Compression Ignition Addict
Join Date: Aug 2006
Location: Tallahassee, FL
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Please help: EVRT valve and vibrations...
I think I made a breakthrough today diagnosing vibration/buzzing that I've got at idle. Been having problems with the constant vibing (my bedliner and dash buzz at idle) and also turbo fart while cold:
This is what I did on a hunch:
With key off, unplugged the little electrical connector on the upper right side of the exhaust side of my turbo housing (the VGT Control Valve)...
Started the truck- SMOOTH AS SILK! I havn't heard my exhaust have a deep rumble like that in ages! It sounded deep and CLEAN.
OMG! ALL VIBRATIONS GONE. GONE.
No wooshing in exhaust and no turbo whistle.
Raised the RPM's a bit in neutral and while powerbraking. No whistle.
Turned off engine. Read the codes: P0040 and P1000. Plugged little connector on turbo back in. Started truck:
Still SMOOTH, NO VIBES ANYMORE! HAHA...AND Turbo whistle.
Now the turbo would spool up to 10 psi while raising the revs in neutral...it would only push 3-7 before in neutral.
Took it for a drive down the street...WOW throttle response and quick spool up. Felt like a different truck...for a moment until...
The BAD part: Within 2 blocks of accelrating and shifting and coming to a stop...THE VIBES ARE BACK AT IDLE...
Also, the idle started jumping 50 rpm erratically, up and down, until I gave it throttle a few times, then it went back to normal.
WHAT IS HAPPENING? I think I made progress figuring out the problem? Is my turbo totally stuck? What's the deal.
Marc, other techs chime in? Thanks.
"That which does not kill us makes us stronger"
"The only easy day was yesterday"
2006 F-250 SC 4x2 6.0
High Idle Mod
Diamondeye 4" Stainless Turbo-back Exhaust
Last edited by DieselViking; 11-29-2007 at 08:41 AM.