Psst-psst engine noise

Squirrely418 · #1 (**permalink**) 04-28-2012, 10:28 PM

I have a 2005 F150, 5.4 triton. I bought the truck used and it came with an Edge tuner. It's lifted with 35's.

Under mild acceleration I get a psst-psst-psst-psst-psst-psst type noise. Sounds almost like air... It only happens in drive when you get on the gas and put a load on the engine but not always. It doesn't seem to happen if you mash the pedal...

I can't seem to replicate this sound in the driveway.

I've never heard this sound before. Any ideas?

Squirrely418 · #2 (**permalink**) 04-29-2012, 09:31 AM

I've been searching the net and this site... the only thing I can find that sounds close is turbo flutter.

I don't have a turbo.

Any help please?

Thanks!

Squirrely418 · #3 (**permalink**) 04-29-2012, 06:39 PM

anyone?????

anything?

danorules · #4 (**permalink**) 04-29-2012, 07:29 PM

Its hard to tell from your description, maybe an exhaust manifold leak.

Squirrely418 · #5 (**permalink**) 04-29-2012, 07:35 PM

I know the description is weak. It's similar to the cut off sound from an air pump. But they are short bursts...

Maybe an exhaust leak?

danorules · #6 (**permalink**) 04-29-2012, 07:49 PM

Are all of your spark plus in place? Some of these motors had p problems where they would spit out the plugs. You may have one out of place.

Squirrely418 · #7 (**permalink**) 04-29-2012, 08:28 PM

yikes. I hope it's not a plug issue.

danorules · #8 (**permalink**) 04-29-2012, 08:34 PM

Maybe a vacuum leak somewhere

Squirrely418 · #9 (**permalink**) 04-29-2012, 08:51 PM

I'll hit it with carb cleaner and see if I get a surge. The truck runs great, no noticeable power loss at all. Just the noise.

This is gonna have to be a tomorrow project.

Thanks!

critterf1 · #10 (**permalink**) 04-29-2012, 08:51 PM

Most likely an exhaust leak.

Papa Tiger · #11 (**permalink**) 04-29-2012, 09:08 PM

Try to figure out which side, it may be a manifold to exhaust pipe gasket. Se if you can tighten it up, or stop off at an exhaust shop for $20 bucks.

brandonorban · #12 (**permalink**) 04-30-2012, 11:21 AM

Does it have an aftermarket air intake system? Mine with a k and n does it

Squirrely418 · #13 (**permalink**) 04-30-2012, 09:52 PM

I'll know more tomorrow

Squirrely418 · #14 (**permalink**) 05-02-2012, 07:18 PM

Quote:

Originally Posted by brandonorban

Does it have an aftermarket air intake system? Mine with a k and n does it

interesting. Mine is stock however. I finally broke down and took it in. They couldn't find anything and told to not worry about it....

guess I'll put some louder exhaust on and ignore it.

I did have the shop change the plugs. Everything I've read about them had me uneasy. And, I hade water in the front diff.

As of today; all new fluids, new plugs, and no error codes.

shawn001 · #15 (**permalink**) 09-19-2012, 08:54 AM

mine does this as well, only when hot. i'm pretty sure its an exhaust leak. im going to get it in, if they find anything i'll update