I've had enough of the fog horn sound coming from the intake!!!! Help!!!!!!
#16
03-30-2004, 11:59 PM
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#18
03-31-2004, 01:43 AM
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hey latemodelracer, my cervini's ram air hood starts whistling around 45 mph also. I finally traced it to the aluminum inserts and took them out. Doesn't look as good but that annoying whistle is gone. Wish I could get some inserts that match my trenz grills. I would do it myselt but I have no way to weld aluminum. 
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03-31-2004, 12:04 PM
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Up until 2003, the part # is F67Z.9F715.BB. For the 2004 year model, it can be XS4Z.9F715.BC for the HD and YL3Z.9F715.AA for all 5.4 Heritage and SVT models. If you need to double-check these numbers, try to look at the engineering number stamped on the old IAC, it will look similar, but NOT THE SAME as the part ## you'll need. Any parts counterperson will know how to x-ref. the engineering ## with the Ford ##. The prices range, but lie between $70- $95.
#21
03-31-2004, 08:32 PM
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Originally posted by Aequitas
Up until 2003, the part # is F67Z.9F715.BB. For the 2004 year model, it can be XS4Z.9F715.BC for the HD and YL3Z.9F715.AA for all 5.4 Heritage and SVT models. If you need to double-check these numbers, try to look at the engineering number stamped on the old IAC, it will look similar, but NOT THE SAME as the part ## you'll need. Any parts counterperson will know how to x-ref. the engineering ## with the Ford ##. The prices range, but lie between $70- $95.
Up until 2003, the part # is F67Z.9F715.BB. For the 2004 year model, it can be XS4Z.9F715.BC for the HD and YL3Z.9F715.AA for all 5.4 Heritage and SVT models. If you need to double-check these numbers, try to look at the engineering number stamped on the old IAC, it will look similar, but NOT THE SAME as the part ## you'll need. Any parts counterperson will know how to x-ref. the engineering ## with the Ford ##. The prices range, but lie between $70- $95.
Last edited by buttfungus; 03-31-2004 at 08:35 PM.
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03-31-2004, 09:37 PM
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03-31-2004, 10:14 PM
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03-31-2004, 10:18 PM
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04-01-2004, 08:19 AM
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04-02-2004, 04:17 PM
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04-02-2004, 06:18 PM
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04-02-2004, 06:25 PM
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#29
04-02-2004, 07:55 PM
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I havn't had a chance to try it, but simply cleaning it may fix the problem too:
https://www.f150online.com/forums/sh...=clean+solvent
That thread has info on cleaning it.
https://www.f150online.com/forums/sh...=clean+solvent
That thread has info on cleaning it.
#30
07-08-2019, 11:40 PM
Iac moosing problem
I had same problem with my 4.6l V8 IAC hose was vibrating into the air snorkel.I cleaned Throttle body, EGR valve and IAC valve with no success still HUMMMM. Then I found a clogged DPFE tube on my EGR tube,mine only has one but most have two so I cleaned it out with a piece of thick copper wire and some carb cleaner and replaced IAC plastic tube with 3/4" Gas hose with the 90 degree rubber elbow that was on the old plastic tube and cutt a 1 1/2" piece of the old plastic tube so I could join them together for a nice fit with no crimping and Presto no HUMMMM and beautiful Idle and perfect throttle response