99 Expo Help Please

[firecapt321]

Hey fellas, I heard this was the place for some expo help. I have a 99 Expedition xlt, with a 4.6. 300+k miles. Was driving the other day and it shut off like I had just turned off the key at 60mph. Had it towed back to the house. It's been a couple days and just now got a chance to look at it today, came out and it cranked right up: /. I am getting code p1450. Something to do with fuel evap system. Could this have caused my sudden shut off at highway speed? Thanks for any and all help. Jp Also getting p0401 and p0308.

 

[stamp11127]

P1450 Ford - Unable to Bleed Up Bleed Fuel Tank Vacuum

P0401 Ford - Exhaust Gas Recirculation Flow Insufficient Detected

P0308 Ford - Cylinder 8 Misfire Detected

P1450 Ford Unable to Bleed Up Bleed Fuel Tank Vacuum OBDII Engine Light Trouble Code | Engine-Codes.com

I would say the first two could shut you down. How handy are you?

 

[firecapt321]

Handy enough to get myself in trouble. Lol .......I should be able to handle it if I can just get a more defined idea where I am headed.

 

[stamp11127]

The p1450 code is basically the fuel system is creating a vacuum in the fuel tank. Could be a faulty vent solenoid or harness problem.

The p0401 may be caused by blocked egr passages, rotted vac lines to the pressure sensor or egr valve.

The p0308 could be a plug, wire or coil problem or any combination.

The fuel tank isn't that bad to drop as long as it is empty. The other two are basically maintenance issues for the amount of mileage. How many miles are on the fuel pump (it isn't a current problem but if it is old and your dropping the tank......)

 

[firecapt321]

Damn, just filled the tank up and no, never replaced fuel the fuel pump before. Where is the canister and vent solenoid etc located?

 

[stamp11127]

I think it is in the back, big round canister by the frame rail.

 

[firecapt321]

Ok so I need to clean the egr ports and possibly replace the egr. And check the hoses. Will take care of the #8 issues. Now what about the tank vacuum issue? I have read an elbow fitting can be clogged. Can I clean that canister out? Any way to test the vent selenoid? Is it located on top of the canister or fuel tank itself?

 

[firecapt321]

Have some time today to try and chase down this evap issue p1450 code. Is it normal on this vehicle when idling, to remove the gas cap and get a serious vacuum release (whoosh) then the engine tries to die.

 

[IMINYOURCHAIR]

no. Mine rarely does this before I fill up but when it does, it does not stumble

 

[firecapt321]

Any chance this points to any certain faulty device? Or is it still possibly any number of issues in the fuel vacuum system?