I have a 2003 E350 7.3 190xxx miles

Injectors have 60k on them.

Anyways, was running perfect then I got a code while towing maybe 7k with the dp-tuner daily 80 on my infinity.

The code was P1211 van lacked major power and was idling very rough. Shut it off-ran code again and cleared. Very long crank and when it fired was idling the same.

Icp was reading 450-550
I didn't have the IPR reading.

Unplugged IPC and it ran worse and stalled. Plugged back in ran bad still. Pulled a icp off of a different van plugged it in-same issue.

Did reading and convinced myself it was the IPR. So I put a new IPR in my van. Sucked.

Started it up with new IPR. Same things. Now I'm monitoring the IPRDC and it's showing 49 while at idle which is still really bad.

IPC is still reading 450-550 when running.

Went and paid 169 for a new icp-installed van still was running the same with the icp plugged in or not.

The code that pops up is the icp low signal code.

Getting an internal memory code

I tried setting the van back to stock-runs the same. Then to 60hp tow-runs the same. Then to 80hp daily-runs the same. Back to stock--same thing.

I'm stumped. Any help would be awesome.

 

P0603 is the memory code I was getting.

 

Flash the PCM back to stock tune and then with the key off remove the Infinity from the OBDII port and see if that makes a difference. Justin was on here earlier.... If you scroll through the screens you should see a parameter labeld IPRDC% IIRC...

Check your 42 pin connector to see if it is tight and also see if there is chaffing on the wires over the DS VC.

Also check the harness on the ICP sensor and the IPR to make sure that you don't have exposed wires that are shorting.

P0603 is SOP with the Infinity. No worries.

 

Thanks.

I found the IPRDC% and that's reading 49. +/- when idle. Super confused.

42 pin connector?

DS? VC?

Will do. Gonna check. Thanks.

 

Yes 49% at idle with an ICP of 500-ish is very high which may point to a short to ground.

The 42 pin connector is on the drivers side valve cover and due to vibration the insulation on the wires does wear.

 

You likely have either a weak HPOP or a major hydraulic leak such as blown injector o-ring(s).

 

Is there a way to test the hpop?

 

Trying to return it to stock and I'm getting-error to read input file it will let me switch for 60 to 80 though

 

Pull The Chip......Putting it on stock setting does not mean it's truly stock. Eliminate all your possibilities .....

 

Don't think there is a chip.

When I bought the infinity it just plugged in. Been a few years

 

Do you know what your EGT's were when you were towing? Not A good idea to tow on the 80 DP tune. Do you know your fuel pressure?

 

Egt's were below 900 for sure. Was going slow, taking it easy. I tow a lot with it and have only once been above 1200. Usually I switch to 60 towing but wasn't going far and it was all side streets.

Fuel pressure-no. Can it be checked with the infinity or do I need to get a gauge set up?

 

There is no fuel pressure sensor on the truck, you would need a gauge set to read it.

If you disrupt the HPO system (like pulling an IPR), you introduced air into the system, and it take some driving to clear it. It would have been handier to know the ICP DC before you started wrenching on it.

I'm with Pikachu - you likely have a significant internal oil leak on the HPO side. I would do a Cody test - it's going to be obvious.

 

The OP is correct. The Infinity is not a chip and it does not attach directly to the PCM like a Hydra. If you pull the plug, OBDII, without flashing the PCM back to stock, the last commanded program is what remains on the PCM which in his case seems to be the 80hp DD. So, a program back to stock is required with this specific piece of hardware prior to removal of the plug. For all intents and purposes, once it is flashed back to stock, the Infinity just turns into a very expensive LCD screen from which to monitor PID's.

I agree with Bonanza35, I would not tow in the DP 80hp tune.

To the OP, it sounds like your base flash is corrupt. Might want to see if Jody or Justin can email you a replacement to upload to the Infinity and then flash it to the PCM and see what happens before spending any more time and money.

The test for the HPOP involves having the truck in "Stock" tune, to limit FIPW as a long FIPW will kill ICP psi, with a healthy IPR and ICP sensor. Then take the truck for a loaded, preferably uphill, WOT run and see what the max ICP psi is that the HPOP can "maintain" over a good distance. 2600-2800+ and you are good to go with the HPOP and probably o-rings too. If not, then conduct the "Cody" test, failure=injector o-rings, to narrow it down to either o-rings or the HPOP.

What did your fuel filter look like the last time you changed it? Black or golden external pleats?

 

Fuel filter was golden. I removed all the fuel from the bowl and it was clean.

I will get ahold of DP to see if they can get me a new stock tune.

What are the chances of a bad ICP out of the box?

Thanks for all the suggestions.