Fuel filter light flashing at idle in gear? Rough idle - 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 04-06-2013, 07:40 AM
Powerstroke.org Rookie

Join Date: Apr 2013
Posts: 13
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Fuel filter light flashing at idle in gear? Rough idle

Need some help on this, I just got this truck and just replaced the cps to get it to start, now it idles rough while in drive and te fuel filter light starts flashing really fast until you start moving. Any idea?
Reply With Quote Quick reply to this message
Sponsored Links
Old 04-12-2013, 02:01 AM
Powerstroke.org Fanatic

Join Date: May 2011
Posts: 139
Thanks: 1
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
I believe there is a vacuum-reading sender on the fuel filter bowl operating that light. If the sender is working OK, it seems to be indicating excessive restriction in the fuel system.

The normal fix is to open the fuel filter bowl by removing the cap and put in a new fuel filter. I'd wipe the bowl clean and drain it some with the supplied yellow-handled valve on the bowl. While in there, I'd use a small stick (a headless match, etc) to make sure the small screen in the port for the fuel pressure regulator is clean of debris.

After doing this, start the truck and see if any improvement is present. You can check the fuel pressure via the Schrader valve on the bowl using a simple tire pressure gauge covered with a cloth to prevent excessive fuel spray with the engine idling. It should read perhaps 35 to 50 psi at idle.
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 05:02 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.