7.3 wont start - Ford Powerstroke Diesel Forum
LinkBack Thread Tools Display Modes
post #1 of 4 Old 09-19-2013, 06:48 PM Thread Starter
Compression Ignition Addict
Join Date: Oct 2008
Posts: 253
Thanks: 0
Thanked 2 Times in 2 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
7.3 wont start

I am trying to help my brother out but am out of town so dont have the ability to hook up my AE for a couple weeks till I return. He has had previous starting issues with the truck and has gotten worse over time now it takes cranking till the batteries are almost dead to get it to start, it starts smoking white after about 20 seconds of cranking. The last time he had issues they swaped injectors with another set of used ones and replaced all glow plugs which helped with starting but still required extended cranking. They performed a compression test and dont recall exact numbers now but believe one was low 200s and rest were mid 3s.

So far he has replaced batteries, starter, icp sensor, spare IDM (previous to this the truck would set a SEL light when under acceleration but never any codes were stored), and cps. He had his edge hooked up and when cranking he gets a the ICP less/greater than expected and when cleared it comes right back when cranking.

He doesnt have the time to wait till I can get back and dont want to see him throw parts at the truck since it is a farm truck with 300k on it. My thinking is either injectors or the low compression in one cylinder causing the issues. Any advice on what he should be checking next before buying more parts, I suggested removing the valve covers with it running to watch injectors for oil. Would one cylinder with low compression cause that much of a hard start?

Could this be an issue with the IPR?


Last edited by cory99; 09-19-2013 at 06:53 PM.
cory99 is offline  
post #2 of 4 Old 09-19-2013, 06:58 PM
Serving Our Country!
alaskan155's Avatar
Join Date: Mar 2013
Posts: 1,115
Thanks: 11
Thanked 44 Times in 43 Posts
Mentioned: 0 Post(s)
Quoted: 57 Post(s)
Feedback Score: 1 reviews
when was the fuel pickup last replaced? can it go below a quarter tank?

i know the pickup valve on these trucks has a check valve maybe it broke/went bad? seen a few post on it here and there, if the check valve is broke the fuel could be draining back causing air to be in the line

just a check thought, any codes before you replace anything?(oriellies will scan it for free)

2002 F250 7.3/JW Tow master 4r100 206k miles
Mods:explorer heater valve, WR GP relay, RiffRAff boots, lariat overhead console, Hydra chip, 6637 mod, 6.0 cooler, AIH delete and isspro2 trans, egt, and boost gauges. 92 gallon aux tank with a total capacity of 130gallons, 1800 mile range , 4" MBRP straight Piped. 2" Warrior shackles
alaskan155 is offline  
post #3 of 4 Old 09-20-2013, 05:50 PM Thread Starter
Compression Ignition Addict
Join Date: Oct 2008
Posts: 253
Thanks: 0
Thanked 2 Times in 2 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Some more info he tried a new ipr today and still no changes. He did a cojpression check and all are around 300 with one being 210. I know the numbers arent great but would it be that hard to start with only one really bad hole or would it likely be injectors?
cory99 is offline  
post #4 of 4 Old 09-25-2013, 06:44 PM
WNY Biodiesel Co-op
greasyF250's Avatar
Join Date: Mar 2008
Location: Orchard Park New York
Posts: 898
Thanks: 3
Thanked 2 Times in 2 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Worn injectors make for hard starts , low compression , bad glow plugs , aren't going to help.

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  

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