Problems with my truck - details inside - open discussion - poll your opinion! - Ford Powerstroke Diesel Forum
View Poll Results: Oh dears... what could be wrong??
Fuel delivery system 2 7.69%
Injectors 6 23.08%
HPOP (hpop, icp, ipr) 10 38.46%
Electrical (wiring) 1 3.85%
Electrical (pcm) 1 3.85%
Electrical (tuner) 0 0%
Electrical (IDM) 1 3.85%
Mechanical (valve train) 3 11.54%
Mechanical (cylinder failure) 0 0%
Other 2 7.69%
Voters: 26. You may not vote on this poll

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post #1 of 103 Old 09-05-2008, 03:49 PM Thread Starter
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Lightbulb Problems with my truck - details inside - open discussion - poll your opinion!

Out of boredom, I'm going start learning threads for everyone. Hopefully it will be entertaining as well as informative. There will be no wrong answers, but to keep this from becoming derailed, you must follow my simple rules.

Remember, this is real problem, but this will be a learning thread for all. If this works out, maybe I will do this more often.

Rules.

No attacks.

Guessing *IS* allowed, but you can NOT throw out "fuel problem". YOU MUST JUSTIFY YOUR RESPONSE.

I will describe the problem and you have to help figure it out. I *WILL* be running my OWN tests, but for you to know the answer, you have to ask for the test and give a reason why. Most likely I will already have the data before you ask, but if I don't.. I will tell you and give you a time frame.

The Poll

I'll have some generic poll answers. Since I DO NOT KNOW what is wrong, the right answer may or may not be listed. How long will the thread last? Who knows. I'll start working on it this weekend. Since it is not a daily driver, it will be on my own time.

*Big props to David Lott for his quick shipping to make this happen this weekend!

On with the thread.....


Symptoms.
  • Shakes at idle.
  • Will not hold a steady idle at higher rpms not under load (In park, hold rpm @ 2k, distinct -/+ 100rpm bounce).
  • Fuel pressure will not stay constant. Set it to 50psi, drive around, may say 55psi, 60psi, or may still be at 50psi.

What you need to know. - Basics

1999 7.3, pmt2 pcm, dp tuner, stage 3 hybrids.

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Last edited by Dirk; 09-05-2008 at 03:54 PM.
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post #2 of 103 Old 09-05-2008, 07:59 PM Thread Starter
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Wow.. no one?

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post #3 of 103 Old 09-05-2008, 08:03 PM
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I voted for the PCM, but i kind of did it early, my question is, do you have a wait to start light?

My truck did something similar to this for a few days then I lost the whole truck, would run only on either... turned out the computer went bad, but before it did, was sending mixed up signals to the fuel pump, which burned it out aswell


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but at work I drive
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post #4 of 103 Old 09-05-2008, 08:11 PM
I have excessive flatulance!!
 
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Can we ask questions like... Did u pull any codes?

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post #5 of 103 Old 09-05-2008, 08:19 PM Thread Starter
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Quote:
Originally Posted by cchase View Post
I voted for the PCM, but i kind of did it early, my question is, do you have a wait to start light?

My truck did something similar to this for a few days then I lost the whole truck, would run only on either... turned out the computer went bad, but before it did, was sending mixed up signals to the fuel pump, which burned it out aswell
Wait to start light works fine. Truck starts up fine.

Quote:
Originally Posted by Diesel Nick View Post
Can we ask questions like... Did u pull any codes?
YES!

Pulled codes tonight. Codes were for the AIH (which I don't have) and EBPV.

For the sake of argument, I'll buy a new sensor tomorrow. I don't think it's bad, I think the tube has a hole in it. Or at least I think I see a hole in it.

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post #6 of 103 Old 09-05-2008, 08:39 PM Thread Starter
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To add, I pulled the codes via MT2500.

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post #7 of 103 Old 09-05-2008, 08:40 PM
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I voted HPOP thinking this is what is wrong with my rig as well.... but then again, I'm just a girl.

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post #8 of 103 Old 09-05-2008, 08:43 PM
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Quote:
Originally Posted by Dirk View Post
Wait to start light works fine. Truck starts up fine.



YES!

Pulled codes tonight. Codes were for the AIH (which I don't have) and EBPV.

For the sake of argument, I'll buy a new sensor tomorrow. I don't think it's bad, I think the tube has a hole in it. Or at least I think I see a hole in it.
this isnt your problem, but replace the line for the EBPV is like 40 bucks, but sence ours dry rot and get holes, it robs you of alot of boost, mine was like that and i thought i had serious problems, then changed it out and it was night and day, it just sounded alot smoother under load.

i would change my vote to IDM or injectors (maybe sticking) sence you have wait to start light, and its starting just fine. unless more issues come up


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but at work I drive
16 E-450s 7.3 powerstroke Ambulances
7 Duramaxes
1 GMC Kodiak Ambulance

NO CUMMINS.....
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post #9 of 103 Old 09-05-2008, 08:52 PM Thread Starter
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Quote:
Originally Posted by cchase View Post
this isnt your problem, but replace the line for the EBPV is like 40 bucks, but sence ours dry rot and get holes, it robs you of alot of boost, mine was like that and i thought i had serious problems, then changed it out and it was night and day, it just sounded alot smoother under load.

i would change my vote to IDM or injectors (maybe sticking) sence you have wait to start light, and its starting just fine. unless more issues come up

Agreed. I am replacing it just for this thread.


I can only do specific tests that people suggest and why.


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post #10 of 103 Old 09-05-2008, 08:59 PM
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I would like to see the results of a injector buzz test. this will show if the injectors are running correctly, and would also help elimiate an IDM problem.


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Driving an Audi till then...
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but at work I drive
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7 Duramaxes
1 GMC Kodiak Ambulance

NO CUMMINS.....
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