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Old 02-11-2014, 04:24 AM
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NO power at highway speeds 55+ mph

I have a 2003 F250 ccsb FX4 6.0 203,000 miles, i have had it just over a year and it has been a awesome truck... until now.

it starts up perfectly and runs smooth, accelerates fine and has good, or what i believe to be good, power at slower speeds. When i get it up to 50-55 mph it has no more power, as if it has hit a wall. I can keep the pedal at 1/2 throttle and ease it to about 65 but that's about it. if i hit an incline it will slow back down. any more throttle then 1/2 and there is no change in engine sound or rpms or shaking.

another symptom i have noticed it that the accelerator pedal only seems to work up to about 1/2 throttle. Can a gas pedal go bad? haven't been up under there is it an electronic pedal or something?

I am getting no codes on my SCT scanner. I had my FICM repaired by ed @ ficmrepair.com and got the Atlas 40 tune installed. I had low voltage at all cylinders and it was on the way out. I thought that would have corrected this issue. but sadly no.

Oil and fuel filters just changed last week, all motorcraft. I run Diesel Kleen through every tank.

truck has EGR delete, cat delete, SCT tuner, egt/boost/trans temp gauges. new FICM with Atlas 40, 4" lift on 35" tires

I don't have a fuel pressure gauge but i can get one, if anyone thinks i should start looking in that direction. All the other posts I have look through are nothing like what i am experiencing so i am reaching out.

I am very mechanically knowledgeable and diesels are new to me, not afraid to ask for help. thanks in advance.
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Old 02-12-2014, 07:46 PM
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Try this. Turn your headlights on, then disconnect both batteries for 20 minutes. Then hook them back up and go for a drive. See if it still does the same thing.
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Old 02-13-2014, 01:08 AM
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Couple of areas you can look. What is boost doing? You could check to see if vanes are stuck closed ( low end power position). I would assume it would give a code, but maybe not. You can unplug turbo and see if you hear it change. Also, you might have a bad exhaust pressure sensor. If it doesn't detect an increase in back pressure it won't change the turbo to the high speed mode. Those are some easy things to check.
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Old 02-13-2014, 02:46 AM
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Quote:
Originally Posted by divotf15 View Post
Couple of areas you can look. What is boost doing? You could check to see if vanes are stuck closed ( low end power position). I would assume it would give a code, but maybe not. You can unplug turbo and see if you hear it change. Also, you might have a bad exhaust pressure sensor. If it doesn't detect an increase in back pressure it won't change the turbo to the high speed mode. Those are some easy things to check.
03's do not use EBP in their strategy, they use MAF.

To the OP Ever had a HPOP? Sounds like the symptoms and based on your mileage, sounds like what happened to me, If the problem continues to worsen I would almost bet on it.
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Old 02-13-2014, 03:15 AM
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Sorry, didn't notice 03. Obviously check maf and hoses then
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Old 02-13-2014, 12:06 PM
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I returned the program to the stock program. now it runs like a turd. has a long start but once it fires off it starts right up. new top speed is only around 45. tells me that my tuner must be doing something.

I checked the throttle position pedal sensors all working as they should.

turbo spools up as usual. I can hear it and my gauge tells me it making boost. I got it up to 15-16 psi.

What is this "limp Mode" I hear people talk about? could it possible be doing that. how do you reset it?

ill try disconnecting the batteries and see what happens.
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Old 02-13-2014, 01:35 PM
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further testing

disconnected batteries, headlights on 30 minutes later on test drive.
no new results.

No CEL on dash but i ran my scanner anyways and got a few codes back
P0403-EGR Control Circuit
P0405- EGR sensor A circuit low
P0603- Internal Control Module Keep Alive Memory KAM error
P1000- OBD System readiness not complete

EGR has been removed with egr delete kit.

none of the other codes i see relevant to my problem but i wanted to report them just in case.

I did not have the longer turn over on start up this time. fired up in just a second.

now that i know that my CEL light on the dash is not illuminating when it should leads me to believe that the wrench light should also be on as well.

I guess ill have to take it to the dealership and see if i can ask some questions and maybe get some free advice.

Am I hurting anything by driving it in this condition?
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Old 02-14-2014, 06:50 PM
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Drove to work and back today on stock program. Same symptoms very sluggish. Stopped a few places on the way home. Last place I stopped truck had a very long start. Then started in a weird way as If it ramped up. Drove it home. Checked for codes and there it was. P2290!

Will do some further testing of actual icp to ipr to verify bad pump.

Any tips on where/What to look for hpop. Dealer? Reman? Vendors. What else needs ro be replaced with the pump. Icp and icr valve? Gaskets?

Does the intake manifold have to come out?

Hopefully the second time into the belly of the best won't be as bad.

Sent from AutoGuide.com Free App
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Old 02-14-2014, 06:58 PM
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I had the same exact thing that's why I suspect your HPOP,

Here's what you can do: Pull degas bottle, Intake, FICM, on the driver side, Your ICP sensor is located underneath the turbo along with your IPR valve. If you remove the connector from your ICP sensor and it is oil soaked then the sensor is failed: You will need to replace the sensor and the connector, It is also a good time to pull your IPR sensor and see if there is any trash the screen at the end of the sensor.

I did all that to my truck because my connector was oil soaked but ended up doing the HPOP because that was my toot cause to my problem.


As far as removing the HPOP you will need to pull the Intake, Turbo, Oil/Fuel filter housing, you do not have to remove the intake, the bolts underneath the intake on the passenger side can simply be loosened and left in the cover, you can rotate the cover out from underneath the intake, same goes for reinstallation.
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Old 02-14-2014, 07:01 PM
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Normally a bad ICP can be identified by dips or spikes in the signal, which also makes the RPM erratic, like the truck is surging. Your symptoms sound like a weak and failing pump especially that the condition is slowly continuing to become more noticeable.
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