7.3 surging problem under load - 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 04-28-2013, 07:03 PM
Powerstroke.org Rookie

Join Date: Nov 2009
Posts: 27
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
7.3 surging problem under load

I have a 2000 7.3 F-350 6-speed with 195k miles. It is bone stock, no chip, and I believe original injectors. I'm having a couple problems with it, they could be related, but I'm not sure. Let me start off by saying that I just replaced the IPR and ICP with good Motorcraft parts. I thought this was the problem but didnt solve it.

1) When the engine is cold and hasn't been running after sitting all night, it is very rough idle and doggy, shakes real bad. You have to take off in Low gear so it doesn't die. Once you drive down the road for a while, and you drive it somewhat hard, it is like the flip of a switch and clears out and runs just fine. It will be just fine for the rest of the day and until it sits overnight.

2) The other problem is when driving down the road, and get rolling to at least probably 35 mph, the truck will start surging and jerking. If you get into the throttle it usually smoothes out and runs fine. But as soon as you ease off the throttle it starts surging and jumping and jerking again, until you let off or hammer on the throttle. It tends to be worse when we have our 36' enclosed gooseneck trailer behind it, which is a good bit of weight. But it still will do it without the trailer.

I scanned it with a good snap-on scanner, and it gave me the codes:
-P0107 map/BP sensor circuit low
-P0118 ECT circuit high input
-P1249 wastegate control valve
-P0475 exhaust pressure control
valve fault

The reason for the wastegate code I believe is because I unplugged the wire that's on the front of the turbo mount I believe it was because the wastegate would stick open driving down the road and hiss real bad. I need to clean the tube that I read about on here and hook the wire back up.

The map sensor code is what my thoughts are right now, but I also thought and have read a lot about the Cam Position Sensor. Could it cause these problems?
And I also thought about the throttle position sensor.

Any ideas guys? Thanks in advance!
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 03:57 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.