Just got a 2000 excursion with the 7.3 in it ran great. Now it's running like it has ½ the power. But sometimes you'll be driving and not hit the accelerator anymore and it'll give you all the power back for a couple minutes and than take it all away again. Yes it leaks oil like any other 7.3 but there's oil in it and it gets topped up when needed. I've changed the air filter fuel filter and ICP (had oil in the connector). It does have an edge tuner in it don't know if that could cause the issues. I could go up any incline and it falls and downshifts, big hills I could start at 120km and I drop down to 60km to make it up. And now I am getting half the fuel milage where a full tank used to last 2 weeks now lasts 1.

I don't want to be throwing in sensor after sensor as that gets costly, so I'd like help on how to test different sensors and figure this problem out.

THE CODES:
Injector control pressure high
Electronic feedback signal not detected
exhaust pressure sensor A circuit low input
Integrated control panel circuit out of range low
turbo boost pressure low
turbo boost pressure not detected (pending)

there's soo many things it can be and I don't want to be throwing money to the wind to figure it out ,so any insight would be appreciated.

 

Start testing. Test fuel pressure. Pressure test the turbo tube seals. Remove exhaust back pressure sensor and check to see if the tube is clear. For checking the turbo section make a pressure tester with a PVC cap, plenty of youtube videos.

 

Do all those codes come back after clearing them? What readings do you get from MAP sensor while driving? X2 on fuel pressure testing.

 

Check for boost leaks specially the MAP sensor hose and wastegate lines (red and green) lines coming out of the spider. Then check fuel pressure.

 

I am no expert by any means. 2 of those codes I have never heard of and make me believe your using a generic scan tool. You need a scan tool with psd specific programming. Codes like this " Electronic feedback signal not detected " and " integrated control panel circuit out of range low" seem like universal generic codes that do not apply. Get a good scan tool, erase the codes and go for ac30 mile drive. Pull the codes.

 

get ForScan and one of their Recommended adapters.

https://forscan.org/home.html

 

First thing I'd do is check for boost leaks..

Boost leak tester theead

 

What's the temperature there? Wondering if your warm-up valve is staying shut from a bad oil leak on the pedestal control arm

Would explain your loss of power, oil leak, and bad mileage

 

Did this start happening before or after you changed the ICP? Off brand or sneaky fake motorcraft parts can cause issues.

My guesses based off your symptoms:

• Issue with high pressure oil (ICP, IPR, etc)
• Exhaust back pressure related (sensor, valve)
• Fuel pressure
• Other sensor related (MAP, EOT)

Keep in mind, sensor related includes the sensor itself, wiring, or how it’s fed information (EBPS tube plugged).

Come back and feed us more information and we’ll try to help you work through it. A good scan tool (FORScan) to read live data plus record and graph will be your friend.

 

Does it hiss out the exhaust at you when it's got low power? I'm on board with a ebpv issue. But a forscan session is in order.

 

My truck occasionally throws some of those codes and I for fact know I have exhaust leaks at the up pipes and the center section of the turbo. Runs good but crappy mileage and EGT's slightly higher than they should be. I would be looking for signs of exhaust leaks. And no, not all 7.3's leak, mine has no oil leaks but exhaust, it leaks like it was shot with a 12 ga.

 

7.3's don't leak. They may occasionally mark their territory to let the lesser trucks know what's theirs, but never leak.

 

It looks like your scan tool only provided the "explanation" for the codes without giving the actual code letter and numbers.

Your codes:
- P1210 Injector control pressure high
- P1670 Electronic feedback signal not detected
- P0472 Exhaust pressure sensor A circuit low input
- not sure on the "integrated control panel circuit out of range low," there isn't a description in the shop manual that is definitely similar to that phrase.
- P1247 Turbo boost pressure low
- P1248 Turbo boost pressure not detected

P1247 and P1248 show that the the powertrain control module isn't seeing boost on the manifold absolute pressure sensor when it expects to. It also isn't seeing exhaust back pressure either (P0472.) The PCM will cut fueling if it doesn't detect sufficient boost, that is to prevent the engine from making excessive smoke or melting pistons if there isn't enough air getting into the cylinders to properly burn the fuel. This can be caused by lack of fuel to the engine, exhaust leaks, a malfunctioning turbocharger, a malfunctioning turbocharger wastegate, an exhaust restriction (which includes the back pressure valve closing when it shouldn't), boost leaks after the turbocharger, a leaky hose between the MAP sensor and the turbocharger compressor manifold, or a defective MAP sensor.

I would get a copy of the PC&ED shop manual for a 2000 and follow the algorithm for the P1247 and P1248 DTCs if I were you.

 

Here's a thought. Since The PCM is throwing codes for low EBP and MAP what do y'all think the chances of a bad BARO causing it? That's supposed to be the PCM's baseline isn't it? Like I said just a thought. Just seems a little unlikely that the MAP and EBP would both go bad at the same time.

 

He needs to be able to look at PIDs to see what the values are in order to say much. He could have separate issues with the EBP sensor and MAP sensor. The EBP sensor could have a plugged tube as it's very common, and people also disconnect the sensor to keep the backpressure valve from operating as the EBPV system shuts off if the sensor input is lost. The EBP issue could have far predated the MAP issue, you would not generally notice an EBP sensor failure unless you are watching for codes or watching PIDs, but you would notice problems with a MAP sensor right away.