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99 & up 7.3L Power Stroke Engine and Drivetrain Discussion of the 99 & up 7.3L Power Stroke diesel engine and drivetrain in the 1999-Up Super Duty trucks and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.

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Old 11-20-2012, 06:41 AM   #16 (permalink)
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Ok. I can clean the metal lines. That's good. I would rather not spend money if I don't have to. What do you mean when you say simple purple?
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Old 11-20-2012, 06:55 AM   #17 (permalink)
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Simple Purple is a cleaner that works good for de-gunking the engine
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99.5 PS CC 4x4 SRW ZF-6
Triple Pillar Gauges; Fuel pres, Pyro, Boost
AE, Alldatadiy, and half a clue
- AKA "The Big White Truck"
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The first part to be thrown at these trucks should be a PSD compatible scanner

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Old 11-20-2012, 07:04 AM   #18 (permalink)
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Are you talking about "simple green" or "power purple"? I personally use "Chem-eeze" i think thats how its spelled. How do you remove the check valve inside the fuel bowl?
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Old 11-20-2012, 07:11 AM   #19 (permalink)
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Yes, same stuff as Purple Power. I cover the alt and use a low pressure setting on the power washer.
You remove the checkvalve from inside the filter assembly. Again, I wouldn't just pull it to pull it, but just remember it's there should you ever have an issue.
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99.5 PS CC 4x4 SRW ZF-6
Triple Pillar Gauges; Fuel pres, Pyro, Boost
AE, Alldatadiy, and half a clue
- AKA "The Big White Truck"
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The first part to be thrown at these trucks should be a PSD compatible scanner

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Old 11-20-2012, 07:13 AM   #20 (permalink)
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RT or KLhansen has a link to Guzzle's page that get's into rebuilding the filter assembly.
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99.5 PS CC 4x4 SRW ZF-6
Triple Pillar Gauges; Fuel pres, Pyro, Boost
AE, Alldatadiy, and half a clue
- AKA "The Big White Truck"
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The first part to be thrown at these trucks should be a PSD compatible scanner

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Old 11-20-2012, 07:19 AM   #21 (permalink)
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Ok. I guess ill do what you suggested and remove and clean the check valve in the filter assembly and clean the metal fuel lines going to the heads. at least its a place to start since I am clueless to why the truck runs fine but just isnt running like its on 120hp tune.
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Old 11-20-2012, 07:24 AM   #22 (permalink)
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If you move the pressure sender to the other port first and it keeps the 70psi, it isn't fuel.
I would look at the turbo and look at the EBP sensor and tube as well. Make sure it doesn't have a hole in the tube or is plugged up.
The turbo has 2 sides to look at. If you have an exhaust leak, it will affect it just as much as an intake leak. The exhaust donuts are good for leaking and a pain to get to.
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99.5 PS CC 4x4 SRW ZF-6
Triple Pillar Gauges; Fuel pres, Pyro, Boost
AE, Alldatadiy, and half a clue
- AKA "The Big White Truck"
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The first part to be thrown at these trucks should be a PSD compatible scanner

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Old 11-20-2012, 07:32 AM   #23 (permalink)
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I hate to sound like I dont know what im talking about. But "Exhaust Donuts". As far as i remember my exhaust has the V-Band clamp at the turbo holding on the down tube and then a U-Clamp to bolt it to the short section before it dumps out before the passenger rear tire.
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Old 11-20-2012, 07:34 AM   #24 (permalink)
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I know what your saying. DUHHHH. The pipes that come from the manifold to the turbo. Time for some coffee before I say more stupid stuff.
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Old 11-20-2012, 08:17 AM   #25 (permalink)
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Same Truck!

I have a 2002/7.3 F350 - about 6 weeks ago had the exact same symptoms.

Ford dealer found the EBP Sensor was disconnected (wire fell off) and was not working - simple fix - put it back on and it worked fine.


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Old 11-20-2012, 08:32 AM   #26 (permalink)
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I will look into that tonight. I hope its a simple fix. Like it just has a bad connection or the tube itself is clogged. I will post resuilts if i find anything.
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Old 11-20-2012, 05:36 PM   #27 (permalink)
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Quote:
Originally Posted by 73Diesel View Post
I will look into that tonight. I hope its a simple fix. Like it just has a bad connection or the tube itself is clogged. I will post resuilts if i find anything.
Not only look for a clog, but ensure there isn't a hole in the tube. Try spraying some brake cleaner down the tube and look for it coming out.
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99.5 PS CC 4x4 SRW ZF-6
Triple Pillar Gauges; Fuel pres, Pyro, Boost
AE, Alldatadiy, and half a clue
- AKA "The Big White Truck"
______________________________________________
The first part to be thrown at these trucks should be a PSD compatible scanner

PM please. No Visitor Msg if you want a response anytime soon
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Old 11-20-2012, 06:07 PM   #28 (permalink)
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I didnt have time to work on the truck tonight. I will try tomorrow. I did run the truck on the stock setting and it will boost to 15-16 but it takes a bit to get there maybe 1/8 mile or better. It feels like the boost isnt building fast enough or there isnt fuel there to get the motor RPM's up.
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Old 11-27-2012, 09:40 AM   #29 (permalink)
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Here are the results of what i tested and changed. I moved the fuel pressure sensor to the output side of the fuel bowl and the pressure is the same as the input side. So that rules out a fuel issue. I cheaned the exhaust backpressure sensor and it had a little carbon buildup in the tube but wasnt clogged. I removed the intake from the turbo and there is very little movement in the turbo shaft and the compressor wheel feels fine with no evidence of it being dusted. Although now that i am paying attention to boost pressures i think the truck used to boost at a lower RPM than it does now, and the truck fuel mileage went down as well. I was getting around 18 in town and 22 on the highway. I have a spare turbo from a early 1999 truck that has the wicked wheel installed in it, the wheel is fresh but the turbo could use a rebulild. So im going to rebuild it and port it and see if it changes anything. Unless anyone has any other ideas on what to look at. BTW where is a good place to get a rebuild kit along with the gaskets to re-install on the truck.

Thanks, Steve.
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Old 11-27-2012, 07:23 PM   #30 (permalink)
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Before you go tearing out your turbo to replace with the early 99, keep in minf they are different turbos. The WW will change out to your turbo easy enough, but to change out the whole unit may be problematic. If I recall right, the outlet is smaller and it's also a different ratio overall. Let KLhansen or RT chime in and confirm this, or do a search.
On the EBP line, are you sure there isn't a hole in the line? Mine had one and it wasn't really visible, but using a can of brake cleaner showed it as a drip.
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Tom
99.5 PS CC 4x4 SRW ZF-6
Triple Pillar Gauges; Fuel pres, Pyro, Boost
AE, Alldatadiy, and half a clue
- AKA "The Big White Truck"
______________________________________________
The first part to be thrown at these trucks should be a PSD compatible scanner

PM please. No Visitor Msg if you want a response anytime soon
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