possible lpop diagnosis question - Ford Powerstroke Diesel Forum
Powerstroke.org is the premier Diesel Truck Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 01-09-2013, 06:29 PM
Powerstroke.org Rookie
 

Join Date: Nov 2011
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
possible lpop diagnosis question

any help would be appreciated with this. 2003 6.0 excursion. hpop replaced at 140k along with oil cooler and new egr valve. fresh injectors from warren diesal at 180k. otherwise stock. truck now has 225k and in the past month developed a popping noise in the front end at the air intake. this truck has been virtually trouble free other than these issues. the popping noise seems to be air being expelled back into the intake as if an exhaust valve is not opening thus forcing air back out the intake. the truck starts with no problem. the engine runs fine after it gets warm. the engine needs about a 10-15 minute warmup before hitting the road which has never been necessary prior to this situation. btw, i am in south florida. this thing needs to warm up even after it has been 70 plus degrees overnight. mechanic has had a hard time diagnosing this popping sound. the truck runs too good to throw the right code apparnetly but is obviously not running properly. he thinks that the lpop is beginning to fail and that the lifters are not liking the loss of pressure resulting in valve, lifter, rocker arm malfuction, resulting in the popping. this sounds reasonable to me. this particular mechanic has solved many problems for friends of mine that others could not solve. he admits this issue is a difficult one to diagnose. what do you guys think?
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 01-09-2013, 08:56 PM
Compression Ignition Addict
 

Join Date: Apr 2012
Posts: 1,065
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
if the lpop were worn, you should see higher than normal ipr duty cycle at idle. since the valve would need to close to increase icp due to lack of lpo. i would assume anyways.
just have him throw a pressure gauge on the low side. there is a fitting right off the front of the oil cooler housing for it.
Reply With Quote Quick reply to this message
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:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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:

Log-in

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 06:08 AM.


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.

vB.Sponsors