7.3 Rough idle and no power

[FishinDiesel]

New to the forum, lots of great info. Here's my dire situation...I've got a 00' 7.3 that has run great until two days ago when the truck started to sputter at 1/4 tank so I fueled up to 1/2 tank and truck continued to sputter and get worse through the day. After 15 miles the truck would hardly take off from a dead stop and took miles to get up to 45 miles per hour and idles at 600 rpm's really roughly. I changed the fuel filter and dropped the tank to find a broken pickup. Replaced the pickup and truck continued to be the same. In neutral it won't rev over 2400 and now I can't get it to go up to 35 mph in a few miles and I've tried to run it for about ten miles and two hours of idling with no change. The truck seems like it has a serious air problem. I even ran the truck from a bucket of fuel with the pickup out of the tank and it made no difference. I can't find what is making the truck run so poorly and it isn't throwing any codes. Any help would be great.

[nunly81]

hmmmm, thats a good one. No codes at all seems wierd, but if theres no restriction in the intake or the fuel the exhaust could be restricted.

[DougDavenport]

I had almost the same exact symtoms and am REALLY IN THE DARK!!!!!!!!!! problem still not solved...my codes are P1316,P0472,P0603,P0273,P1295 AND I HAVE NO IDEA WHERE TO START!!!! replaced fuel water separater filer and still does it...HELP!!!!!!!!!!!!!!!!!!!!!! its my 2001 7.3

[nunly81]

heres what those codes mean and some things to check on them
p1316- idm codes detected, pretty much replace the idm for this one
p0472- ebp sensor(exhaust back pressure) either short to the sensor or the sensor is bad
p0603- internal KAM control module error, faulty PCM or an open pin in it
P0273- Injector circuit #5 injector, replace the wiring harness and valve cover gasket for the passenger side injectors.
p1295- multiple faults for bank 1, this goes with the above so something is shorted out.

These are straight out of the PC/ED books we have at the dealership. I hope this helps.

[SCUFFY828]

p1316 doesnt mean replace the idm, it means you have a short harness melted or loose under the valve cover, looks to me like cylinder 5 wiring has an open circuit , 1294 means that that side is picking up a wiring issue , bottom line is , pull the passenger valve cover off and fix your problem

p0603 tells me you have changed chip programs , or took chip out , dont sweat the ebp code

[FionaThe02PSD]

^^^^ Check the UVCH's... Ford and or IH makes a clip to put on them that helps avoid this issue in the future.

[GoldieStroker944]

it really sounds like the idm to me my 01 did something similar to that and i replaced that and all was fixed

[dieseltechinco]

check the wire harness under the valve covers / common problem with 7.3L / try doin a injector buzz test