I just changed my fuel filter and now the system won't prime. I've done this before and only needed at pump a couple times before it would build resistance, but I've been pumping for 30 min without the air bleeding out. I've filled the filter bowl and tried to prime with the bleeder both open and closed. I'm in Colorado, can anyone help me out?

Thanks

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05 Silver CRD in winter, silver BMW F800ST in summer

Are you sure the little rubber o-ring from the old filter came off the filter head when you removed the old filter? If not then the double o-ring will create space for air to get in and keep it from priming possibly.

Jim

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Stock 06 CRD Limited
Timing belt replaced at 110,000 miles

Yep got both o rings off.

Thanks

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05 Silver CRD in winter, silver BMW F800ST in summer

Thoughts and/or comments:
1) do you have the 1s gen OEM filter head (drivers side fuel heater plug smaller than the other plug) or the 2n gen OEM filer head (both plugs about same size and heater plug likely bright blue). If you have the former check for a massive air leak by unplugging the heater plug.
2) is the WIF sensor at the bottom of the filter on tight?
3) I gather both old filter "O" rings are off and both new "O" rings are on, correct, and that you ran the filter down until the gaskets/"O" rings bottomed and then did about 1/2 to 3/4 more of a turn, correct?
4) the filter bleeds just like brakes - pump until you get pressure; hold pump down and open bleeder (I like to run a clear vinyl tube to a catch bottle so I can see what's happening and keep the mess down) to release air/diesel; tighten bleeder and release pump; repeat until air is gone. If you leave the bleeder open during the operation I strongly doubt you will ever do anything but pump air in and out of the filter head.
5) if you removed the assembly from the vehicle to swap the filter (easiest way to do it) did you reverse the fuel lines on reinstall?
6) I suppose it's possible the fuel filter pickup screen in the tank is clogged but you would have to drop the tank to check that. Just a thought, if you lack an inline pump - remove fuel tank cap, use a tennis ball to plug the opening, open bleeder valve or remove feed line from filter head, LIGHTLY pressurize the fuel tank by inserting an air supply line thru the tennis ball which should force fuel out of the tank and on to the filter head unless the line is plugged somewhere between the tank and the filter head.

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Sold to LOST member my 05 Ltd, GDE Stg II turbo + TCM tune, SunCoast TC w. Transgo kit, Steiger window regulators, Samcos, Fumoto valve, 2nd gen filter head with Lub. Spec. bleeder, Hayden clutch & 11 blade fan, inverted spare, P-1 battery, BF Goodrich Long Trail TAs, Etecno1 glow plugs, timing belt at 50K miles/8 yrs

This is a 1st gen filter head. I took off the connectors and there is no leak there and the filter is on tight, including the water sensor. It seems the plunger is not creating enough suction to draw fuel from the tank. I'm going to fill the filter head from the bleeder port and fill the supply line from the filter and see what happens.

Thanks

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05 Silver CRD in winter, silver BMW F800ST in summer

For what it's worth I had air in the fuel problems on a 1s gen head (would prime though) and the only way I could tell that I had any leakage at the heater plug was to stick a "Q" tip in there, pull it out and do a sniff test - sure enough it smelled of diesel. Also for what it's worth there has been at least one report of the primer pump loosing it's shaft seal or some such and not being able to pressurize the system.

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Sold to LOST member my 05 Ltd, GDE Stg II turbo + TCM tune, SunCoast TC w. Transgo kit, Steiger window regulators, Samcos, Fumoto valve, 2nd gen filter head with Lub. Spec. bleeder, Hayden clutch & 11 blade fan, inverted spare, P-1 battery, BF Goodrich Long Trail TAs, Etecno1 glow plugs, timing belt at 50K miles/8 yrs

Well I had success with filling up the bleeder port, the jeep now runs. The plunger still doesn't build resistance, so something must be broken. Thanks for the replies and troubleshooting ideas. Guess I'll eventually have to get the 2nd generation filter head.

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05 Silver CRD in winter, silver BMW F800ST in summer

I'm in Colorado Springs. I have a racor unit if you are curious what it looks like It is a perfect fit and can last up to 25k miles between filter changes. I wouldn't trust anything from Jeep anymore.

Maybe time for a lift pump. I never have to mess with the plunger

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Atlantic Blue 06 CRD Limited (his)
Joined by a 2000 XJ Classic (hers)

Must be a Colorado thing... I am out on the Western Slope and just changed my filter a week or two ago and had the same exact problem, the plunger no longer builds any pressure, Lift pump comes Monday!

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2008 Wrangler Unlimited Rubicon
2.5 Teraflex Lift
35" MT/R's

Lifted CRD - SOLD