Emission System Light
Thread Starter
|
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
Originally Posted by Pocket
Without any symptoms, finding the offending sensor is a crap shoot.
Thread Starter
|
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
Mechanic changed the MAP sensor. The crew took it home last night and the intermittent light came back this morning. Mechanic said P1316 was thrown and wanted to clean the injectors?
The service manual says to check for a short, searching the forum everyone says this is probably UVCH related, but the truck never ran rough.
If no one else has any thoughts I guess will be checking resistance at the plugs and see if we can find this ourself.
The service manual says to check for a short, searching the forum everyone says this is probably UVCH related, but the truck never ran rough.
If no one else has any thoughts I guess will be checking resistance at the plugs and see if we can find this ourself.
Post Fiend
Joined: Jun 2004
Posts: 9,293
Likes: 10
From: Parker, CO
P1316 is most commonly related to the UVC harnesses. Since in your case the light is very intermittent, then one side or the other may just be slightly loose, enough to set make the SES light flicker, but not enough for you to notice engine wise. Too bad your mechanic stopped there and wanted to clean out your injectors. Wrong move. He should have pulled codes that were stored in the IDM to determine which bank of injectors was giving you the problems. That way you would know which valve cover to pull and inspect the UVC harness. P1316 means that there are codes stored in the IDM itself, and can be retrieved by running an injector buzz test.
Trending Topics
Hotshot
Joined: Feb 2007
Posts: 10,499
Likes: 10
From: Sterling Heights,Mi
Are they standing on it, with a load? around 2300-3500 rpm's when this happens? just a thought, my truck appears to try and flash something at me when I am coming from a dead stop to WOT up to 70 mph while pulling my camper.......
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
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
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Thread Starter
|
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
Have you ever heard the saying "Somewhere in Texas there's a village missing its idiot"?
Well that would be because I hired him and he's driving one of my trucks. I heard later that the driver was telling other guys on the crew how strange it was that when the light came on the truck seemed to run really rough, but would smooth out when the light went off.
It was indeed a loose UVCH connector that also had a chaffed wire. So a new harness and all is well.
Thanks for the input.
Well that would be because I hired him and he's driving one of my trucks. I heard later that the driver was telling other guys on the crew how strange it was that when the light came on the truck seemed to run really rough, but would smooth out when the light went off.
It was indeed a loose UVCH connector that also had a chaffed wire. So a new harness and all is well.
Thanks for the input.
Thread
Thread Starter
Forum
Replies
Last Post
troupstree
1987 - 1996 F150 & Larger F-Series Trucks
12
Jul 7, 2014 11:17 AM
boblewis
1987 - 1996 F150 & Larger F-Series Trucks
1
Mar 2, 2012 07:58 PM
