7.3 Ltr '01 Engine hissing @ 1500rpm

[clint70]

I have an F 250 '01 with 283,000 mi. the engine hisses at only 1500 rpm while the engine is cold. It seems to go away after it warms up... what could be the cause? Vaccum leak maybe. I am new to diesels so it could be normal. Any input is good.

 

[Toptech]

Where is the hissing noise coming from?

 

[clint70]

Where is the hissing noise coming from?

It sounds like the engine compartment, I would guess around the Turbo? Not certain.

 

[trackspeeder]

EBPV is closed.

 

[clint70]

The EBPV is the engine bypass valve ?? Is it automatically switch positions, what is its purpose? Is it normal.

By the way thanks so much for helping out and responding. I appreciate it.

 

[trackspeeder]

Exhaust back pressure valve.. It allow the engine to heat up faster.

It's normal.

 

[Toptech]

Exhaust back pressure valve.. It allow the engine to heat up faster.

It's normal.

EXACTLY! Thanks for clearing that up trackspeeder.

 

[MBRPCrazyford]

Clint, yes, it is normal, and it will automatically open when the engine is warmed up. Also, Welcome to SDD.com

 

[pmtern83]

I have 200000 on my 7.3 and have found the y pipe to intake connector boots were in desperate need of replacement, did a world of difference