Whinning Noise

[VINLAUR]

97 F350 7.3
Lately i've noticed that i'm getting a whinning noise from under the front passenger side of truck at about 1500 rpm along with this i notice rpm drop once i give it a little throtle it goes away, then reappears. some things to consider.... outside temp is around 10-20 degrees, engine temp cold, as the truck gets warmed up it does not happen, at first i thought it was a bad bearing in one of the pullies that's what kind a sound it makes. put i checked them all and it's ok. any suggestions???????????????

[pipelayerjdh]

May be the EBPV that aids in warm-up. Try unplugging the 2 wire connector under the intake on the turbo to see if it stops.

[VINLAUR]

thanks i was hoping it was going to be simple job. any draw backs in leaving it unplugged

[Deeno]

Originally Posted by VINLAUR

thanks i was hoping it was going to be simple job. any draw backs in leaving it unplugged

May take a little longer to warm the cab up but other than that, no. All the EBPV does is restrict the exhaust flow when it's cold. That makes the engine work harder to get the exhaust past the closed valve, thus creating heat faster. If the coolant gets warm faster then the heater will blow out warm air faster. As the engine warms up, the PCM uses engine oil temp. readings (and probably other reading as well, but I believe EOT is the main one) to monitor engine temps and gradually opens the EBPV. Hope this helps.
P.S. Any techs. on here, chime in and correct me if any of this is wrong. Don't want to mislead anybody

[mustangz]

You sure its not your wife lol.I have nothing else to add.Hope you get it fixed.I just know every time my wife rides with me I have a whining noise coming from the pass side!

[erismanj]

I have the same thing going on. It sort of sounds like a power steering pump or a pto sound, and I isolated it to the oil cooler pipe(the 1 1/2 inch pipe that runs under the driver side exhaust manifold). It drives me crazy. It is there during warm up and goes away. I took it to the dealer and they said it is a normal noise, but I'm not so sure. When yours is making that noise, pop the hood, use a long screwdriver or bar and put it to your ear from that pipe and see if it is coming from there also. Let me know if what you find out, because I have been searching the post for a while looking for someone else who hears this. thanks, Jim

[VINLAUR]

Yes I Unplugged The Ebpv And It Seemed To Do The Job, Quick Fix Thanks Guys......

[pipelayerjdh]

Drive it a while to make sure that was it. If you feel you need the warm up aid, you can plug it back up and know the noise is not a problem.

[erismanj]

I looked for the two wire plug,and found two. I wasn't sure which one it was. Can you tell me specifically where it is located, and the color of the wires so I can try the same thing. thanks , Jim

[Deeno]

Originally Posted by VINLAUR

Yes I Unplugged The Ebpv And It Seemed To Do The Job, Quick Fix Thanks Guys......

Congtats on getting her fixed Hope that was the problem.