p1248 again - Ford Powerstroke Diesel Forum
Please Visit our Site Sponsors
Powerstroke.org is the premier Diesel Truck Forum on the internet. Registered Users do not see the above ads.
LinkBack Thread Tools Display Modes
Old 01-05-2013, 03:47 PM
Compression Ignition Addict

Join Date: Nov 2012
Posts: 172
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
Question p1248 again *solved*


After replacing the MAP sensor a week ago and hearing the whistle, we thought we had left these codes behind but this was not to be.

After driving the truck tonight and realizing there is either low or no boost, I scanned it using AE. I found p1248 which didn't surprise me.

After returning back, I lifted the hood and looking carefully using a bright light saw traces of soot on both sides but esp on the passenger side firewall. I recently had a Diamond Eye 4" system installed and saw traces on the down pipe as well. I could actually detect faint exhaust vapors spewing from that general area which was visible due to the bright light.

My plan of action is to pressure the intake system to detect leaks and likely replace the intake boots and up pipes..prob the Int'l bellowed ones.

I will check the downpipe clamp for tightness tomorrow although I think the soot is likely coming from the up pipe.

I noticed today that the MAP stayed at about 14.5 no matter what.

BTW, there is virtually no visible smoke despite no boost. Shouldn't this thing be smoking like a freight train?

Does this sound like a reasonable approach? Any suggestions are greatly appreciated.

*fixed* While investigating the problem while out on lunch break, I discovered that one of the intercooler pipes had slipped off its boot.

I now have boost although not sure how much.

Last edited by lght1; 01-08-2013 at 05:49 PM. Reason: problem solved
Reply With Quote Quick reply to this message
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:
What state or province do you live in?
Security Question
*Required, this field is not shown to others. Enter the last two characters of the word "Powerstroke"
Security Question #2
*Required, this field is not shown to others. "While balancing on a piece of wood, two inches by four inches known as a 2x4, john and his friend sally both spotted a dalmatian inside a truck with sirens, headed to put out a fire. State the animal mentioned in the sentence above."
Please select your insurance company (Optional)


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
Display Modes

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

All times are GMT -8. The time now is 05:29 AM.

Powered by vBulletin® Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.1
Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.