Drove the car about 200 miles today and at the end coming home I noticed a horn sound coming from the engine - only above 1500 rpm or so. Below 1500 it stopped. I took this video with my cell right after pulling in my garage
Sounds like some sort of resonance. I think it's heat related. After the car cooled down it stopped doing it. Anyone had something similar happen? Sounds near the intake but I can't pinpoint it.
__________________
Phil
Mk III, 3 Link, 347 EFI, AFR heads, Trick Flow intake, x cam, 3.73 Gears, 42 lb. Injectors, Moates Quarterhorse, Full Width Roll Bar
I had a similar problem. Mine was a cheap Checker Auto vacuum line from the intake to the PCV collapsing in on itself and creating a vibration. I replaced the hose with a better quality and problem fixed.
I had that same noise on my car after it got hot. The hose between the PCV and the carburetor was collapsing and creating a reed type effect. It was very soft and pliable when I touched it. I bought a thicker hose that was specific for the PCV system and the noise went away.
Jeff
__________________
Mark III complete kit ordered 12/03/2007, received #6351 1/22/2008 Homemade mods: driver footbox extension with deadpedal and dimmer switch, widened passenger footbox, brake reservoir mounting bracket, under trunk storage box, custom dash and dash extension, heater forward box, custom glove box, under dash switch panel, Explorer motor carb conversion, first start 7/10/2010, paint by Performance Automotive 11/20/2010-5/7/2011, Graduated 11/22/2011
Poke some holes in it and you can play it like a flute or bagpipes.
Ron
__________________
Racing: "The world's most efficient way to turn money into noise and smoke"
"Think with your dipstick, Jimmy"
"Anybody can BUY a car, only a chosen few build their own"
FFR Challenge car #4182SP Carbed 302, Holley 600CFM, E303 cam, T5, 3 link rear-3:55, Levy wheels, Kumho tires, Fire Safe fuel cell, Griffin race radiator, ISIS wiring system, MSD 6ALN NASCAR ignition, 85 Mustang distributor,
do you have a vent line? I couldn't tell from the vid. You should have a vent line just upstream of the throttle body, that usually connects to a fitting on the oil fill of the passenger valvecover. That's where fresh air normally enters for the PCV system. If you block it off, it'll suck air around front and rear main seals, valve cover gaskets, etc....and make all kinds of crazy noises.
do you have a vent line? I couldn't tell from the vid. You should have a vent line just upstream of the throttle body, that usually connects to a fitting on the oil fill of the passenger valvecover. That's where fresh air normally enters for the PCV system. If you block it off, it'll suck air around front and rear main seals, valve cover gaskets, etc....and make all kinds of crazy noises.
Yes there's a vent line connecting from the elbow just in front of the throttle body to the oil fill tube. It's underneath not visible in the video. I mistakenly plugged that years ago and got a bunch of high pitched squeaking so I know what you're talking about. I'm pretty sure it's the PCV tube. It's a real thin rubber I can easily pinch closed. Plan to replace this evening.
__________________
Phil
Mk III, 3 Link, 347 EFI, AFR heads, Trick Flow intake, x cam, 3.73 Gears, 42 lb. Injectors, Moates Quarterhorse, Full Width Roll Bar
Welcome to FFCars! The
representations expressed are the representations and opinions of
the FFCars.com forum members and do not necessarily reflect the
opinions and viewpoints of the site owners, moderators, Factory Five
Racing, Inc. or Ford Motor Company. This website
has been planned and developed by FFCars.com and its forum members
and should not be construed as being endorsed by Factory Five
Racing, Inc. or Ford Motor Company for any
purpose. "FFR", "Factory Five", "Factory Five Racing", and the
Factory Five Racing logo are registered trademarks of Factory Five
Racing, Inc. FFCars.com forum members agree not to
post any copyrighted material unless the copyrighted material is
owned by you. Although we do not and cannot review the messages
posted and are not responsible for the content of any of these
messages, we reserve the right to delete any message for any reason
whatsoever. You remain solely responsible for the content of your
messages, and you agree to indemnify and hold us harmless with
respect to any claim based upon transmission of your message(s).
Thank you for visiting the FFCars.com Forum dedicated to Factory
Five.
Linear Mode
