Over the past few weeks I've noticed a hissing sound on acceleration? sounds like an air line leaking coming from the engine, can hear it with windows down and up. However, it doesn't happen all the time?? oddly very speratic? almost seems like there's a little loss of power as well, not really that noticeable though. Checked underneath the hood, didn't see anything wrong - unfortunately it happens only during acceleration when driving.
I was going to suggest you check all your I/C boots. But you mentioned that you checked everything under the hood. Have you done a aftermarket in-take? If so it could be surge your hearing from the turbo? Hopefully someone comes along thats more intellengent then me who could help you out bud. Good luck!!!
BIG JOE PAA#100
2000 F250 7.3L PSD SC SB 2wd 4R100 DP F5 No start/stock/60E/80E/hi idle1200/120R, JWVB, Autometer Ultra lite gauges(pyro,tranny,fuel,boost),4' MBRP DP,8' MBRP black single stack,6637,RDP Cover,RDP HPX,RDP FRX,RDP AIH delete,RDP CCV mod,muffler delete,foil delete,08 diff cover, leveling kit, ProComp shocks,fomuto valve,zoodad,a/c mod, stan-cor,vanity plate.
Bringing this back from the dead. I have heard this recently in my truck, it is cold out now, and it only happens when it is cold. Once the truck is fully warmed up, I don't hear the hissing sound. If I step on the throttle hard, it also doesn't make the noise. Any suggestions?
ok, I've done some more research and it appears that this is caused by the EBPV. Now the question I have: should it do this while driving (it is a loud noise, and happened after 10 minutes of driving), ie is it normal?
And if it shouldn't happen, should I just disconnect at the valve and not worry about it?
It doesn't seem normal to me, because it is loud when driving (at cruise).
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