View Full Version : 5.4 engine noise

05-06-2007, 12:35 PM
I have a F250 with a Triton 5.4 V8. There is a Whining noise from under the plastic on the intake manifols area. It sounds like a whining power steering pump. Anyone know what is under there that could make this noise? It seems like it is vacuum noise but I know nothing about the intake on these motors. Maybe it's normal?

05-06-2007, 02:45 PM
what kind fo fluid do you have in your ps pump? theres a tsb for wrong fluid type causing excessive noise

05-06-2007, 06:28 PM
seeing as its an ex forestry truck, it's possible they put the wrong fluid in there

05-10-2007, 04:32 PM
Good thoughts but it it not coming from the PS pump. It is a vacuum noise, it continues to make the noise after the engine is shut off, until the vacuum runs out. About a second and a bit. I also climbed onto the motor and can clearly hear it is coming from the top of the motor.

05-10-2007, 04:38 PM
air conditioner maybe,my gmc always has noise after i turn it off kinda like a hissing,but its normal sound of the air conditioner de compressin

05-10-2007, 04:41 PM
little vacuum hose on the back side of the engine. you won't see it, but its there. feel with your hand. this is a trouble spot

05-10-2007, 05:30 PM
would it be the booster? my dads b2 dose the same thing

05-10-2007, 07:59 PM
maybe you have a hidden turbo :D

05-10-2007, 09:35 PM
Nope!!!!! No turbo. I'll check the hose in the back, sounds like the closest item to the problem. Thanks for all the advise.

05-10-2007, 10:31 PM
the 5.4's have a pretty big network of vac lines, evap lines etc, check em all and make sure there routed properly, check it and lemme know ill look into any possible tsb's or recalls