rough idle & smoke
Thread Starter
|
Senior User
Joined: Dec 2003
Posts: 116
Likes: 0
From: central california
rough idle & smoke
This started about 7mounths ago When I start my f-250 7.3 banks turbo 4x4 truck I have a rough idle and smoke coming from the tail pipe I can smell a heavy deisel odor It seams to run fine going down the road but I have noticed a 2to3 mile drop in fuel milage around town and about 1 mile on the hwy. I want to add that the rough start up and smoke does not happen all the time but it is more often than not. your input and thoughts would be appreciated.
Hotshot
Joined: Feb 2004
Posts: 11,697
Likes: 3
From: Marengo, Iowa
first guess would be an injector issue, like one is failing and releasing pressure too easily, be it leaking or early release. Might be time for a set of new or rebuilt injectors. It's best to replace them in a set, besides, if one is bad, how much longer would it be before another fails? (Been having this discussion with my father, as yet to get him to listen... his truck just died so maybe I can get the point across... he has been having idle and smoke issues as well, and a couple of the injectors have been tested and were failed... now it won't idle at all.)
Posting Guru
Joined: Sep 2002
Posts: 1,897
Likes: 0
From: Northeastern Pa - USA
ski ... you could short out the injectors, one at a time, to determine which is bad and that would also help you determine if it is an injector. with the engine off, loosen all the cap nuts on the fuel lines on each injector, retighten each one, just snug. After starting the engine, go around and loosen each one, one at a time. the one that makes no difference in idle is the culprit. give each one time to get its breath back before moving to the next one. BE CAREFUL AROUND MOVING PARTS !!!!!!!!!
Thread Starter
|
Senior User
Joined: Dec 2003
Posts: 116
Likes: 0
From: central california
Well I got new injectors off ebay and installed them this weekend. I had two injectors leaking and a couple where gummed up. It took me about 5 hours to do the job. The truck runs great. I think I might have some air in the lines its just little rough on start up but then smooths right up. Thank for the help
Gary
Gary
Hotshot
Joined: Feb 2004
Posts: 11,697
Likes: 3
From: Marengo, Iowa
thanks for letting us know how it went! If you still have the return line from the injectors to the filter housing, disconnect it and plug it off on both ends. There is a check valve on the filter housing that fails and can contribute to your symptoms.
Trending Topics
Thread Starter
|
Senior User
Joined: Dec 2003
Posts: 116
Likes: 0
From: central california
I dont quite understaned what you are trying to tell me. how will I know if the check valve is bad after pluging off the return line.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
Hotshot
Joined: Feb 2004
Posts: 11,697
Likes: 3
From: Marengo, Iowa
You won't... but they tend to fail, and the recommended repair is to just plug it off. On mine, it got to where every time I started it, it would start for 30 seconds, then die, then I had to crank and crank, like it was out of fuel. It was, basically, because it had drained off the filter. To save some trouble, just plug it off before it fails if nothing more. Also, check the return lines for any leaks, if you have any air getting in at all, it will airlock the injection system, a little air will still let it run, but it will run rough.
Thread
Thread Starter
Forum
Replies
Last Post
dwood3311
6.0L Power Stroke Diesel
16
Nov 18, 2011 10:36 AM
capscrap
Pre-Power Stroke Diesel (7.3L IDI & 6.9L)
8
Dec 9, 2006 09:07 PM
captive
Pre-Power Stroke Diesel (7.3L IDI & 6.9L)
7
Apr 7, 2005 12:49 PM
