96 7.3 Federal PCM with single shot 160cc 30% larger nozzle issues - Ford Powerstroke Diesel Forum
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 14 Old 06-20-2019, 02:36 PM Thread Starter
Powerstroke.org Rookie
 
Join Date: Jun 2019
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
96 7.3 Federal PCM with single shot 160cc 30% larger nozzle issues

Hi Guys,

I have a 96 F350 7.3 that just started to have an issue that I can't seem to fix/ figure out.

This is my 4th 7.3 (1 93 IDI, 1 97 7.3 DI, 1 early 99 DI) and this is the first one that has give me any real trouble.

It has stalled out and died leaving me stranded twice in the last two days.

The first night it stalled out and wouldn't start and threw the P0344 code and so I installed a new CPS in it.

The next day it stalled out and died on my on the freeway (wouldn't start) and threw P0603, P0344, P0340 and P1211...

I got towed to the nearest diesel shop to me who I have great experience with, is well respected around here.

It fired right back right as it got off the tow truck....

He couldn't find anything wrong with it and believes that I am having trouble with my chip interfacing with my PCM (the chip is a custom DP Tuner F5 that the previous owner installed).

We removed the chip from the PCM.

The truck isn't stalling out anymore (since I have gotten it back) but it is running oddly without the chip.

The truck has single shot 160 cc 30% larger nozzle stage one injectors in it, e-fuel, early 99 SD intercooler, and a Terminator T500 HPOP; otherwise the engine is stock.

The truck is idling hi and rough, and the accelerator is very touchy.

My ICP's at idle are pretty low, as low as 418 PSI and my IPR % seem normal at idle around 10%.

I believe that my PCM is a federal one and not a California split shot one.

I live off a dirt road and travel in remote areas of California and Mexico alot and thus reliability is more important to me than performance. I would prefer not to have a chip so that it doesn't rattle loose on a washboard road/ cause issues that can't be fixed in the middle of nowhere.

Am I going to damage the truck running it without a chip with these injectors?

Should I get my PCM reflashed to match the injectors?

Can a local shop do this or do I need to send it to DP and have my truck down for a couple of weeks.


Thank you in advanced!!
BajaSurfRig3.0 is offline  
Sponsored Links
Advertisement
 
post #2 of 14 Old 06-20-2019, 03:39 PM
Compression Ignition Addict
 
00t444e's Avatar
 
Join Date: May 2014
Location: Southern OH
Posts: 2,251
Thanks: 41
Thanked 136 Times in 130 Posts
Mentioned: 12 Post(s)
Quoted: 542 Post(s)
Feedback Score: 0 reviews
Yes you need a custom tune for those injectors and there is only a handful of companies that can tune your PCM, DP tuner is one of those companies.
00t444e is offline  
post #3 of 14 Old 06-21-2019, 02:33 AM
Compression Ignition Addict
 
Join Date: Mar 2011
Location: Tx
Posts: 3,646
Thanks: 6
Thanked 272 Times in 271 Posts
Mentioned: 11 Post(s)
Quoted: 297 Post(s)
Feedback Score: 0 reviews
Those 30% nozzles require the tuning.
White95f250 is offline  
Sponsored Links
Advertisement
 
post #4 of 14 Old 06-21-2019, 07:39 AM Thread Starter
Powerstroke.org Rookie
 
Join Date: Jun 2019
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Thank you for the response guys!

Should I just re-install the chip? Is there a way to secure it other than duct tape?


Will I damage my motor/injectors/etc. running it without the chip?


Where is the best source to find another federal PCM (I live in California so most of the trucks in the junk yards here have CA PCM's).


What is the most reliable option (especially for running long dirt roads in the middle of nowhere).

Last edited by BajaSurfRig3.0; 06-21-2019 at 07:50 AM.
BajaSurfRig3.0 is offline  
post #5 of 14 Old 06-21-2019, 08:37 AM
Compression Ignition Addict
 
Join Date: Mar 2011
Location: Tx
Posts: 3,646
Thanks: 6
Thanked 272 Times in 271 Posts
Mentioned: 11 Post(s)
Quoted: 297 Post(s)
Feedback Score: 0 reviews
White95f250 is offline  
post #6 of 14 Old 06-21-2019, 09:15 AM
Compression Ignition Addict
 
00t444e's Avatar
 
Join Date: May 2014
Location: Southern OH
Posts: 2,251
Thanks: 41
Thanked 136 Times in 130 Posts
Mentioned: 12 Post(s)
Quoted: 542 Post(s)
Feedback Score: 0 reviews
If your trying to find a spare pcm to send in an have it flashed it doesn't matter what the factory programming is, the tuning will override it, I believe you could even use a superduty pcm, you may want to get whole of a shop that tunes them to verify that.

Last edited by 00t444e; 06-21-2019 at 09:18 AM.
00t444e is offline  
post #7 of 14 Old 06-21-2019, 10:11 AM Thread Starter
Powerstroke.org Rookie
 
Join Date: Jun 2019
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
00t444e thanks for that input.

I left a message with DP Tuner and will be in touch with them on Monday.

I am going to clean the PCM terminals, re-install the chip and duct tape it per their website instructions and run the truck for a couple of days. If there are no issues I am going to assume that the chip had rattled loose.

At some point I plan on getting another PCM and having DP Tuner flash it with the stock modified tunes that will work with my injectors to eliminate the chip.

I am driving to rural Baja Sur in a week for a couple of weeks and want to get his sorted before I leave so it doesn't die on me in the middle of nowhere.
BajaSurfRig3.0 is offline  
post #8 of 14 Old 06-21-2019, 05:54 PM
Compression Ignition Addict
 
Patrick Feeley's Avatar
 
Join Date: Oct 2011
Location: Tehachapi, CA
Posts: 2,695
Thanks: 0
Thanked 146 Times in 144 Posts
Mentioned: 2 Post(s)
Quoted: 73 Post(s)
Feedback Score: 0 reviews
I'm sure an SD PCM would be pinned out completely differently than an OBS PCM. Heck, the OBS Cali 97 DPC-312/311 were completely different than an OBS Federal DPC-202/203. Cheers!
Patrick Feeley is offline  
post #9 of 14 Old 06-21-2019, 06:02 PM

 
Corey@CNCFAB's Avatar
 
Join Date: Apr 2010
Location: Defiance, OH
Posts: 12,590
Thanks: 1,217
Thanked 859 Times in 795 Posts
Mentioned: 1129 Post(s)
Quoted: 1388 Post(s)
Feedback Score: 4 reviews
What Patrick said. ^^^^

Also, a Federal OBS PCM is already a single shot computer, so getting it to idle right won't be an issue assuming if everything was fine even without tuning. But you do need custom tuning for 160/30's to run properly.

Check the wiring to the IPR and the nut on the backside of it.

www.cncfab.us

[SIZE="3"]For all your ford powerstroke needs. If you dont see what you are looking for on the website, please use the contact page and shoot us a message or
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Part numbers will help alot too if they are not on our site.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
post #10 of 14 Old 06-24-2019, 11:27 AM Thread Starter
Powerstroke.org Rookie
 
Join Date: Jun 2019
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
I gently cleaned the terminals on the PCM and reinstalled the chip with some duct tape and the truck is running amazing again.

The only issue is the F5 selector isn't lighting up.

It feels like it is on stock modified which is what I usually run.

Will I have any issues not having the selector working?

Should I take the PCM out again and double check the chip/ wire for the tune selector connection?

I am leaving this Friday for Baja Sur and want to make sure that this rig is as reliable as possible.
BajaSurfRig3.0 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

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

Password:


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

Email Address:
OR

Log-in










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