Proud New Owner - Ford Powerstroke Diesel Forum is the premier Diesel Truck Forum on the internet. Registered Users do not see the above ads.
LinkBack Thread Tools Display Modes
Old 02-11-2011, 08:01 AM Rookie

Join Date: Feb 2011
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Proud New Owner

I recently purchased a 2002 Ford F-350 Crew Cab Short Box 4x4 Lariot with 327k miles. This truck runs, drives and performs excellent. It has an AFE Stage 1 Intake, Manaflow 4 in. exhaust dualed out the back and a BullyDog 4 bank chip. This truck doesn't leak a drop of anything, smoke excessive or have any problems except when the truck is cold from 1200-1800 (about) RPMs the turbo makes a sound as if it was blowing out extra air not going into the engine and the truck kinda feels like its lagging. I live in Texas and we've been having temperatures about 15 degrees and it only does it when its this cold outside. When its warm outside and the truck is "cold" this doesn't happen. When the truck gets to operating temperature it runs great and this doesn't happen. Other than that there is NO turbo lag and the throttle response is great. I have off this weekend and I'm going to check intercooler boots etc. Is there anything else I should be looking for? Any other advice for me is greatly appreciated.
Reply With Quote Quick reply to this message
Sponsored Links
Old 02-11-2011, 08:06 AM
Super Moderator


Join Date: Jul 2008
Location: Orangevale, CA
Posts: 11,524
Thanks: 11
Thanked 100 Times in 94 Posts
Feedback Score: 0 reviews
Congrats on the truck!!!

- Glad to have yo at the .org!

The cold issue you have is probably the EBPV (Exhaust Back Pressure Valve) being closed with the engine is cold(er). The EBPV closes when it's cold to keep heat in the engine to help it warm up. Not a 100% sure, but I believe it's in the output side of the turbo. So, it is restricting the exhaust some, hence the feeling of lagging.
Reply With Quote Quick reply to this message
Old 02-11-2011, 08:22 AM Rookie

Join Date: Feb 2011
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Thanks, I must admit, I've always been a Cummins man but now that I've had a chance to actually own a Powerstroke I LOVE it and don't see myself going back.
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:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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
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 02:26 PM.

Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.1
Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.