Hello everyone, i am new here and have a problem that i hope you all can help with. i have a 01 excursion 7.3 that has a edge downloaded programmer (75hp tune installed) and a juice with attitude usually set on 3. it has a 4" bd diesel exhaust and a air hog filter. 155k on it. regularly maintained by yours truely. it has developed a rather annoying problem recently. it will start and idle rough intermittantly, when it idles rough it puffs a little white smoke at times. very little. if i drive away, it will die within 1/8 mile. acts like it runs out of fuel. bucks and jerks and eventually dies. will restart if i hold the throttle to the floor but starts really hard and cranks for quite a while and will begin to fire seemingly one cylinder at a time. still runs rough will run for a few seconds and die again. this goes on 2-3 times till the batteries get weak or it clears its self up and is fine for the rest of the day. sets a few codes: p1211 all the time, p0604 sometimes, and a icp voltage below desired level code. WTF!!! i buy fuel at the same place all the time, change the water sep. and fuel filter every 12k. im begining to suspect injection pump? possibly idm? any input would be helpful. thanks everyone!

 

No injection pump on a PSD my friend!
Have you changed the CPS lately? CPS = crank position sensor, if its bad the rig won't run. Its mounted to the front of the engine near the harmonic damper, on the left hand side. Thats where I would start. Then come down to the 99-03 7.3L PSD forum for more help.

 

The P1211 code is normal to see with a chip or programmer, however it can also be a sign of a problem when there is a second ICP code. Since you are showing a second ICP code, you've got a problem with your high pressure oil.

Most likely, you either have a bad ICP sensor, or a bad IPR. First test, when the truck is hard to start or not running correctly, shut down the engine, open the hood, and unplug the electrical connector on the top of the ICP sensor. The sensor is located on the driver's side oil rail, just behind the alternator. Once the electrical plug has been disconnected (and you've checked the electrical harness for any chaffed wiring), start the truck. If it runs better, then you have a bad ICP sensor. If not, time to move on to replacing the IPR.

When the ICP sensor is unplugged, the PCM will substitute a "best guess" for maintaining high oil pressure to the injectors. If the best guess strategy is working better than the sensor, then the sensor itself is bad. Most likely, I'm also willing to bet you have oil leaking out the top of that sensor. You'll see it when you unplug the electrical connector.

 

I'm so glad that someone with some actual PSD smarts found this thread

 

Hello thanks pocket and 4x4. I checked the icp connector and sure enough it was full of oil. I replaced the icp and changed the oil which was 3 qts low! (my buddy at the ford dealer says the low oil would cause this by airating the oil to the high pressure pump. Been 2 days and running good so far. I have 75 hp injectors for it that I think I want to put in but I'm afraid. Will my pump be ok with these? Or do I need to piggyback it or replace it? What else should I do with these mods? I want to do something to the turbo or replace it. What's your reccomendation? I'm not looking for huge power just to have a little something for the neighborhood cummins! Reliability is a big thing for me. My injectors are from Pensacola diesel. Thanks everyone!

 

Good info here

 

To be honest, I would never run Pensacola injectors in my truck. They have a terrible track record of bad builds on their modified injectors. It's to the point that several well known shops will refuse to accept them as cores. Pensacola does not provide specs of their injector builds, and they don't flow match them either. Injector specs are required if you want to have tunes written to properly run them, and any reputable shop will include build specs and flow sheets when you get the injectors.

If you can, return those injectors and get a set from Swamps, Rosewood, or Unlimited Diesel. Those guys know how to build injectors.

As for supporting mods... most higher HP injectors (such as Stage I's, Stage II's, Hybrids, etc) are sold as single shot injectors. Stock injectors on your Ex are split shots. Singles require custom tuning in order to run properly, so you'll have to ditch your Edge stuff and get a chip (even higher HP split shots require custom tuning too). The advantage to single shots is that they actually use less oil than splits, so in most cases you don't have to do anything with the high pressure oil pump as it should provide enough oil to run singles easily. A turbo upgrade would be highly recommended, since the stock turbo is pushed pretty hard even with stock injectors. With mild injectors, a 38R or an H2E turbo would be a great match.

Lastly, you'll need to address the transmission sooner or later with larger injectors, as the trans is the weak point.

Hope this helps.