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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, March 12th, 2010, 07:01 PM
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I may have found my loss of power (WITH PICS)
I still really need help, so thanks for all I've gotten and will get. I didn't mention this earlier because I was waiting until I could get home and snap a few pics, but I noticed what looks like a missing bolt on the intake plenum. See pics here:
The pics are progressively zooming in    I hope you can see in the pics what bolt I'm talking about. And if I am correct, I would think this bolt would definitely hold in some sort of pressure, especially under heavy loads. Please let me know what y'all think. If that is a missing bolt, does anyone know what size and thread the bolt is that I need to get to replace it??? Thanks.
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Bob- 2003 F250 Lariat 7.3PSD CC SB FX4 Kwik (6637) Filter, RE 2.5" leveling kit, F350 Rear Blocks, TC Lock, Fumoto, EBPV/Exhaust Brake,6.0 Tranny Cooler, AIH Delete, IssPro EV2 Gauges, PHP Phoenix stock, 25tow, 40tow, 65tow, 80dd, 100perf, In-tank mods, Muffler Delete, WW, FRx,HPx, JW Stage 1 Trans, Swamps HV/HF IDM -Pulling a 38' Forest River Sierra 5th Wheel 
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#2
Fri, March 12th, 2010, 07:39 PM
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Bob, I can send you the bolt (I have a ton of extras) but being that I have removed quite a few of those, I can say with near absolute certainty that the sealant that holds those plenums on is nearly bulletproof and a leak there would be REALLY wet with oil....not just a bit damp and dirty like yours is. In addition, the bolt hole is a "blind" hole which means that it doesn't go through the casting into a place where it will leak through the bolt hole.
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Tuning, flashing, burning chips, and repairing all aspects of 7.3L Powerstrokes. SEVEN 7.3L-powered vehicles in the driveway. Two didn't come that way from the factory!
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#3
Fri, March 12th, 2010, 07:52 PM
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Cody, what if I was to tell you that even though there isn't much oil right there, I do have quite a bit of oil in the valley and all over the backside of the engine, and it's new, since the last couple of weeks.
I was actually trying to figure out where that was coming from, too, but haven't had any luck yet. Iisnt it possible that all these things are connected? Increased noise, loss of power under load, everything sprayed with oil, and now this missing bolt????
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Bob- 2003 F250 Lariat 7.3PSD CC SB FX4 Kwik (6637) Filter, RE 2.5" leveling kit, F350 Rear Blocks, TC Lock, Fumoto, EBPV/Exhaust Brake,6.0 Tranny Cooler, AIH Delete, IssPro EV2 Gauges, PHP Phoenix stock, 25tow, 40tow, 65tow, 80dd, 100perf, In-tank mods, Muffler Delete, WW, FRx,HPx, JW Stage 1 Trans, Swamps HV/HF IDM -Pulling a 38' Forest River Sierra 5th Wheel
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#4
Fri, March 12th, 2010, 07:54 PM
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I suppose it's possible....as is anything. I am a bit concerned about just sticking a bolt in it and hoping that the silicone actually seals it up again. Once the cured silicone is ripped apart, it's no good. You can try it though!
I'll send you a bolt (you may have to send me your address again  ) but I can ship it Monday.On edit: The oil that I'm noticing in the pictures is pretty common of loose clamps on the orange hoses from the "y" into the plenum. I've fixed a couple "rear main seal leaks" just by tightening those clamps.
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Tuning, flashing, burning chips, and repairing all aspects of 7.3L Powerstrokes. SEVEN 7.3L-powered vehicles in the driveway. Two didn't come that way from the factory!
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#5
Fri, March 12th, 2010, 08:06 PM
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Thanks for all the help Cody. Really, if you can just tell me the particulars of the bolt then I will just go to the autoparts store and get one. They should have it, right?
I will recheck the clamp on the orange boots tomorrow. Thanks again.
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Bob- 2003 F250 Lariat 7.3PSD CC SB FX4 Kwik (6637) Filter, RE 2.5" leveling kit, F350 Rear Blocks, TC Lock, Fumoto, EBPV/Exhaust Brake,6.0 Tranny Cooler, AIH Delete, IssPro EV2 Gauges, PHP Phoenix stock, 25tow, 40tow, 65tow, 80dd, 100perf, In-tank mods, Muffler Delete, WW, FRx,HPx, JW Stage 1 Trans, Swamps HV/HF IDM -Pulling a 38' Forest River Sierra 5th Wheel
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#6
Fri, March 12th, 2010, 09:44 PM
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The bolt is a 8mmX 1.25 and is 5/8 long.
The bolt that was suppose to be in there looks like this.  IIRC it was for the ground wire that went to your AIH. On edit it looks like the ground wire is still there but it doesn't look like it is hooked up.....or is it? Sorry but I am with Cody on this one.
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