T444E low fuel pressure, loss of power

I’ve bought a couple of diesel engines now. Both old and used and have been lucky to not have run into the algae problem.

One of the first things I do is purchase bottle of biocide for diesel and dump that in there in case there was preexisting stuff growing.

I let it sit in the tank like that for a couple of weeks to let it do it’s thing then burn it off by driving it to empty nearly. Then I will fill it up completely and drop some off that diesel citane stuff which will clean the hell out of the injectors.

When I used the citane booster on my mini excavator diesel motor it smoked sooo insanely bad for a bit and almost ran off on me, but it also shot out a ton of crud that was caking up in the system. It didn’t do it for long but the mini excavator runs MUCH cleaner and better now. The exhaust isn’t even as smelly as the diesel output usually smells. It really runs a lot better now.

I did the same trick when I bought the 3800 T444E bus. But I only got a tiny amount of smoke with the citane boost use on that one but this engine I think was well taken care of. Didn’t seem to need to clean as much.

The citane boost stuff makes it burn hotter briefly to break up crud when ignited. If your engine is severely gunked, you’ll want to use less booster per tank and do it slowly over the course of 3-4 fill ups as to not break up too much at a time which could cause other issues with pistons etc. but I find doing this will prolong the life of your injectors if you do it once a year.

I probably used too much on my mini excavator which is why it almost ran off on me but since doing that it performs way better and starts on a dime where it would not before doing so. For me it was more beneficial on the excavator than the bus. I don’t think the bus needed it so much in my case but I’ll still every year run citane through it and if it is gonna sit toss a tad of biocide in it to prevent growth of whatever it is.
 
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ive always wondered what it was.. ive seen the nastiness of old fuel many times being involved with rescuing old busses that have sat for years.. but always wondered how algae could "grow" in oil.. I consider diesel fuel more oil than anything..

Algae in diesel is a misunderstanding. Algae requires sunlight as an energy source to grow. Tanks inside do not have this energy source as its dark inside.

What you have growing in the tank....the water in the tank can provide a place for bacteria to grow. This bacteria is feeding off the hydrocarbons (diesel). The bacteria waste is the slime that we see and can cause drivability problems. Thats the dumb version, I dont know all the exact details.

All those oil spills in the world; mother nature can clean up the oil in its raw form with due time. Its all the other crap we put in oil that makes it worse.

Its kinda amazing how the world can support life in the most strangest ways.
 
Algae in diesel is a misunderstanding. Algae requires sunlight as an energy source to grow. Tanks inside do not have this energy source as its dark inside.

What you have growing in the tank....the water in the tank can provide a place for bacteria to grow. This bacteria is feeding off the hydrocarbons (diesel). The bacteria waste is the slime that we see and can cause drivability problems. Thats the dumb version, I dont know all the exact details.

All those oil spills in the world; mother nature can clean up the oil in its raw form with due time. Its all the other crap we put in oil that makes it worse.

Its kinda amazing how the world can support life in the most strangest ways.

Agreed. Almost like we shouldn’t be meddling in climate change agendas and just let nature take its course.
 
Agreed. Almost like we shouldn’t be meddling in climate change agendas and just let nature take its course.

I will try not to get into a big political topic here.

The earth does go through natural cycles and while past historical events(like an asteroid strike) can cause a huge change like an ice age. We as humans are speeding up the earths natural cycle and maybe causing a situation the earth might not be able to repair itself fast enough.

Do I believe in global warming and cooling, yes. Scientific research has proven it more often then discounting it.

Do I believe we should be looking at ways of reducing the amount of hydrocarbons burned. Again yes. Australia has proven that you can. They are currently dealing with to much solar and now need more storage solutions.

Regardless, wind, solar, hydro generation and storage is great for housing and business power needs. We really do not need to burn hydrocarbons for electricity production.

I live in a province that produces something like 98% green energy and pay 9.5cents per kwh of energy. This is Canadian currency so do the math and would be about 7 cents US. Very reasonable in my opinion.

My opinion, oil is finite. We may have hundreds of years of supply untapped but oil is to valuable to burn, its more valuable to produce products.

For transportation; that is a different conversation which I will not get into but we need to slow down the big full on EV push.

Living in Canada we are unfortunately taxed on our carbon usage, I completely disagree with how our current government is handling its current approach.
 
I will try not to get into a big political topic here.

The earth does go through natural cycles and while past historical events(like an asteroid strike) can cause a huge change like an ice age. We as humans are speeding up the earths natural cycle and maybe causing a situation the earth might not be able to repair itself fast enough.

Do I believe in global warming and cooling, yes. Scientific research has proven it more often then discounting it.

Do I believe we should be looking at ways of reducing the amount of hydrocarbons burned. Again yes. Australia has proven that you can. They are currently dealing with to much solar and now need more storage solutions.

Regardless, wind, solar, hydro generation and storage is great for housing and business power needs. We really do not need to burn hydrocarbons for electricity production.

I live in a province that produces something like 98% green energy and pay 9.5cents per kwh of energy. This is Canadian currency so do the math and would be about 7 cents US. Very reasonable in my opinion.

My opinion, oil is finite. We may have hundreds of years of supply untapped but oil is to valuable to burn, its more valuable to produce products.

For transportation; that is a different conversation which I will not get into but we need to slow down the big full on EV push.

Living in Canada we are unfortunately taxed on our carbon usage, I completely disagree with how our current government is handling its current approach.


im all for using technology to decrease fuel usage and find many forms of energy.. (relying on one source is tunnel vision)...


but what im NOT for is the government telling me I must buy this kind of car... that I cant heat my house with whats efifcient for the weather.. (in their eyes i shouldnt be running 75 in the house.. I should be at 65 with 2 sweaters on).. when you tell me my standard of living and convenience are going to decrease im going to vote against it every time... when science shows me that my standard of living is going to go up then im all ears..


I installed the highest efficiency heat pumps built NOT because the greenies said I should.. I installed them because my comfort level went up in many weather conditions even better than the gas furnace... I installed the high efficiency gas furnace alongside the heat pumps because the high efficiency furnace also increased my comfort level over that of the old style.. to the greenies I havent gone far enough ( unless i was sitting home with a sweater on and the heat on 65 and no gas furnace)..


when CFL bulbs came out I thought they were horrid.. the first round "light bulb bans".. I bought tons of halogen and regular bulbs.. enough to run my house for many years.. I hated the cold unfeeling light which CFL's put out.. every light in my house was a warm dimmable light.. i spent a lot of time on color temperature for the best comfortable feeling light..

in that case CFL may have saved energy but they greatly decreased the comfort level.. so I resisted...


enter technology.. the tech wizards.. now we have RGBWW color changing LED's.. what replaced 90% of the halogens? RGBWW LED.. they have Increased my standard of lighting with being able to create all kinds of different feelings with light.. again let the Tech catch up.. there are still certain instances where regular bulbs do better than LED.. luckily i have some...



my point being that im not aganst green energy.. im not against lessening the use of fossil fuel.. im 100% agasnst government banning things because a group of crybabies doesnt like it..



im not convinced man has anything to do with climate change.. i am convinced climate change is real.. the earth has been in a a warming trend for milleniums and milleniums... glaciers melted long before we had diesel engines and fireplaces...
 
im all for using technology to decrease fuel usage and find many forms of energy.. (relying on one source is tunnel vision)...


but what im NOT for is the government telling me I must buy this kind of car... that I cant heat my house with whats efifcient for the weather.. (in their eyes i shouldnt be running 75 in the house.. I should be at 65 with 2 sweaters on).. when you tell me my standard of living and convenience are going to decrease im going to vote against it every time... when science shows me that my standard of living is going to go up then im all ears..


I installed the highest efficiency heat pumps built NOT because the greenies said I should.. I installed them because my comfort level went up in many weather conditions even better than the gas furnace... I installed the high efficiency gas furnace alongside the heat pumps because the high efficiency furnace also increased my comfort level over that of the old style.. to the greenies I havent gone far enough ( unless i was sitting home with a sweater on and the heat on 65 and no gas furnace)..


when CFL bulbs came out I thought they were horrid.. the first round "light bulb bans".. I bought tons of halogen and regular bulbs.. enough to run my house for many years.. I hated the cold unfeeling light which CFL's put out.. every light in my house was a warm dimmable light.. i spent a lot of time on color temperature for the best comfortable feeling light..

in that case CFL may have saved energy but they greatly decreased the comfort level.. so I resisted...


enter technology.. the tech wizards.. now we have RGBWW color changing LED's.. what replaced 90% of the halogens? RGBWW LED.. they have Increased my standard of lighting with being able to create all kinds of different feelings with light.. again let the Tech catch up.. there are still certain instances where regular bulbs do better than LED.. luckily i have some...



my point being that im not aganst green energy.. im not against lessening the use of fossil fuel.. im 100% agasnst government banning things because a group of crybabies doesnt like it..



im not convinced man has anything to do with climate change.. i am convinced climate change is real.. the earth has been in a a warming trend for milleniums and milleniums... glaciers melted long before we had diesel engines and fireplaces...

I agree.

Do whats right for you.

I also disagree with the ramming of the carbon tax down my throat trying to convince me to purchase an EV car.

I also agree that we are in a warming trend. The earth use to be warmer then it is today. I also believe we have speed up the warming process in our current situation.

Regardless, do I think we should get rid of all ICE powered vehicles and convert to electric. Absolutely not. If it's powered by fossil fuels today, I certainly believe we as people should have a choice for the next 50-100-150 years to use that vehicle as it is till society decides that fossil fuel powered transportation is obsolete. Not the government.
 
As much of a problem as “algae” can cause in a fuel system it’s surprising there isn’t more information out about it. I’ve heard of it before, it’s nothing new to me. This is the first case of it I’ve had. It seems like it isn’t something that’s brought up on a regular basis.

Anyway, I got the truck put back together today. I had a used sending unit out of one of the tractors I robbed the float off that for the truck. Fit perfect, figured there was no reason to get a new one. Had to open the end of one of the tank straps to weld on a new stud, old ones were bent and I broke them off straightening them to remove. Fuel pressure is now running around 55 at idle, and stays there at full throttle maybe climbs closer to 60. Running good so far. Would there be any benefit to change the regulator spring out for the 72 psi one?
 
As much of a problem as “algae” can cause in a fuel system it’s surprising there isn’t more information out about it. I’ve heard of it before, it’s nothing new to me. This is the first case of it I’ve had. It seems like it isn’t something that’s brought up on a regular basis.

Anyway, I got the truck put back together today. I had a used sending unit out of one of the tractors I robbed the float off that for the truck. Fit perfect, figured there was no reason to get a new one. Had to open the end of one of the tank straps to weld on a new stud, old ones were bent and I broke them off straightening them to remove. Fuel pressure is now running around 55 at idle, and stays there at full throttle maybe climbs closer to 60. Running good so far. Would there be any benefit to change the regulator spring out for the 72 psi one?


if i remember right the only thing mebtionbed in the TSB was for the idle knock.. during hot sliow idle it would sound errily similar to a rod knock but was apparently the plunger on the #8 injector bottomin g out as it fires right after the adjacent #6 cylinder.. so they surmised raisingthe rail pressure would help.. it seemed to help on mine.. but not all of them.. as a year or 2 later they released a special injector for the #8 cylinder which apparently held more fuel



I always thought i could fee la slight difference in my engine after the spring change.. no idea if it was real or the placebo effect of me turning up the fuel PSI so the bus must be faster...



on paper technically you could gain a little simply becase the #8 cylinder would be getting a chance to fuel fully vs bottom out .. its literally a 5 minute fix.. i got my kit from IH butthere are all kinds of things on the internet about shimming or changing the spring on the 7.3.
 
When this problem first arised a year ago I tried finding washers to shim the spring. Didn’t have any luck getting any that small. Will a spring for a 7.3 PowerStroke fit the T444E? In theory the injector would probably wear less with more pressure since it can’t bottom out? I don’t notice the knocking sound at hot idle.
 
When this problem first arised a year ago I tried finding washers to shim the spring. Didn’t have any luck getting any that small. Will a spring for a 7.3 PowerStroke fit the T444E? In theory the injector would probably wear less with more pressure since it can’t bottom out? I don’t notice the knocking sound at hot idle.

I know us Ford OBS guys including myself would take a 3/16 BB and add to the spring and put us in the ball park of 70-75psi. I used a fluid filled pressure gauge to see a clean reading.

Apparently it was suppose to improve idle quality and make the truck more "snappy" when accelerating.

If I remember my truck was a little over 60 and when I added the BB the pressure bumped to 76-77 psi. I ran it for a few years. Then I removed it one day for some reason and frankly did not notice any difference after removal worthy of installing it back in.

All that being said my truck still has stock single shot injectors and do not flow much. Might work better if I was running larger injectors.

Just went back to your OP. You are running single shots and your pressure is a little low. You could purchase a spring. Not sure if the Ford one would fit. You may need to google image it and see if you have cross references.
 
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I know us Ford OBS guys including myself would take a 3/16 BB and add to the spring and put us in the ball park of 70-75psi. I used a fluid filled pressure gauge to see a clean reading.

Apparently it was suppose to improve idle quality and make the truck more "snappy" when accelerating.

If I remember my truck was a little over 60 and when I added the BB the pressure bumped to 76-77 psi. I ran it for a few years. Then I removed it one day for some reason and frankly did not notice any difference after removal worthy of installing it back in.

All that being said my truck still has stock single shot injectors and do not flow much. Might work better if I was running larger injectors.

Just went back to your OP. You are running single shots and your pressure is a little low. You could purchase a spring. Not sure if the Ford one would fit. You may need to google image it and see if you have cross references.


my T444E was running about 47 (normal according to the book) before the spring change.. split shot injectors.. it seemed like a lot of things were different from IH to ford in the various years.. of course ford went to E-fuel after the SD came out whereas IH stayed with mechanical fuel all the way through. so it may have been only an issue with split shots and the mechanical pump which ford never had.. ford was E fuel when they started split shots.. (never can rememebr if split shots were an early 99 or late 99 thing in the fords)..
 
my T444E was running about 47 (normal according to the book) before the spring change.. split shot injectors.. it seemed like a lot of things were different from IH to ford in the various years.. of course ford went to E-fuel after the SD came out whereas IH stayed with mechanical fuel all the way through. so it may have been only an issue with split shots and the mechanical pump which ford never had.. ford was E fuel when they started split shots.. (never can rememebr if split shots were an early 99 or late 99 thing in the fords)..

I thought split shots started in all super duties when introduced in 99 and in 96 or 97 on the OBS Ford's when purchased in California. I cannot remember.

One of the other reasons why I stopped using the BB was because I recall coming across the working pressure of the fuel filter and I think it was 75 psi so I was a little passed it.
 
That being the case I will just leave the spring that I have in there. It doesn’t seem to me that there is a problem that needs correcting to justify messing with it. As far as I know this still has the stock injectors, I haven’t been under the valve covers to know for sure though.
 
That being the case I will just leave the spring that I have in there. It doesn’t seem to me that there is a problem that needs correcting to justify messing with it. As far as I know this still has the stock injectors, I haven’t been under the valve covers to know for sure though.

I mean it would not hurt as yours is a little lower then mine was. I imagine the spring could be getting weak. Maybe check it again with all this cleaning you have done.

I just don't think it is your problem but who knows, maybe the issue persists......it's worth looking into. From the sounds of things, your tank for sure needed a cleaning.
 
Yes for sure didn’t hurt, I do think the pump was getting a bit weak. I can check pressures again, I checked yesterday before driving and was sitting at 55 idle and wide open.
 
Yes for sure didn’t hurt, I do think the pump was getting a bit weak. I can check pressures again, I checked yesterday before driving and was sitting at 55 idle and wide open.

If it's 55 psi at idle and wot. I don't think you have much to gain.

I remember reading the 6.0 powerstroke guys found on dyno runs that anything over 65 psi they would loose power. My 6.0 has the blue spring update. Never checked the pressure after installing it. Either way, off topic and different engine

Hope yours runs good now.
 
So far it’s running perfect, thanks for the help. Going to need to address the clutch one of these days… starting to slip at times.
 
Around 1” it had almost none when we got it about 10 years ago now. Only place I have found to adjust it is the linkage. Nothing on the pressure plate
 

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