7.3 engine bogs down

[CHUCK]

mmmmmmmmmm

[haynmac]

I have a 2001 7.3 with the banks big wheel turbo, banks big head actuator with banks monster exhaust. 3 days ago i was driving up a small hill that i usually fly up in 5th gear and was forced to downshift to 3rd due to my truck losing all power, the engine revs up but there is absolutely no power. I changed the CPS and checked to see that the turbo is spinning. I ran a diagnostic test and found these codes, can anyone help me? PLEASE !

The Check Engine Light Never Comes On


CODES: P0475 Exhaust pressure control valve
P0476 Exhaust pressure control valve performance
P0541 Intake air heater circuit low
P1247 Turbo boost pressure low
P1248 Turbo boost pressure not detected
p1280 ICP circuit out of range

[haynmac]

I have a 2001 7.3 with the banks big wheel turbo, banks big head actuator with banks monster exhaust. 3 days ago i was driving up a small hill that i usually fly up in 5th gear and was forced to downshift to 3rd due to my truck losing all power, the engine revs up but there is absolutely no power. I changed the CPS , the fuel pump, and the fuel filter. I checked to see that the turbo is spinning. I ran a diagnostic test and found these codes, can anyone help me? PLEASE !

The Check Engine Light Never Comes On


CODES: P0475 Exhaust pressure control valve
P0476 Exhaust pressure control valve performance
P0541 Intake air heater circuit low
P1247 Turbo boost pressure low
P1248 Turbo boost pressure not detected
p1280 ICP circuit out of range

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Last edited by haynmac : 06-24-2008 at 01:56 PM. Reason: adding information

[Rowdydog]

I have a 1996 F350 w/ 7.3L and I am having a very similar problem. Going along in 3rd/4th and then bogs down to 15-20 MPH. If you deal with it for a couple of minutes it will catch and fire like normal then run great. The bogged down periods became more frequent and long. Now it has quit and will not restart? I was wondering what you found with yours as it sounded similar...?

[willholl79]

I haven't solved mine yet as it only does it maybe once a month now. It used to do it weekly, sometimes daily before my CPS went out. After I replaced that I had no problems for several months, now it is starting again.

Rowdydog: if your's won't run at all I would suggest a CPS(cam positioning sensor) replacement.

[twildman]

Originally Posted by Rowdydog

I have a 1996 F350 w/ 7.3L and I am having a very similar problem. Going along in 3rd/4th and then bogs down to 15-20 MPH. If you deal with it for a couple of minutes it will catch and fire like normal then run great. The bogged down periods became more frequent and long. Now it has quit and will not restart? I was wondering what you found with yours as it sounded similar...?

Rowdy, check your fuel pump as well. Also what brand of oil are you using, and have you checked the level?

Willie, if yours does it again, if you still have the Hypertech on it, return it to stock and drive it awhile to see if it still does it.

[willholl79]

Originally Posted by twildman

Rowdy, check your fuel pump as well. Also what brand of oil are you using, and have you checked the level?

Willie, if yours does it again, if you still have the Hypertech on it, return it to stock and drive it awhile to see if it still does it.

twildman(oh great one) The truck did this before the hypertech was installed as well. I bought the truck with 75,000 and it did this a couple days after I bought it. 3.5 years later with 170,000 it is still doing it, although not as frequent.

[Rowdydog]

TWILDMAN...
I picked up the CPS and will attempt installation of new on this afternoon - I just have to figure out the where/how to of it (looking online now to see how to)
Also, the oil was WAY, WAY (shamefully) down. She has been nursing a moderated rear main seal leak and I had forgotten to check it lately. Added nearly one gallon. Is the a oil pump priming something to look into?

[Rowdydog]

Twildman et all...
Just a little feedback on the problem.
I successfully changed the CPS out over the weekend.
I charged both batteries and she cranked right up.
While I was at it, I replaced the air filter with a K&N filter.
(Do you think with a K&N filter that the foam wrap-around screen in the filter box is still required? - I left it out but still have it if it is needed)

With the truck running I ran it around the section to the west of me and for the first time I heard the turbo whine when I stepped down on the skinny petal. The truck now has pick up like ever before. It is a F-350, crew cab long bed with 250K miles, and d*mn does it luanch now.

Since you guys were so helpfull with that problem, I was wondering if you could help out with one other little problem...can you lower the price of fuel so I don't have to call the banker to get approval before passing someone...

Thanks again !