Need help bleeding air from fuel rail after ejector change, 1995 7.3L - PowerStrokeNation : Ford Powerstroke Diesel Forum
 
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post #1 of 5 (permalink) Old 06-06-2017, 01:39 PM Thread Starter
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Need help bleeding air from fuel rail after ejector change, 1995 7.3L

I had a miss on one cylinder and found an ejector not working. I replaced it after watching a couple videos, but none show how to bleed the air out of the fuel rail.



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post #2 of 5 (permalink) Old 06-06-2017, 02:47 PM
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Re: Need help bleeding air from fuel rail after ejector change, 1995 7.3L

Don't think you need to.

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post #3 of 5 (permalink) Old 06-06-2017, 02:53 PM
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Re: Need help bleeding air from fuel rail after ejector change, 1995 7.3L

exactly
You should fill the Hpop if its low, hand fill the oil rails on top of heads, fill fuel bowl with diesel and start cranking the starter..

Once it is running warm it up and start driving. It may take a few miles for it to clear up the smoke and idle...purging the air from the fuel system requires you to DRIVE the truck up to 50 miles UNDER LOAD...no amount of idling will purge the air.

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post #4 of 5 (permalink) Old 06-08-2017, 10:46 AM
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Re: Need help bleeding air from fuel rail after ejector change, 1995 7.3L

Air in the fuel rail purges out by itself since its a regulated return system. Air in the HPO rail takes about 50 miles of driving on the highway doing about 65 or so to clear out.

It may take 4-5 long cranks of 10 seconds each before you can start the engine. Just wait about 5 minutes between cranks to cool down the starter. Also may have to recharge the battery since this is a lot of cranking.
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post #5 of 5 (permalink) Old 06-08-2017, 01:28 PM
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Re: Need help bleeding air from fuel rail after ejector change, 1995 7.3L

I just did this AGAIN last night
This is about the 6-7th time I have done injectors/O rings in the last year

I hand filled the HPOP (Mine was empty because I changed IPR)
hand filled the oil rails in each head
let glow plugs run their full duration
then cranked the starter
It took 10 seconds of cranking before fuel was suctioned from tank through filter and into heads, then she fired right up. Ran rough for the first couple of seconds then smoothed right out.
I let it idle for 10 minutes or so looking for leaks/problems
Watch the fuel/oil mixture drip from the exhaust pipes for a few minutes, this is the left over fuel that was in the cylinders/exhaust after the injector change, it will burn off
Next step is to test drive, put it under load and this will purge the air
All grey/blue/white smoke should clear up within first 50 miles or so and then you are good to go! Continue to monitor for leaks.....

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2000 E350 7.3, auto 2wd, 3.73, planning a TTB 4x4 conversion
21.9 liter family
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