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7.3L IDI Diesels (Not Power Strokes) Technical discussion of topics related to vehicles powered by the 7.3 Liter In-Direct Injection Navistar engines.

       
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Old 10-22-2005, 12:44 AM   #1 (permalink)
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7.3 non turbo blue smoke/ add a turbo?

I have an 88 F350 Utility body truck with a 7.3 non turbo with 158,000 miles. First of all the truck smokes blue/ white smoke really bad sometimes upon cold start until it warms up. What seems to be the problem? Also I just changed my oil and filter and it has really low oil pressure- What should I fix? Last- Am I able to add a turbo to this truck? Who makes it? Do I have to change internals in the motor or fuel pump? Computer? Who makes power upgrades for it?
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Old 10-22-2005, 12:09 PM   #2 (permalink)
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Re: 7.3 non turbo blue smoke/ add a turbo?

Welcome to the site? How long does it smoke and how long is the wait to start light on? Does it idle faster when cold? Do you have a mechanical oil pressure guage or just stock? Yes, you can turbo, ATS, Banks, Hypermax. No internal changes, you will have to turn up the pump for more power.
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93 F250, regular cab, 4x4, 7.3 NA, ZF5, 3.55, 209k miles, came home 2/28/06, soon to be turbo.
92 250, regular cab, 4x4, 7.3 NA, E4OD, 3.55, 316k miles, came home 8/28/04, aluminium 16x7 wheels, 285/75/16 Sport King AT.
89 250, extended cab, 4x4, 7.3, ATS wastegated, 5" straight pipe, hand shaker, 4.10, slightly toasted, waiting for a new cab and front end, came home 12/24/04
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Old 10-22-2005, 12:24 PM   #3 (permalink)
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Re: 7.3 non turbo blue smoke/ add a turbo?

[ QUOTE ]
Computer? Who makes power upgrades for it?


[/ QUOTE ]

No computer on these trucks so no power upgrades except turbo and or propane.
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1991 Ford PL Custom Ambulance Type III 7.3L Diesel. Photo Here Pioneer AM/FM/XM/CD Stereo. Code 3 lightbar, Whelen Strobes and flasher lights. Whelen flood lights on front, rear and sides. There bright enough to turn darkness into daylight. Siren with several tones plus electronic airhorn and PA. Custom 3" exhaust from manifolds back with a Gibson Superflow Muffler [img]/ubbthreads/images/graemlins/grin.gif[/img]. Dual alternators and dual sets of batteries. If I need a jumpstart all I do is push a button. On spot tire chains that install and de-install themselves at the flip of a switch. Also has air compressor on board along with suction unit and O2 system.

1972 Cadillac Hightop Ambulance by Superior Lucky if I get 10MPG
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Old 10-22-2005, 12:27 PM   #4 (permalink)
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Re: 7.3 non turbo blue smoke/ add a turbo?

It smokes just until it warms up so after a freeway trip or so but it still smokes a little at idle throughout the day. The wait to start light stays on for about 30 to 45 seconds.YES it idles around 1500 to 2000 RPM when cold upon start. I have just the stock in dash oil guage. Do you know around how much for a turbo kit?
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Old 10-22-2005, 05:11 PM   #5 (permalink)
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Re: 7.3 non turbo blue smoke/ add a turbo?

Are you sure the wts light is on for 30-45 sec., it should only be on for around 15 sec. Your cold idle is also way high, i'm not positive but i think it should be 900-1000 rpm. What is the warm idle rpm? there is a cold idle adjustment on the ip, turn it in to turn down, it a little selinoid that pushes on the throttle shaft. I'm thinking you have a fuel problem somewhere, ip, injector, timing, or leak. The stock oil pressure gauge is an on/off switch. If you want to know what your oil pressure is put a real gauge on. I think the going prices for a new turbo system is in the 2000-2500 range. What tranny do you have, can you put that in your sig.
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93 F250, regular cab, 4x4, 7.3 NA, ZF5, 3.55, 209k miles, came home 2/28/06, soon to be turbo.
92 250, regular cab, 4x4, 7.3 NA, E4OD, 3.55, 316k miles, came home 8/28/04, aluminium 16x7 wheels, 285/75/16 Sport King AT.
89 250, extended cab, 4x4, 7.3, ATS wastegated, 5" straight pipe, hand shaker, 4.10, slightly toasted, waiting for a new cab and front end, came home 12/24/04
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