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| 1999 to 2003 7.3L Power Stroke Diesel 7.3L Power Stroke Diesel equipped Super Duty and Excursion. |
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#1
Fri, July 15th, 2011, 08:04 PM
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Ok finally pulled my injector Rosewood diesel will inspect my injector even though my warranty is up. While everything is open what do I need to look for. What am I looking for in the cups etc. I started the truck up with the valve covers off and there was good blowby that I could see. What is expectable etc. Anyone have a video?
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#2
Fri, July 15th, 2011, 09:50 PM
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Acceptable is when you can remove the oil fill cap and you don't see individual "puffs" of crankcase vapors.
The pressure of the vapors should not be enough to lift the cap off of the filler tube when placed upside down. It may vibrate off of the filler tube, but it shouldn't be blown off.
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Tuning, PCM flashing, and burning chips for 7.3s since 2008. Repairing all aspects of 7.3L Powerstrokes for 25 years. Eight 7.3L PSDs in the driveway including a 1994 Crown Vic and 1973 F100/2002 F350. Looking for the next victim.
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#3
Fri, July 15th, 2011, 11:15 PM
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Ok then its fine what am I looking for in the injector holes?
I spoke to Rosewood he thinks its the tuning but will check the injectors for me
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#4
Mon, July 18th, 2011, 08:09 AM
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And what is there is enough pressure to lift the cap? I was at the dealer a couple of months ago to do the brake sensor recall and I asked him (the diesel tech) about my idle. He said it was from cylinder wear due to a "bad" filter (AFE). He then pulled my oil fill cap off and showed me the crank case vapors...it looked enough to lift the cap but I haven't tried..yet.
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01 F350 7.3 4x4 CC SRW/3.73/315-75-16/Aeroforce Interceptor/BD Thruster II/ Bellowed Up-Pipes/4" turbo back exhaust/CCV Mod/DIY 6637/FPR Shimmed to 65 PSI/TS chip reburned with PHP tunes (Stock, 40T WITH Whsiper tune, 80DD, 100R, 140Ex, 140SS)/Replaced and Cleaned EBPS & Tube 4-6-12/Zoodad mod/Recon smoked cab lights/MM Hubs/Cowl Hood/HPx
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#5
Mon, July 18th, 2011, 01:19 PM
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There is ALWAYS going to be some amount of blowby. That's what PCV and Crankcase Vents are for. The concern is not necessarily how much blowby you are getting (of course there can be too much), but whether or not it is a smooth stream (like blowing through a straw) or coming out in puffs (like making a motorboat sound with your lips). Uneven blowby indicates unusual wear (or worse, piston/ring damage) on a particular cylinder. This would also be evidenced by a compression test, but this is the poor man's way to identify possible engine problems.
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Bill Cohron - The Mad Doctor   Power Hungry Performance - The ORIGINAL in Ford performance tuning... Since 1997! (678) 890-1110 www.gopowerhungry.com - Home of the Hydra Chip, Minotaur Tuning Software, and the new Orion Reflash System for Navistar! Bring back  Windows™ XP and 7.  Windows™ Vista and Windows™ 8 is a pain in my a$$!  Windows™ 10 is only slightly less annoying!  Windows™ 11 is garbage!  Much to my surprise, I'm actually quite enjoying Linux! 
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#6
Mon, July 18th, 2011, 08:02 PM
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That's my kind of diagnoses
 My blowby was even. I always thought the idle of a 7.3 with a good bit of cylinder wear would be like my 96 250k with 650k mi. It idles up and down in a uniform fashion. My truck now has a random hick-up...mainly after its warm. I've read where a lot of other guys on the forums saying they fixed the same issue by finding and fixing bad injectors o-rings. And unless it becomes a must to fix, I'm gonna wait it out until I replace the injectors. Thanks Bill, good to hear you
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01 F350 7.3 4x4 CC SRW/3.73/315-75-16/Aeroforce Interceptor/BD Thruster II/ Bellowed Up-Pipes/4" turbo back exhaust/CCV Mod/DIY 6637/FPR Shimmed to 65 PSI/TS chip reburned with PHP tunes (Stock, 40T WITH Whsiper tune, 80DD, 100R, 140Ex, 140SS)/Replaced and Cleaned EBPS & Tube 4-6-12/Zoodad mod/Recon smoked cab lights/MM Hubs/Cowl Hood/HPx
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#7
Mon, July 25th, 2011, 09:13 PM
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I talked to Mr Rosewood and he straighted that my injectors tested out completely fine. Bill I was hoping you could tweek with my tunes and see if we could fix my idle issue. The injectors are out what should I look for in the hole? Bill I have a video of the idle if you need it.
Thanks Eric
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