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Well seems like I still have an issue. Started this morning and vgt is sitting at 85...crap. get on the road and I have to floor it to get the vgt to drop to normal then it stays normal for a bit then drops to 15 and it will jump to 85 while driving 70mph.
Also I'm driving at 70mph and zero boost.
I have no idea other then maybe a bad vgt solenoid?? Any thoughts.
Well when the vgt is at 85 the boost is way up and i can floor it and not go over 40mph untill it lets loose then all is well. Not blowing any smoke either.
I'm way outmof my knowledge here.
Big big fan of DieseltechRon, but I wouldn't recommend slathering the posts, ring and vanes with anti-sieze like he does.
Brush it on and then wipe it off so it leaves a very light coating.
Use the hi temp nickle or standard silver. Do not use Copper Anti-Sieze
Josh
I went completely dry on my turbo cleaning I just completed. It should work good. I thought about using high temp anti seize but decided against all together.
Well when the vgt is at 85 the boost is way up and i can floor it and not go over 40mph untill it lets loose then all is well. Not blowing any smoke either.
I'm way outmof my knowledge here.
Anyone have any thoughts? Vgt or did my cleaning mess something up?
VGT at 85% is a commanded value, not actual. Your seeing VGT@85% and have boost way up, would have told me that its stuck or at least, the vanes are not at 85% (closed).
Stab the throttle and boost comes on fast, let off fast, just as you feel it kick in, then let off fast... it should fart and boost should drop immediately, not slowly. Normally it operates without ever making a fart, what its supposed to do. But the fart would also indicate it moved the vanes in the correct direction.. stab it... boost comes on hard, get off the peddle fast, vanes close and excess pressure is discharged into the intake tube.. fart.
I test this theory all the time and at least a conscious effort to produce a fart at least weekly. Tells me the vanes are actually moving. I'm not smart enough to see boost at 14lbs and the vanes at 50%... because the 50% is commanded, not actual.
there will be comments that say this "fart" gauge doesn't really work... i don't have stuck vanes, I live in a high humidity area and have never cleaned the turbo. Exercising the vanes to this degree is no guaranty they aren't rusted, but they are moving and rapid enough to cause the fart... could be causing damage, I don't know for sure.... it works for my truck.
Reason why I'm thinking vgt is today i started it when i got home.
At first start vgt was at 52%. It then proceeded to slowly come down to 24%. I went inside and came back out after about 10 minutes and it was at 85%.
Just feels like it's the solenoid or something. But again could be wrong. Cleaning sure didn't fix it the way i thought bit it did change the characteristics of the issue?
Reason why I'm thinking vgt is today i started it when i got home.
At first start vgt was at 52%. It then proceeded to slowly come down to 24%. I went inside and came back out after about 10 minutes and it was at 85%.
Just feels like it's the solenoid or something. But again could be wrong. Cleaning sure didn't fix it the way i thought bit it did change the characteristics of the issue?
Too bad you're so far away, the Turbo Test on IDS would be perfect for you
You do have a leak you mentioned.. in the Y-pipe, that can mess things up.
I would think 24% at idle is pretty high, mine sits around 75% after starting the truck, even cold.
If the vanes are stuck, the PCM will command a lower % to open them up. For example, you would expect about 70% at idle, but if the vanes are stuck closed which would equal 85%, the PCM will command the opposite to open them up.
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