Changed Fuel Filters - Won't Start - AIR?

[scotiadallas]

Hi All,

I changed out the fuel filters as recommended. Lower first, then the top one.

Truck started for 10 seconds then when dead and got the wrench symbol.

I believe that there is air in the system and I've done this so far:

1. Opened the water separator lever under the frame rail, fuel is flowing fine.

2. Cycled the priming cycle "key on for 30 secs" and key off.

3. I try and start the truck every time I do 6 cycles of the above priming cycle.

4. Every 3 or 4th try (complete priming cycles) to start it, the truck catches, runs for about 10 seconds, and then dies. Usually I get the wrench symbol and the truck throws aP2291 code which, I believe is a ICP pressure too low error.

5. I know about the Schrader valve on the fuel cooler and I've bleed this every time the truck fires and goes dead. There is always a bunch of hissing and popping of air then I get a good flow of fuel. When I say "good flow" I mean that it comes out in a steady stream that squirts about 1/2 inch from the outlet valve. Some people told me it would be under a lot of pressure but that's not the case. I bleed this when I have the key in the on position and the pump is priming.

6. Once I get the fuel flowing, I cycle it 6 times and try to start the truck all over again. I do clear the codes before I start again.

7. I've tried pressing the fuel stop override switch (this was mentioned in another forum) as I crank it but nothing happens there either.

After all the cycling, and trying to start it this afternoon, my batteries are faded. I've hooked up the charger and I'm letting both batteries charge overnight. I want to try again in the morning.

Many people have suggested that this is just an airlock and it's going to work itself out if I have patience and keep cycling, bleeding, etc. I keep finding air in the cooler valve (Schrader) so I believe them but I wanted any other opinions possible.

Possible that I have an air leak on or around the first filter (under truck)? I cleaned the cap and the threads of the housing and lubed the o-ring. It went together well and it's tight.

How many times do I need to do this to bleed the air?

Anyone have any ideas? I'm freaking out as I need my truck on Monday.

Thanks for any advice/opinions.

D

[jacobwill1988]

I want to know about oil change in my car, I bought it a month ago and want to keep it in good condition. I heard from my friends who worked in Auto Mechanic Company that oil change is very necessary to keep engine warm and good. When should I change the oil in my car.

[Capt dong]

this happened to me when the fuel filter cap wasn't tight enough for me under hood.

[ryandamo]

did one of the o rings not seat right/not get put on?

[rollincoal6.4L]

take fuel filter on top of engine out, have someone watch while you cycle the key on without the filter in, stop when fuel bowl get 3/4 full of fuel, put cap back on and fire it up, make sure cap is fully seated

[nussford]

There is to canisters on top of the engine, is the filter the most centered one like the 7.3s or are they both filters

[justlearning]

Originally Posted by nussford

There is to canisters on top of the engine, is the filter the most centered one like the 7.3s or are they both filters

Standing at the front of the vehicle facing the radiators, as you mention, yes there are two filters. The one on the left or passenger side of the motor is the oil filter. The one on the right or drivers side of the motor is the secondary fuel filter. The primary fuel filter is the one tucked in along the vehicle frame rail, serviced underneath the vehicle.