It bucked!
Thread Starter
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Posting Guru
Joined: Dec 2009
Posts: 2,265
Likes: 2
From: Garden City, KS
Hmmm, I'm DEFINITELY gonna try that... if the pump comes out postitive, then I'll do the CPS. $25 isn't TOO bad. Thanks for the help... what's the normal fuel pressure anyways (in PSI)?
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
When checking pressure, you have to check it under load. That means get out on the freeway and punch it. Pressure at idle in park is rarely a problem.
45 psi is the minimum you want to see. 60 - 70 is considered ideal by many here.
45 psi is the minimum you want to see. 60 - 70 is considered ideal by many here.
Thread Starter
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Posting Guru
Joined: Dec 2009
Posts: 2,265
Likes: 2
From: Garden City, KS
Ok, I'll fool with that. Would an injector or the HPOP cause this? I'm just trying to understand what's up with the crappy mileage I'm getting? I did REALLY good last summer. Now, I can't get outta the 12's and 13's! I would imagine it's all related. Oh, my fuel filter is overdue. 5000 to 10,000 miles. I didn't get to it last service (I didn't think... I'm still transitioning from THEM having it and ME having it). Would that cause the problem?
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
Fuel filter could be an issue depending on how dirty it is. HPOP or injectors won't have anything to do with this.
If you've also got MPG concerns, check for boost leaks or leaks at the up pipes. That won't help the bucking issue, but might help with mileage. A very select few have noticed an increase in mileage after doing this Welcome to guzzle's Exhaust Backpressure Sensor Cleaning Maintenance Web Page
The rest of us just notice how plugged up it was and nothing else after we clean it.
If you've also got MPG concerns, check for boost leaks or leaks at the up pipes. That won't help the bucking issue, but might help with mileage. A very select few have noticed an increase in mileage after doing this Welcome to guzzle's Exhaust Backpressure Sensor Cleaning Maintenance Web Page
The rest of us just notice how plugged up it was and nothing else after we clean it.
Posting Guru
Joined: Mar 2005
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My vote is to start with the CPS to rule it out as a culprit!
The fuel pump won't cause the sudden choke or cough. If it's the engine cutting out, I still think the CPS is the place to start and only costs around $25.
You can plumb in a fuel pressure gauge on the back side of the fuel bowl and watch your fuel pressure yourself cheaper than a dealer will test it for you. Another simple test would be to pull the fuel line off the back side of the fuel pump, plug the line coming from the tank, and get you a small piece of hose. Stick the short hose on the back of the fuel pump and stick the other end in a fresh 5 gallon container of diesel. If the chirping goes away, it's time to drop your tank.
You can plumb in a fuel pressure gauge on the back side of the fuel bowl and watch your fuel pressure yourself cheaper than a dealer will test it for you. Another simple test would be to pull the fuel line off the back side of the fuel pump, plug the line coming from the tank, and get you a small piece of hose. Stick the short hose on the back of the fuel pump and stick the other end in a fresh 5 gallon container of diesel. If the chirping goes away, it's time to drop your tank.
Thread Starter
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Posting Guru
Joined: Dec 2009
Posts: 2,265
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From: Garden City, KS
Ok, I'll start with that... do I need to get that from the dealer, or can I get it at any parts store?
Posting Guru
Joined: Mar 2005
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Well I would say its up to you. I had the part number and bought mine on line. Ebay as a matter of fact. Original part number in the original ford shipping plastic. Can't recall the cost but it was minimal...
Thread Starter
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Posting Guru
Joined: Dec 2009
Posts: 2,265
Likes: 2
From: Garden City, KS
I just checked Advanced and they carry it... and according to the site, it's in stock at my local store. I have to get my heater core bypass valve from them tomorrow so I'll grab my CPS then.
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Thread Starter
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Posting Guru
Joined: Dec 2009
Posts: 2,265
Likes: 2
From: Garden City, KS
Well, I bought it... but then I took it back. I've got a few things I wanna try first. I know my fuel filter is WAY overdue, but I was hoping to push it to my next service (1000 more miles). Also, I had the "Water in Fuel" light go off on Sunday... so, I think I need to check some other stuff before I drop the money. I've also got a strange oil leak... it wasn't there last week so I'm a little worried. Then all this starts happening... I wonder what I did? I think I should've left the Superchips off the truck! 
