More IDM woes
Thread Starter
|
Senior User
Joined: Nov 2008
Posts: 460
Likes: 0
From: Gifford, IL
More IDM woes
So after my friends 01 stroke w/ 160k miles died while idling and threw an IDM code, we plugged the IDM into another truck, which wouldnt start. So The IDM was clearly the problem. Since my friends truck was not at home, we stole an IDM from another truck to get his home. He plugged in the other IDM and got it running, but now we have more problems. In his words, it runs like crap, is very loud, and sounds like its missing. It is also throwing the IDM code ( T1316 i think, same as before ), and an internal memory code which he says is from unplugging the wiring harnesses and plugging them back in. It had a rough idle before all this happened and didnt run the greatest, but now its worse than ever. Awhile back he run some very bad bio threw his truck and the glycerin plugged it all up, but after changing a couple filters and cleaning out the pick up pump it ran ok. Any ideas what could cause it to throw the codes again on a different IDM that works just fine and make it run like crap? Sorry its a long thread, but I want to give as much info as possible. Any help is greatly appreciated.
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
What are you using to pull the codes, and can it do any other tests? You need to look at doing an injector buzz test and cylinder contribution test to see if you've got a screwed up injector(s). You can also check for damaged wiring or a loose plug under the valve cover.
If you're using a tuner to pull the codes, try pulling both valve covers and check the wiring, then watch the oil discharge from each injector at idle. That will give you an idea if one or more of his injectors are not firing.
If you're using a tuner to pull the codes, try pulling both valve covers and check the wiring, then watch the oil discharge from each injector at idle. That will give you an idea if one or more of his injectors are not firing.
Post Fiend
Joined: Feb 2006
Posts: 11,892
Likes: 2
From: Middle Tennessee
Well, I was typing slow and watching TV. I agree with f350/Chris. Here is what I had typed:
My first guess would be a short somewhere that is causing the rough running. I would be afraid of burning up the borrowed IDM too until this problem is found.
Keep in mind that I am just guessing here, but I would start with a close inspection of the UVC harness (especially near the valve train) and go back from there. Good luck. Others who have had this problem may hopefully chime in.
My first guess would be a short somewhere that is causing the rough running. I would be afraid of burning up the borrowed IDM too until this problem is found.
Keep in mind that I am just guessing here, but I would start with a close inspection of the UVC harness (especially near the valve train) and go back from there. Good luck. Others who have had this problem may hopefully chime in.
Thread Starter
|
Senior User
Joined: Nov 2008
Posts: 460
Likes: 0
From: Gifford, IL
He's been using his superchips to pull codes, but he works at a tire shop and thats currently where his truck sits. He's got access to alot of tools and testing equipment so I'll tell him to try those tests. He did replace his #8 injector about six months ago. You think this could all be caused by some loose connections? What is an injector buzz test?
Thread Starter
|
Senior User
Joined: Nov 2008
Posts: 460
Likes: 0
From: Gifford, IL
We did have the valve cover gaskets off a long time ago when we were checkin to see if the glow plugs were bad, but that wouldn't take a year to cause problems I wouldnt think.
Trending Topics
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
Unless the tire shop does work on a lot of diesels, the test equipment they have may not be of much use.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
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
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
Thread Starter
|
Senior User
Joined: Nov 2008
Posts: 460
Likes: 0
From: Gifford, IL
He was pretty careful about keeping the junk from going past the filter, but is there anything else it could clog up and cause the fuel pressure to be low? I've read that there is a screen in the fuel pressure regulator, and we were gonna pull it, clean it, and shim the spring in case the fuel pressure was just low.
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
He was pretty careful about keeping the junk from going past the filter, but is there anything else it could clog up and cause the fuel pressure to be low? I've read that there is a screen in the fuel pressure regulator, and we were gonna pull it, clean it, and shim the spring in case the fuel pressure was just low.
A fuel restriction will typically show itself at top end or under load. The truck will usually idle fine all day long if it's a fuel pressure issue.
Thread Starter
|
Senior User
Joined: Nov 2008
Posts: 460
Likes: 0
From: Gifford, IL
It was about the viscosity of motor oil. He cleaned the screen in the pick up tube which was pretty dirty. Where would the 2 little cylinder screens be at? Are they hard to get to and clean out?
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
They're inside the white thing on the pick up tube. They're supposed to look like this
not like this
Just remember, I don't think this is related to your IDM codes or rough running. Just meant as an FYI that may prevent some future problem from appearing.
Let us know what you find on the CCT or by watching the oil discharge from the injectors.
not like this
Just remember, I don't think this is related to your IDM codes or rough running. Just meant as an FYI that may prevent some future problem from appearing.
Let us know what you find on the CCT or by watching the oil discharge from the injectors.
Post Fiend
Joined: Feb 2006
Posts: 11,892
Likes: 2
From: Middle Tennessee
IDK why you think fuel is causing the IDM woes? Why not put a fuel gauge on it and see what it is doing?
LOL, multitasking and chasing Chris still.
Thread Starter
|
Senior User
Joined: Nov 2008
Posts: 460
Likes: 0
From: Gifford, IL
I don't think the two are related, but we were going to start looking for the problem of the rough running the day it quit, oddly enough. The main concern is the IDM codes, but while I'm at it i thought i'd try to fix em both lol. After driving it for a few min, the service engine light went off, but he hasn't tried clearin the codes and seeing what happens yet, he's at work so that wont be till later.
Postmaster
Joined: Jun 2006
Posts: 2,647
Likes: 0
From: Fulltime RVer
Look at the pic in post #14 here...
Messed with injector harnesses, SHAZZAM!
https://www.ford-trucks.com/forums/6...s-shazzam.html
... and check that you haven't rubbed through the insulation on one of those wires. You can also use the search word "UVC" and my username "ernesteugene" and search only the 7.3L forum and get more details!
In this thread, I mention the potential issue of PCMs needing to be mated with the appropriate IDM, and I'm not sure if you can mix and match with impunity!
https://www.ford-trucks.com/forums/6...y-running.html
Messed with injector harnesses, SHAZZAM!
https://www.ford-trucks.com/forums/6...s-shazzam.html
... and check that you haven't rubbed through the insulation on one of those wires. You can also use the search word "UVC" and my username "ernesteugene" and search only the 7.3L forum and get more details!
In this thread, I mention the potential issue of PCMs needing to be mated with the appropriate IDM, and I'm not sure if you can mix and match with impunity!
https://www.ford-trucks.com/forums/6...y-running.html