General DieselDiscussion about diesels in general. All brands are welcome, please refrain from brand wars. Discussions about types of diesel fuel also go here.
Hey Guys - Hoping some of you can give me some insight to power problems I am having with an Int. 4700 with a T444e and an Allison auto tranny. Here goes:
Pulling a 42 foot goosneck horse trailer, I am seeing a severe loss in power on grades. For comparison, pulling the same trailer with the same load on the same grade, my 1 ton dually (brand omitted for my safety,lol) pulls the grade at 60 mph with very little rise in temps. My International drops to a screaming 21 mph, foot on the floor, with Exh gas rising to 1100 or so. The local Int. dealer took 102 of my dollars and then told me in was low turbo boost pressure due to engine wear. The truck is a 95 model but only 120k miles, I would hope the 7.3 is good for more than that. According to the dealers computer, boost pressure was .9 psi at idle out of gear, with a max pressure of 13.8 climbing a slight grade at 65mph foot on floor. I want to know if these pressures are indeed low and if so what are my options for correction. Any feedback you can give me will be appreciated. I like the truck and want to keep it but, when people waive at me on the interstate, I prefer they use all five fingers.
thanks
Check and see if you have any boost leaks, either from your up-pipes and after the turbo (and intercooler if applicable). Also, it could be a bad map sensor. Oh, and Welcome to TDS!!
P.S. this will probably get moved to another forum.
__________________
...John...
1994.5 powerstroke F-350 Reg. Cab. 5 Speed 2WD DRW 4.10, Oxford White, Cab and Chassis converted to electric over hydraulic dump bed. Diy Aic, switched 10k mod, Diy exhaust brake, Autometer Boost and Pyro gauges. DIY tymar. 3" downpipe. No exhaust after downpipe Dp-tuner F5, No Start, Stock, 40 Tow, 80 Eco
my 2 cents
gearing?
has it alyways done this? if so gearing if not turbo
any other changes in it?
a 4700 with a 42"gn should be no problem at all is the tranny shifting right?
__________________
88 F-250 body,550 rear frame setup, 7.3 idi, back up camera, class 5 bumper hitch welded to frame and gusseted, front mount hitch and off road lights,93 front clip, headache rack, 37" humvee tires, ac power converter,factory buckets from quadcab, power windows and locks,cobra 29 cb w/ 102" whip, high lift jack behind seat, toolbox for the junk, visor, running lights, huge front bumper, oba,
in progress western style mirrors, holset turbo, airhorns, and some other goodies
Guys,
I have only had the truck since July but has been this way since I got it (it came with the trailer,long story)
Tranny seems fine and gearing I believe is ok - 60 mph at 2200 rpm, maxs out at 72 mph and 2700. From what I have read elsewere, I agree with boost leaks as a possible, I am in the process of checking the system for such leaks, but I would like to know what the actual boost pressure is suppose to be, the dealer is saying its down some 40 percent.
Stock on our trucks, not sure about the T444E specs, boost pressure is right around 15.5 psi. Of course, wear has an effect on this, but I would suspect boost leaks.
__________________
...John...
1994.5 powerstroke F-350 Reg. Cab. 5 Speed 2WD DRW 4.10, Oxford White, Cab and Chassis converted to electric over hydraulic dump bed. Diy Aic, switched 10k mod, Diy exhaust brake, Autometer Boost and Pyro gauges. DIY tymar. 3" downpipe. No exhaust after downpipe Dp-tuner F5, No Start, Stock, 40 Tow, 80 Eco
John -
I have been researching this for several hours today and around 15 at WOT is what I have found. My truck showed 13.8 max, I can see where 1 to 2 psi could be leaks and normal wear but, the dealer was trying to tell me 22 or so was normal. I'm just trying to decide if the truck is worth keeping. I like having the extra GVW for this trailer but, the lack of power is driving me nuts!
Another thing to check for while you're in there is exhaust leaks around the turbo feed pipes and turbo housing. I've seen school bus type applications where this caused a noticable drop in power.
__________________
For every action there is an equal and opposite malfunction
1988 F350 CC 4x4 SRW, 7.3 Banks non-wastegated turbo, C6 w/ HD torque converter, Tru-Cool 4590 trans cooler, Highjacker 'softride' 4" lift, pre/post luber, coolant filter, Racor fuel filter/separator, pyro and boost gauges, Progressive 16x8 wheels, 285-75x16 rubber, 3" downpipe into 4" straight pipe over the rear axle and into 5" SS tip. 1994 Alpenlite 33' 5th wheel trailer
i think its leaks too but... idk much about the turbos
anything do the tank leak test
spray bottle soapy water on it and watch it bubble
__________________
88 F-250 body,550 rear frame setup, 7.3 idi, back up camera, class 5 bumper hitch welded to frame and gusseted, front mount hitch and off road lights,93 front clip, headache rack, 37" humvee tires, ac power converter,factory buckets from quadcab, power windows and locks,cobra 29 cb w/ 102" whip, high lift jack behind seat, toolbox for the junk, visor, running lights, huge front bumper, oba,
in progress western style mirrors, holset turbo, airhorns, and some other goodies
I beg your pardon but, it is not a PSD. If you read above it is a 7.3 in an International 4700 truck. They put PSD's only in Ford vehicles as far as I know.
Given that this forum title reads: "Technical discussion of topics related to <u>vehicles</u> powered by the 7.3 Liter In-Direct Injection Navistar engines"
This seemed to be the most likely place to ask my question.
If this thread is in the wrong forum, I am sure one the mods will be more than willing to move it.
From what I understand, Sign_man is correct, a T444E is basically an un-branded Power Stroke. The "T" is for turbo, "444" is for cubic inch, and "E" is for electronic, or at least that is what I always understood.
__________________
'88 F-250 7.3 IDI N/A, 4x4, ZF-5, 3.54, 285/75/R16 All Terrains, bowl removed, dual 2" custom exhaust with glasspacks (very unique sound)
'93 F-250 7.3 IDI N/A, future project
'88 F-250 7.3 IDI N/A, **spare parts**
'92 F-350 7.3 IDI ATS Turbo, 4x4, 4-door, ZF-5, 3.73, turned up pump, ISSPRO gauges, 6" I-beam bumpers, 35" Buckshot Mudders, custom 4" straight exhaust
'89 Bronco - future 7.3 conversion
You have been misinformed. In T444E the "E" is for electronic. IDI's ceased production in 1994 being replaced by the powerstroke aka T444E in both Ford and International trucks. Yours is a 1995, well into powerstroke production. There are some minor differences based on the application such as the starter, oil pan, and fuel filter mount, but it is a wholly different animal than the 7.3 Indirect injection engine.
---------------
From Wikipedia, the free encyclopedia
Navistar T444E
Manufacturer Navistar
Also called: Power Stroke
Production: 1994–2003
Successor: Navistar VT365
The T444E is a Diesel V8 engine manufactured by Navistar International Corporation. It was used by Ford Motor Company, branded the Ford Power Stroke engine, from 1994 through 2003, replacing an earlier 7.3 L indirect-injection V8 from Navistar. It was replaced in 2003.5 (After December 31st 2002) by the 6.0 L T365.
----------------
Turbo boost levels for a T444E are much higher than the IDI's referenced here.
With so few miles, the only thing I can think of is a dusted engine. If the air filter isn't seated properly and doesn't seal, dust and debris erodes the blades in the turbo pretty quickly. Usually the rings are gone by the time performance suffers. It's easy enough to check for, just remove the air filter and see if the intake tract is dusty looking.
Back to the OP's question. Check your fuel filter and possibly replace, also, (going on PSD knowledge here,) check to see if you Fuel Pressure Regulator Screen is clean and not clogged. lack of Fuel will cause a lack of boost! Good luck!
__________________
...John...
1994.5 powerstroke F-350 Reg. Cab. 5 Speed 2WD DRW 4.10, Oxford White, Cab and Chassis converted to electric over hydraulic dump bed. Diy Aic, switched 10k mod, Diy exhaust brake, Autometer Boost and Pyro gauges. DIY tymar. 3" downpipe. No exhaust after downpipe Dp-tuner F5, No Start, Stock, 40 Tow, 80 Eco
John - The fuel filter has less than a 1000 miles on it and I put a new screen in it yesterday. I did find one exhaust leak at the turbo but it will be this weekend before I can put enough load on the engine to see if it makes a difference. Thanks for your help.
Now for Sign_man : All PSD engines start life on the Navistar assembly line set up just for Ford in Schamburg, Ill. All International Truck engines are manufactured on a completely seperate line under a different set of specs, this is a contractual requirement with Ford. International truck engines have never have been and I doubt ever will be labeled a PSD.
My engine is no more an unbranded Power Stroke, than an Isuzu is an unbranded Duramax or a Cummins is an........well they still call them Cummins.
Hmmm...Does the motor run smooth on the flats? Could possibly be injector issues? Under Valve Cover Harnesses for example, but, If the truck starts fine and runs smooth, then that probably isn't it. Also, check your fuel pressure, If there are no boost leaks, then the fuel pump might be getting weak on you. If your truck is the same as mine, then you have a schrader valve fitting on the side of the FPR where you can check pressure. You might try and rig up a temporary remote mount gauge with some hydraulic hose and fittings. IIRC, fuel pressure at WOT should be around 65-75psi. Good luck and let us know how it goes! We'll get it figured out! TDS hasn't let me down yet!
__________________
...John...
1994.5 powerstroke F-350 Reg. Cab. 5 Speed 2WD DRW 4.10, Oxford White, Cab and Chassis converted to electric over hydraulic dump bed. Diy Aic, switched 10k mod, Diy exhaust brake, Autometer Boost and Pyro gauges. DIY tymar. 3" downpipe. No exhaust after downpipe Dp-tuner F5, No Start, Stock, 40 Tow, 80 Eco
The AutoGuide.com network consists of the largest network of enthusiast-owned enthusiast-operated automotive communities.
AutoGuide.com provides the latest car reviews, auto show coverage, new car prices, and automotive news. The AutoGuide network operates more than 100 automotive forums where our users consult peers for shopping information and advice, and share opinions as a community.
Linear Mode
