Very little power???
Thread Starter
|
New User
Joined: Jul 2009
Posts: 5
Likes: 0
Very little power???
I have 93 f250 and all of a sudden its started lacking power. It started with a rough idle and the throttle being hard to push almost like a real tight spring. It would then go back to normal after warming up, however as soon as I shut it off and started it back up it would do it again. After a few drives like that it just stayed in that mode with very little acceleration or top end. I went ahead and put a new filter on and that did nothing. I tried running 2 cans of sea foam through the the new filter by taking the lift pump hose off and sucking it through that way. Then I couldn't even get it started, so I put a new lift pump on and got it running, but still no power hardly and it will die if revved up at all and then let to idle. If i am careful I can ease down the RPM's and get it to idle nice and smooth.
Any thoughts? Is it worth trying to run a different conditioner through the filter?
Any thoughts? Is it worth trying to run a different conditioner through the filter?
Methanoholic
Joined: Mar 2009
Posts: 6,442
Likes: 8
From: Maine (NorCal Native)
It's easier to pull the fuel filter, empty it and fill it with your preferred Diesel Fuel Injection Cleaner and Lubricator.
After you do that, start the motor for 30 to 60 seconds and shut off, let set for a half hour or more, basically the longer the better within reason, Start it up and run it hard.
Though I suspect you IP is bad and Cleaners, Lubricators are not going to help.
-Enjoy
fh : )_~
After you do that, start the motor for 30 to 60 seconds and shut off, let set for a half hour or more, basically the longer the better within reason, Start it up and run it hard.
Though I suspect you IP is bad and Cleaners, Lubricators are not going to help.
-Enjoy
fh : )_~
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 16
From: Nutter Fort, WV
abnkeis,
Welcome to FTE and the IDI diesel forum.
It sounds like something in the govenor is stuck or binding.
If you fill the filter with Diesel Kleen or some other cleaner/lubricant, the start the engine for 30 seconds and turn it off.
Now let the cleaner sit in the IP for a couple hours.
You may get lucky and it may break the stuck linkage loose.
If not, it does sound like an IP replacement is in order.
How many miles on this IP?
Welcome to FTE and the IDI diesel forum.
It sounds like something in the govenor is stuck or binding.
If you fill the filter with Diesel Kleen or some other cleaner/lubricant, the start the engine for 30 seconds and turn it off.
Now let the cleaner sit in the IP for a couple hours.
You may get lucky and it may break the stuck linkage loose.
If not, it does sound like an IP replacement is in order.
How many miles on this IP?
Thread Starter
|
New User
Joined: Jul 2009
Posts: 5
Likes: 0
Thank for the welcome!
Filling the filter with Diesel Kleen was what I did tonight, and it ran for about 30 seconds when I was about to shut it off and it died. I have not been able to get it to start back up yet. I've tried on and off through out the evening.
The truck has 170k miles, I've had it for about 3 years and less than 10k put on. This is the first real issue I have had.
Filling the filter with Diesel Kleen was what I did tonight, and it ran for about 30 seconds when I was about to shut it off and it died. I have not been able to get it to start back up yet. I've tried on and off through out the evening.
The truck has 170k miles, I've had it for about 3 years and less than 10k put on. This is the first real issue I have had.
Methanoholic
Joined: Mar 2009
Posts: 6,442
Likes: 8
From: Maine (NorCal Native)
There is air in the system, why is the Q, did you fill the filter completely full?
Do you get good flow and pressure out of the schrader valve?
One things for sure ... It's sat in Diesel Kleen long enough...
-Enjoy
fh : )_~
Do you get good flow and pressure out of the schrader valve?
One things for sure ... It's sat in Diesel Kleen long enough...
-Enjoy
fh : )_~
Thread Starter
|
New User
Joined: Jul 2009
Posts: 5
Likes: 0
The filter was filled clear up, but the last couple times I have pulled it off it has only been half full.
I only had a digital tire gauge to read the pressure at the schrader vavle at was getting 2.5, so I replaced the lift pump, but still getting about the same reading. I seemed to get a little under a pint in 10 seconds of cranking, but it wasn't a real accurate collection.
I was wondering if it could be the line coming from the tank, but wouldn't think so if filling the filter with Diesel Kleen would make it go from running to not running.
I only had a digital tire gauge to read the pressure at the schrader vavle at was getting 2.5, so I replaced the lift pump, but still getting about the same reading. I seemed to get a little under a pint in 10 seconds of cranking, but it wasn't a real accurate collection.
I was wondering if it could be the line coming from the tank, but wouldn't think so if filling the filter with Diesel Kleen would make it go from running to not running.
Trending Topics
Methanoholic
Joined: Mar 2009
Posts: 6,442
Likes: 8
From: Maine (NorCal Native)
Half full filter means you are getting air someplace.
When you did the flow test out the schrader valve was the fuel Aerated?
That would indicate that the lift pump is sucking air on the suction side. (lines to the tank)
You should get 1/3 pint in 10 seconds of cranking and about 6 lbs.
However I suspect your pressure test with the tire gauge is flawed.
-Enjoy
fh : )_~
When you did the flow test out the schrader valve was the fuel Aerated?
That would indicate that the lift pump is sucking air on the suction side. (lines to the tank)
You should get 1/3 pint in 10 seconds of cranking and about 6 lbs.
However I suspect your pressure test with the tire gauge is flawed.
-Enjoy
fh : )_~
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 6 Best Deals Available on New Fords & Lincolns Right Now
Brett Foote
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Verdad Gallardo
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
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
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 16
From: Nutter Fort, WV
If you filled the filter all the way up, then ran the engine and it stalled 30 seconds later with the filter only 1/2 full you may be sucking air somewhere in the supply line.
Normally the line is metal from the tank selector valve toward the engine.
Inspect the line under and near any clamps for rust.
You may or may not see a fuel stain at the problem area depending on how advanced the rust damage is.
Also some people have trouble with the O rings in the fuel line to sending unit connections and the tank selector valve connections.
Does it do the same thing on either tank?
Normally the line is metal from the tank selector valve toward the engine.
Inspect the line under and near any clamps for rust.
You may or may not see a fuel stain at the problem area depending on how advanced the rust damage is.
Also some people have trouble with the O rings in the fuel line to sending unit connections and the tank selector valve connections.
Does it do the same thing on either tank?
Thread Starter
|
New User
Joined: Jul 2009
Posts: 5
Likes: 0
Well I am finally getting back to my truck now that I got a few other projects out of the way.
The last checks I did to my truck was to crack an injector line and I was barely getting any fuel out, so I checked the filter and this time it was full. I may have had an air leak, because I did had a few connections that were a little loose, but after tightening them up it still was acting the same and not starting.
A pressure test with a real gauge this time at the filter read the proper psi.
So...I have since went ahead and bought a rebuilt injection pump and injectors, hoping that is it and probably needing it anyways. However my question now is... I am wondering how much pressure it should take to blow through the return line at the back of the engine. I plugged one of the return lines off the tee and blew through other back to the tank. It took all I had (lung capacity) to get air through the line and then I could just barely keep it flowing. Is this normal or should it be easier? It does have a full tank too. I just thought I would check before I get everything else on and find out that is part of the problem.
Thanks for the help!!!
The last checks I did to my truck was to crack an injector line and I was barely getting any fuel out, so I checked the filter and this time it was full. I may have had an air leak, because I did had a few connections that were a little loose, but after tightening them up it still was acting the same and not starting.
A pressure test with a real gauge this time at the filter read the proper psi.
So...I have since went ahead and bought a rebuilt injection pump and injectors, hoping that is it and probably needing it anyways. However my question now is... I am wondering how much pressure it should take to blow through the return line at the back of the engine. I plugged one of the return lines off the tee and blew through other back to the tank. It took all I had (lung capacity) to get air through the line and then I could just barely keep it flowing. Is this normal or should it be easier? It does have a full tank too. I just thought I would check before I get everything else on and find out that is part of the problem.
Thanks for the help!!!
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 16
From: Nutter Fort, WV
Take the fuel cap off, it shoulds be easier to blow in the line then.
Tank vents have a roll over check valve in them, air in, not out.
Injection pump, injectors and the return line kit, you should be rolling for several more years with no problems now.
Tank vents have a roll over check valve in them, air in, not out.
Injection pump, injectors and the return line kit, you should be rolling for several more years with no problems now.