflux)?
probably...

but *I* wouldn't pull the engine until I exhausted all efforts to find it while the engine is still in the frame.

I have only seen one cracked head that put fuel in the coolant, and is was visible, once the injectors were pulled and the coolant system was pressurized.

took lots'a eyes and lots'a flashlights peeking around.

If you have the VC's off, you can see the fuel rail "bump" that runs the length of the head...it's in line with the lower rocker pedestal bolts.

Do you have any fuel in your oil? (even if you did, with as little "mixing" you have happening...you may not notice w/o oil analysis)
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