just got my AE scanner today. What's next? - Ford Powerstroke Diesel Forum
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post #1 of 5 Old 10-28-2011, 06:18 PM Thread Starter
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just got my AE scanner today. What's next?

installed the software; hooked up the the truck; trying to start ......

Good news so far: my truck does have a live OBD hook up (I wasn't sure about it when I ordered the AE). It's reading parameters.

Not so good news: too much to learn about AE in a short time w/o a good manual (or any manual at all). I'm going to read as much as possible tonight and try more in the morning. Also, I forgot to plug in a few hours before I was trying to start it (~50 degree now in st. louis). As you can read from the background story about the truck below, it's kind of hard to get her started litely.

any good strategies for me to try tomorrow? like parameter combinations. Oh, one thing I did a few minutes ago while I was trying to start it is the injector pressure was readin less than 200 as I crank it.

Anyway, already to my for today. Will report back as soon as I learn how to use the scanner and get any meaningful numbers. Thanks for reading. Erwin

need advice before rebuild my IPR, truck running rough!


1. 95 PSD, manual tran, 140k miles, no check engine light
2. 2nd new CPS sensors tested, >5v to one of the 3 wires, 12v to the other, good rpm reading while cranking.
3. All glow plugs tested well at the valve cover plugs (<1 ohm), 12v to the plugs, WTS light does go on

I already got the IPR rebuild kit ($57 from the dealership for 2 O-rings and a couple pieces of small metal). I'll go ahead get this done anyway just as a PM activity if it does not solve my problems. I'll give all the background I know of concerning the symptoms my truck has and would really appreciate any advices you may have to offer. Thanks in advance.

It all started a few months ago when the engine started to cut out while driving (any speed) randomly. Since itís a clutch truck, the engine does not actually die most of the times. It just keeps cutting out and come back. Sometimes every few seconds. Whenever it dies, it always starts right up with a turn of the key. Thatís why I got the old (not so much, only 3 years old) CPS out and replaced with a new one and it did not help (tried 2 new ones).

I just kept driving the truck for the last 3 months as it keeps doing this and fortunately, it never stranded me. A few days ago, I read about the IPR and decided the poke around it. After I did that (not knowing if itís coincident or not), the truck started to run perfectly throughout the day and will start up right away. I thought that I found the root cause of the problem being the IPR connector until the next day when the symptom changed somehow. Now, it will not easily start (ďcoldĒ at 60 degree). Once it started, it will run almost perfectly most of the times and itís easier to restart. I say ďmost of the timesĒ, because once a while it will have the old symptom again (keeps cutting out). While itís running, if I poke the wires and connector (IPR, ICP, valve cover connectors) I see of hear no difference.

While the truck is running, if I unplug even both of the valve cover plugs, it will run horribly, but it will stay running. So, I donít think that the valve cover plugs are bad, unless all 3 or 4 of them are having bad connection the same time which is unlikely. Very likely, itís something which controls fuel supply to all the injectors (no diesel smell or smoke when itís not starting).

Again, please help me to find out what it is going wrong with my truck so I can use it without fearing being stranded. I have a load of debris which I need to haul it to the dump. My senses tell me not to get it out of my driveway this time before I figure out what it is going on in there. Thanks all for taking time to read this and offer help. Erwin
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post #2 of 5 Old 10-30-2011, 02:38 PM
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ICP should climb quickly. 500 psi is required to activate the IDM to fire the injectors. Either the ICP is out of whack, the IPR is malfunctioning, or the HPOP is weak.

If the injectors weren't firing because of an injector issue, you'd see ~3500 psi after a few seconds of cranking.


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post #3 of 5 Old 10-30-2011, 04:18 PM Thread Starter
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Hi, all. I finally got some data from the AE:

1st. I did all the KOEO and KOEO tests. Here is the results:
ēInjector Buzz test: all injectors sounds right to me. First time listen to a real Buzz test (watched all TheWreckingYard guy vedio).
Code p1277 cyl. #7
1275 #5
1276 #6
1278 #8 high to low side open (what does this all mean?)

ēCyl. Distribution test:

Code P0185 engine oil temp sensor (would this affect the running so much? Iíll replace it anywany, or wiring of it having problem)

2nd. I recorded live data for ICP and engine RPM at idle while itís running like crab. I also recorded the sound with my iPhone as the camera is pointing to the tach. I donít know if and how to upload it.

Does this give us enough data to make some kind of conclusion as to why my engine is constantly cutting out and recent hard to start problem? Up to a few weeks ago, it starts right up even it runs rough. Thanks all for you time and interest. Erwin
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post #4 of 5 Old 10-30-2011, 05:13 PM Thread Starter
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here is the scan data red-ICP other-engine rpm
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post #5 of 5 Old 10-31-2011, 05:17 PM
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Originally Posted by eyyu View Post
here is the scan data red-ICP other-engine rpm
I'd say the two are unrelated. The engine my be running rough but the RPM seems relatively steady. I'd look for other parameters that are erratic.

(But admittedly I don't have an AE, haven't seen an AE, and have a hard time spelling AE. But am a bit envious!)

Denton, TX

I envy those that know exactly which modification to make and in the most logical of sequences. But not enough to trade for my meanderings and misfires.

1996 F250 crew cab/short bed, 4x4, auto PSD, 6637 air filter, interior grab handles, stainless window vents, remote door locks work with engine running mod.
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