need advice before rebuild my IPR, truck running rough! - Ford Powerstroke Diesel Forum
User Tag List

LinkBack Thread Tools Display Modes
post #1 of 5 Old 10-19-2011, 02:36 PM Thread Starter
Premium Member
Join Date: Sep 2011
Posts: 15
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Angry 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
eyyu is offline  
Sponsored Links
post #2 of 5 Old 10-19-2011, 03:17 PM
Serving Our Country!
JSchuricht's Avatar
Join Date: Aug 2007
Location: Manor, TX
Posts: 2,961
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 23 Times in 22 Posts
Feedback Score: 2 reviews
Do you have access to a scanner. Would take a lot of the guess work out of the equation if you could pull codes and check values. Just a guess, but try pulling the plug off the ICP sensor and see if it runs any smoother. Also check for any oil getting into the connection, as it may be going bad.

JSchuricht is offline  
post #3 of 5 Old 10-19-2011, 04:14 PM
Compression Ignition Addict
Patrick Feeley's Avatar
Join Date: Oct 2011
Location: Tehachapi, CA
Posts: 2,072
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Thanks: 0
Thanked 67 Times in 65 Posts
Feedback Score: 0 reviews
Also do a real good inspection of the IPR wiring and the fuel bowl wiring harness (IPR wiring is part of that harness). Diesel fuel does some nasty things to the wiring insulation and can cause all kinds of problems (inside the loom too). Cheers!

1997 F250 SC 4x4, E4OD, 4.10 LS, Basically Stock, Relocated Block Heater Plug, External Trans Filter, Tru-Cool Max, I/C Mounted but not Plumbed

SOLD - 1994 F350 CC DRW 2WD PSD, 5 Speed, 4.10 LS, SBC Con-O, Baldwin Filter, Tymar HPX Hose, DPPI DP, Bilsteins, $12 AIC, Coolant Filter, Explorer Overhead Console, A-Pillar w/ISSPRO Black Ice, EV Boost, and EV Pyro, Modified Pedestal, Gutted EBPV.
Patrick Feeley is offline  
post #4 of 5 Old 10-19-2011, 07:50 PM Thread Starter
Premium Member
Join Date: Sep 2011
Posts: 15
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
JSchuricht, while it's runing well and I pull the ICP plug, it gets bad (as it supposed to be). I did not test this when it keeps cutting off. I'll do it when I get the opportunity.

Patrick, When I pull the IPR to do the rebuild, I'll check all the connectors carefully.

I do not have a scanner and I'm scared to drive her anyway once I get her started. I'll just buy a cheap one from Autozone. Thanks a lot.

It's kind of cold this week in st. louis, 40s in the Bush statium. I'll rebuild the IPR once it warms up outside. Hopefully someone can give me more insights. Erwin
eyyu is offline  
post #5 of 5 Old 10-19-2011, 08:22 PM
WNY Biodiesel Co-op
greasyF250's Avatar
Join Date: Mar 2008
Location: Orchard Park New York
Posts: 887
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 3
Thanked 2 Times in 2 Posts
Feedback Score: 0 reviews
A cheap autozone code reader won't read the codes on our trucks .you will need autoenginuity or another high quality scanner.

2000 F250 King Ranch Crew Cab 7.3L LB 4X4 100% home brewed Biodiesel
ZF6 6SPD trans
Zoo Dad Mod
DP F5 Tuner
Wicked Wheel
AFE Intake
4" straight exhaust with 5" tip
Isspro 3 Gauge Pod
285/75/16 Cooper ATP on factory 16's
Banks Big Head
greasyF250 is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome