1997-2005 5.4l 2valve engines and rough idles - Ford Truck Enthusiasts Forums

1997 - 2003 F150 1997-2003 F150, 1997-1999 F250LD, 7700 & 2004 F150 Heritage

1997-2005 5.4l 2valve engines and rough idles

LinkBack Thread Tools Search this Thread
Old 02-17-2012, 10:44 PM
Longdistancetrucker's Avatar
Longdistancetrucker Longdistancetrucker is offline
Senior User
Thread Starter
Join Date: Mar 2011
Location: Yorktown, NY
Posts: 206
Longdistancetrucker is gaining momentum as a positive member of FTE.
Exclamation 1997-2005 5.4l 2valve engines and rough idles

Just Came across this in the February 2012 issue of Motor Magazine and thought that I should share this as this is a very common thread here on the FTE forum.

"Owners of some 1997-2005 Ford Trucks with the 5.4L two-valve engine may complain of an intermittent rough idle. One likely cause, says Ford, is noncommanded EGR flow. A stuck open EGR vlave is ultimately the culprit.

To make a definitive diagnosis, connect your scan tool, start the engine and allow it to reach normal operating temperature. Next, allow the idle to stabilize, scroll down to the DPFEGR PID on the scanner's display and write down the voltage. Now disconnect the vaccuum hose to the EGR valve and connect a vaccuum pump to its port. Pump the vacuum up until the EGR valve is wide open, then bleed off the vaccuum. Record the DPFEGR voltage again. Repeat this procedure several (about 8) more times.

If the DPFEGR voltage increases by .03 volt or more from the initial reading and the idle gets rough, the EGR valve is probably stuck open. Try tapping the casting with a wrench. If the voltage decreases and the idle now gets smooth, the valve is definitely sticking. Replace it with a revised design, Part No. XL3Z-9D475-CA.

Trucks that can benefit from the upgraded EGR vlave are 1997-99 F-250 light duty pickups, 1997-2004 f-150s, 1998-99 Lincoln Navigators, 1997-2005 E-series vans, 1998-2004 F-super duty pickups and 2000-05 Excursions."

-Tom Rosario (Feb. '12 Motor Magazine - "Service Slants")
Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
Explorer P2104 & P2112 Help jfish1288 Explorer, Sport Trac, Mountaineer & Aviator 3 12-21-2015 09:32 AM
1997 4.0 L suddenly idles bad/misses areyou4real Aerostar 26 11-09-2015 05:19 PM
How to test your DPFE sensor. Reuel Modular V8 (4.6L, 5.4L) 47 06-24-2015 09:37 PM
P0401 EGR insufficient flow - usual initial fixes haven't worked MeanMark87 1997 - 2003 F150 3 06-14-2014 09:58 PM
Rough Idle with PO156-P1131-P1151 codes SteevenH 1997 - 2003 F150 7 03-29-2014 12:20 PM

Go Back   Ford Truck Enthusiasts Forums >

02, 03, 54, 54l, egr, f150, f250, idle, idles, rough, v8

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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

Forum Jump

All times are GMT -5. The time now is 11:00 PM.

This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.