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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 12-29-2007, 04:47 PM   #1 (permalink)
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thudding?

engine makes a thudding sound its a thud if you think of thud thats it what could this be and how do i fix this?

thanks tom
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http://youtube.com/watch?v=ILAQuHNAGE0

i plan to add propane kit, stake body bed, gn hitch,western style mirrors, and a lot more
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Old 12-29-2007, 04:52 PM   #2 (permalink)
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Re: thudding?

Make a movie of your engine while running. show tailpipe too.
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Old 12-29-2007, 10:19 PM   #3 (permalink)
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Re: thudding?

A bad injector will fire early and cause a bottom end knock.....
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Old 12-29-2007, 10:36 PM   #4 (permalink)
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Re: thudding?

ok i found it the air cleaner will not seat right i tried like 20 times but if you block the air intake it sounds good

i got it to set well but the aircleaner just dont fit well any ideas i want to cut off the tabs on the bottom but idk ii was told they hold it in place
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88 F-250 body,550 rear frame setup, 7.3 idi, 3:73 dana 80 rear, srw, dana 50 front, heavy duty leaf springs, back up camera, 20$ wallyworld fog lamps, class 5 bumper hitch welded to frame and gusseted, 32" steering tires all around, ac power converter,jeep bucket seats, deezee runningboards (cab only),cobra 29 cb w/ 102" whip, 2 trucklight worklights on front stake pocket each side,high lift jack behind seat, toolbox for the junk, visor, running lights, 6600 lbs with all my junk

http://youtube.com/watch?v=ILAQuHNAGE0

i plan to add propane kit, stake body bed, gn hitch,western style mirrors, and a lot more
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Old 12-29-2007, 10:42 PM   #5 (permalink)
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Re: thudding?

yeah they hold it in place from moving in a circular motion but you can just bend them out of the way. Justmake sure you have the air cleaner bolt tightened down. Try and find why it wouldnt seat.
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http://www.youtube.com/watch?v=fe622W_yZcQ

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Old 12-29-2007, 11:23 PM   #6 (permalink)
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Re: thudding?

fire wall interference mostly

i was considering a smaller air cleaner something from eddlebrock about 10in diameter and about 3 inches high

saw it at pepboys
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88 F-250 body,550 rear frame setup, 7.3 idi, 3:73 dana 80 rear, srw, dana 50 front, heavy duty leaf springs, back up camera, 20$ wallyworld fog lamps, class 5 bumper hitch welded to frame and gusseted, 32" steering tires all around, ac power converter,jeep bucket seats, deezee runningboards (cab only),cobra 29 cb w/ 102" whip, 2 trucklight worklights on front stake pocket each side,high lift jack behind seat, toolbox for the junk, visor, running lights, 6600 lbs with all my junk

http://youtube.com/watch?v=ILAQuHNAGE0

i plan to add propane kit, stake body bed, gn hitch,western style mirrors, and a lot more
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Old 12-30-2007, 12:22 AM   #7 (permalink)
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Re: thudding?

You could just remove it and run dryer hose with sound insulation down to a cold air intake. [img]/forums/images/%%GRAEMLIN_URL%%/laugh.gif[/img] K&N million mile filter.

Look at OLDBULLS pictures i met up with him not long ago and he showed me how its put together. i really liked how he did it. He says it works better than the stock cleaner.

Why is the air cleaner not clearing the firewall now?
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1997 F-350, XLT, dually, crew cab, 7.3 PSD, E4OD auto, B+W turnover goosneck hitch

http://community.webshots.com/user/91diesel
**91diesel AKA anthony2010**

http://www.youtube.com/watch?v=fe622W_yZcQ

16.66MPG



[IMG src=file:///C:/DOCUME%7E1/Owner/LOCALS%7E1/Temp/moz-screenshot-9.jpg][/IMG]
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Old 12-30-2007, 12:29 AM   #8 (permalink)
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Re: thudding?

no clue why it wont clear has always rubbed. probaly the frame mods the previous owner had done, might have moved the engine back a bit, most ppl ive seen have a inch or two but...

its just to the point where its not sitting correct ... o and when i shorted my gp controler it became a flying saucer for a few feet but no dents or warpage
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88 F-250 body,550 rear frame setup, 7.3 idi, 3:73 dana 80 rear, srw, dana 50 front, heavy duty leaf springs, back up camera, 20$ wallyworld fog lamps, class 5 bumper hitch welded to frame and gusseted, 32" steering tires all around, ac power converter,jeep bucket seats, deezee runningboards (cab only),cobra 29 cb w/ 102" whip, 2 trucklight worklights on front stake pocket each side,high lift jack behind seat, toolbox for the junk, visor, running lights, 6600 lbs with all my junk

http://youtube.com/watch?v=ILAQuHNAGE0

i plan to add propane kit, stake body bed, gn hitch,western style mirrors, and a lot more
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