Getting the underboost shake again
Lead Driver
Joined: Dec 2006
Posts: 6,496
Likes: 94
From: So. Jersey
I'd concentrate on finding someone that can do a cylinder contribution test first so you can narrow it down to a cylinder or 2. Even if you have to pay an hour shop rate it will pay off instead of throwing unnecessary parts at it.
Thread Starter
|
Laughing Gas
Joined: Oct 2012
Posts: 1,202
Likes: 1
From: Frederick MD
Update. It looks like it's sticktion as you said. Changed the oil yesterday and added ar9100 and it hasn't repeated the issue. So I will be going and getting the test done to see what injectors it is.
Fleet Mechanic
Joined: Jul 2013
Posts: 1,402
Likes: 114
From: Tuscaloosa, AL
I'm running the archoil 2300 now with Delvac 5w40 in an attempt to clean the spool valves. I'll know how successful this is this winter, but it appears I'm getting 1mpg better mileage in the 1000 miles since the change.
Thread Starter
|
Laughing Gas
Joined: Oct 2012
Posts: 1,202
Likes: 1
From: Frederick MD
We'll today they said injectors where good. Truck still had a very slight shutter and is starting to have an extended crank as the temps drop. I think I'm Gona send my ficm to Ed to get checked. The other question is with no codes do you think I should replace the ebp sensor and pig tail?
New User
Joined: Nov 2005
Posts: 4
Likes: 0
Different path here.
I was getting a bad shake, it would rattle everything.
Turned out to be the Fuel Injection Wire Harness, turns out they rub on everything under the hood even though they were upgraded in late 2004, they are still an issue, mine (2005) had about 3 spots that were worn through and 1 broken plug, most likely from the head gasket job at the local dealership, no codes at all, my new shop found it by wiggling all the injector plugs while it was idling, the harness is under $200.00, available everywhere, again pointing to a large number of failures.
I was getting a bad shake, it would rattle everything.
Turned out to be the Fuel Injection Wire Harness, turns out they rub on everything under the hood even though they were upgraded in late 2004, they are still an issue, mine (2005) had about 3 spots that were worn through and 1 broken plug, most likely from the head gasket job at the local dealership, no codes at all, my new shop found it by wiggling all the injector plugs while it was idling, the harness is under $200.00, available everywhere, again pointing to a large number of failures.
Posting Guru
Joined: Jul 2006
Posts: 1,181
Likes: 1
From: Fairfield, CA
https://www.ford-trucks.com/forums/1...see-video.html
Maybe a sticking intake or exhaust valve?? Let us know what you find.
New User
Joined: Nov 2005
Posts: 4
Likes: 0
Unusual that the next reply said their #8 cylinder was dead, but that was the cylinder that was bad on mine and it was from a bad F.I. harness, that was the most worn spot, when the tech moved the harness the idle noise went away.
Can't say that's your problem, just sounds kind of like mine.
Oh, one more thing, 3 weeks after I had the F.I. harness replaced, the logic side of the FICM died, power side good.
I also have new batteries and alternator, 10 months old, no charging issues, good power.
Good Luck
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
|
Laughing Gas
Joined: Oct 2012
Posts: 1,202
Likes: 1
From: Frederick MD
What would cause excessive cranking when the nose is down hill only? I will post videos as soon as it starts working. Also went through the harness and didn't find anything to bad.
Thread Starter
|
Laughing Gas
Joined: Oct 2012
Posts: 1,202
Likes: 1
From: Frederick MD
This video is facing up hill
http://s1336.photobucket.com/user/ia...ohijp.mp4.html
This is facing down hill
http://s1336.photobucket.com/user/ia...93x68.mp4.html
Why is the icp psi taking so long to build down hill?
http://s1336.photobucket.com/user/ia...ohijp.mp4.html
This is facing down hill
http://s1336.photobucket.com/user/ia...93x68.mp4.html
Why is the icp psi taking so long to build down hill?
Posting Guru
Joined: Dec 2012
Posts: 2,169
Likes: 3
From: SW Florida
If I remember correctly, there is a seal in the HPOP that will cause those symptoms. When parked downhill, the oil leaks past the seal when it is parked....so when you go to start, is has to be primed back up.
Thread Starter
|
Laughing Gas
Joined: Oct 2012
Posts: 1,202
Likes: 1
From: Frederick MD
That's what I thought I couldn't remember if it did that parked up hill or down hill
Posting Guru
Joined: Dec 2012
Posts: 2,169
Likes: 3
From: SW Florida
Thread
Thread Starter
Forum
Replies
Last Post