Need your knowledge!!

Hoss 350

My GSP, Dutch
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Things to look for before you buy it...

1.) First and foremost, pull the air induction tube off of the turbocharger inlet (big black rubber pipe that comes from the air filter box and necks down to the turbo) so you can see the compressor blades on the turbo. They should be shiny and SHARP. I mean, sharp enough to cut you if you pushed hard. If they are dull, pitted, bent, broken, etc, then the engine has taken on dust, and it is most likely wrecked. If there is lots of dirt inside the tube, this can also be an indication of the airbox leaking in dirt. Check the airbox for broken tabs where it holds down on the filter. Any of the above and I would run away.

2.) If it is an automatic, it should shift crisply and quickly. Smooth, slow shifts are bad, it means she is about to roach. Smell the fluid, it should not smell burnt at all.

3.) If she is a stick, then the tranny should shift smoothly, clutch should disengage fully when you push it.

4.) Put her in 4x4 and listen for bad noise. More noise is not necessarily bad, they do make a little noise in 4x4, but if it whines, grinds, or whirrrrs, then you gots problems.

5.) Check the oil. It can be black, but it should not have water or be brown or milky.

6.) Buy yourself some SCA strips to test the coolant for SCA. If the truck has no SCA in it, then you can only assume that it never had SCA in it, and then you are taking your chances with a cavitation problem. (BIG $$$$$)

Then just do the normal. Look for leaks, listen for odd noises, you know the routine. Good luck, and welcome aboard...

Oh, the WHoosh at high idle is the Exhaust Back Pressure valve. Totally normal, it is just a device that helps the truck warm up faster...
 

Hoss 350

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TurboTy said:
thats some weird stuff with the wastegate, mine makes the same sound when cold, some people look at the truck all stupid when its warming up cause youll get that whoooooosh then...stop...when the wastegates doin its thing, lol.....pretty funny, part throttle i get the woosh all the time, obviously since i'm not in boost, when i first got the truck i thought sumtin was wrong, then i realized what the sound was, lol....course the 4 inch downpipe magnifys it a little now, :sweet


course back to the original intent of the thread, only other thing i'd check is popping the oil fill cap when its runnning and see if you got any excessive blow by, i think someone had mentioned that in another thread....
Just FYI, the wastegate and the EBPV are two very different things which operate differently and have different functions.

The wastegate is an orifice in the turbine side of the turbocharger which bleeds excess exhaust pressure past the turbine wheel to help control exhaust backpressures and boost pressure. It pops open when the intake hits a certain pressure, and keeps the turbo from over-speeding or over-boosting the engine.

The EBPV is a butterfly valve downstream from the turbo in the exhaust, which closes to restrict the passage of exhaust gasses. This performs two functions. One, it holds the hot exahust gas in or near the engine longer, which keeps combustion temps up and helps warm the engine up faster. Two, it puts the engine under a load, as it forces the gas past the closed valve, and this also helps it warm up faster. It's purpose is solely to warm the engine up when it is cold out.

Just a quick FYI... Now you can dazzle your buddy's with your knowledge when they ask why your truck sounds like a 747 about to take off... :D
 

Hoss 350

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dieselnorth said:
Also wondering....were the 2003 with 6.0l PSD any good. I know it was the first year for 6.0 PSD and was wondering if it was a problem year while they worked out the bugs.
I would not buy one, personally. My brother owned one and it was a nightmare. Some are good, some are bad. You take your chances when you buy one... It is a game of Russian Roulette that I would just as soon not participate in...
 

Lurch_F350

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Crusin350 said:
I had the same problem with the EBPV. Mine was bad, I could drive all over town (usually around 20-30mins) before mine would quit making that wooshing noise, no matter what the temp guage read. Sometimes it would not quit. I kept throwing codes 1. P1670 EF Feedback Signal Not Detected 2. P0471 Exhaust Back Pressure Sensor Circuit Performance 3. P1249 Wastegate Fail Steady State Test. So I replaced the wastegate with the banks big head. Didn't fix it:dunno Then I went to replace the EBPV sensor, and noticed that the tube coming up from the manifold was broke so I replaced both the tube and sensor(factory parts not exactly cheap) Didn't fix it-mad I heard about a sensor bypass from another site so I bought it (only like $35.00) and still no fix:cussing: Finally I figured out that if I just leave the sensor unplugged I have no problems. Not the solution I was looking for but seems to work for now. If anyone has any suggestions let me know, PLEASE!!!
I'm kinda curious, which plug do you have pulled the one at the sensor or the one that goes into the solenoid on the turbo housing?

I have this same problem, never goes away completely just gets less when she's warmed right up.
 

TurboTy

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Hoss 350 said:
Just FYI, the wastegate and the EBPV are two very different things which operate differently and have different functions.

The wastegate is an orifice in the turbine side of the turbocharger which bleeds excess exhaust pressure past the turbine wheel to help control exhaust backpressures and boost pressure. It pops open when the intake hits a certain pressure, and keeps the turbo from over-speeding or over-boosting the engine.

The EBPV is a butterfly valve downstream from the turbo in the exhaust, which closes to restrict the passage of exhaust gasses. This performs two functions. One, it holds the hot exahust gas in or near the engine longer, which keeps combustion temps up and helps warm the engine up faster. Two, it puts the engine under a load, as it forces the gas past the closed valve, and this also helps it warm up faster. It's purpose is solely to warm the engine up when it is cold out.

Just a quick FYI... Now you can dazzle your buddy's with your knowledge when they ask why your truck sounds like a 747 about to take off... :D

interesting, i wasnt aware of that, , did find it hard to believe how the gate would do all that, now i know why, lol..thanx!
 

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