shuddering with less power....
Thread Starter
|
Freshman User
Joined: Jun 2004
Posts: 42
Likes: 0
From: Glendale, AZ
shuddering with less power....
Usually I can search thru threads and find the info I'm looking for....however, this time I can't seem to find what I'm looking for.....
So, here is my issue...when I leave a stoplight, at about 1700-2000 rpm, the truck seems to be shuddering slightly. It isn't a really bad issue yet, but I'd like to figure it out before it gets worse......When it is shuddering, it seems to have a lot less power.
I am due to change my fuel filters, so that is one thing that will be done by the weekend. I have also had the under valve cover wire harness come loose, and I suppose that it is possible this could be a re-occurance of that, but symptoms aren't as severe as when that happened before.
I have also checked the turbo, no play and all fins look nice and sharp with no chips.
Also to give you more info, my truck is an 01, 7.3 with cpr fuel system, 6637 filter, otherwise stock......
So, here is my issue...when I leave a stoplight, at about 1700-2000 rpm, the truck seems to be shuddering slightly. It isn't a really bad issue yet, but I'd like to figure it out before it gets worse......When it is shuddering, it seems to have a lot less power.
I am due to change my fuel filters, so that is one thing that will be done by the weekend. I have also had the under valve cover wire harness come loose, and I suppose that it is possible this could be a re-occurance of that, but symptoms aren't as severe as when that happened before.
I have also checked the turbo, no play and all fins look nice and sharp with no chips.
Also to give you more info, my truck is an 01, 7.3 with cpr fuel system, 6637 filter, otherwise stock......
Post Fiend
Joined: Feb 2006
Posts: 11,892
Likes: 2
From: Middle Tennessee
We are going to need more info. Does it do this all the time whether hot or cold? Only happen when starting from a stop? Does it do it any other time under different conditions?
I am assuming there is no SES light but perhaps it has a code. Can you have it scanned? If no one is close by, I know most small shops will scan a truck for $25-50.
I am assuming there is no SES light but perhaps it has a code. Can you have it scanned? If no one is close by, I know most small shops will scan a truck for $25-50.
Posting Guru
Joined: Nov 2006
Posts: 1,852
Likes: 1
From: house springs,mo
Trending Topics
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
Originally Posted by medhvac
have someone with a scan tool ckeck your injectors!
They do that, they will work ok at idle but then when you call on them to do some work and the worn out one won't fire.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Rezvani's Latest Post-Apocalytic 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
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
Thread Starter
|
Freshman User
Joined: Jun 2004
Posts: 42
Likes: 0
From: Glendale, AZ
well im not going to rule out an injector problem....
I paid even closer attention to the symptoms today...I only notice the shuddering in 1st and 2nd gears. My truck is an auto trans that is the notorious 4R100 tranny...does that change any ideas?
I paid even closer attention to the symptoms today...I only notice the shuddering in 1st and 2nd gears. My truck is an auto trans that is the notorious 4R100 tranny...does that change any ideas?
Post Fiend
Joined: Feb 2006
Posts: 11,892
Likes: 2
From: Middle Tennessee
Originally Posted by buddha43
well im not going to rule out an injector problem....
I paid even closer attention to the symptoms today...I only notice the shuddering in 1st and 2nd gears. My truck is an auto trans that is the notorious 4R100 tranny...does that change any ideas?
I paid even closer attention to the symptoms today...I only notice the shuddering in 1st and 2nd gears. My truck is an auto trans that is the notorious 4R100 tranny...does that change any ideas?
Doing it all the time could be an injector or harness connection problem. Just in certain gears is a mystery explained by a crappy injector that is only felt there. So go out on the interstate and get in OD locked up. Roll on the accelerator pedal and see what happens. Bring it down as low as it will go without unlocking and roll on there too. Post back.
Thread Starter
|
Freshman User
Joined: Jun 2004
Posts: 42
Likes: 0
From: Glendale, AZ
Originally Posted by Tenn01PSD350
Not really, but you never know. While you may have a diode tranny, that is not one of the symptoms. What does it do when you are in OD and locked and you try to accelerate?
Doing it all the time could be an injector or harness connection problem. Just in certain gears is a mystery explained by a crappy injector that is only felt there. So go out on the interstate and get in OD locked up. Roll on the accelerator pedal and see what happens. Bring it down as low as it will go without unlocking and roll on there too. Post back.
Doing it all the time could be an injector or harness connection problem. Just in certain gears is a mystery explained by a crappy injector that is only felt there. So go out on the interstate and get in OD locked up. Roll on the accelerator pedal and see what happens. Bring it down as low as it will go without unlocking and roll on there too. Post back.
Post Fiend
Joined: Jul 2005
Posts: 14,582
Likes: 12
From: 21791
I too would suspect a weak or faulty injector. The way these things idle it makes it hard to tell if one is partially firing, or weak, but when the engine is under a load, that one not contributing makes a difference. I suspect an electrical problem in the injector such as a weak/faulty armature, which doesnt throw a code because the injector technically receives the electrical signal and fires to ground, however the armature doesnt move the rest of the injector below it.
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
Originally Posted by strokin_it7.3
I too would suspect a weak or faulty injector. The way these things idle it makes it hard to tell if one is partially firing, or weak, but when the engine is under a load, that one not contributing makes a difference. I suspect an electrical problem in the injector such as a weak/faulty armature, which doesnt throw a code because the injector technically receives the electrical signal and fires to ground, however the armature doesnt move the rest of the injector below it.
