Still have low boost - Ford Powerstroke Diesel Forum
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post #1 of 6 Old 11-19-2012, 02:57 PM Thread Starter
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Still have low boost

Past weekend I installed IPR Gen II EGR delete, Upgraded STC fitting, & oil cooler. Cleaned turbo for 2nd time(it has a lot of rust pitting on exhaust side) and I still have 19-20 PSI at WOT. Cant find any leaks in exhaust or CAC BUT I have been noticing that WOT VGT % is around 30-35 until i let off throttle then it goes down to 15%. Could it be a faulty VGT solenoid? Truck used to get 27-28 at WOT that is why I cleaned it the first time and never changed. This time I decided to do all three of the above upgrades. Any suggestions woul be appriciated.

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Weather I am 12 or 64 gonna live my life like there aint gonna be no more.

2005 F-250 HD edition
Linex Bed
Access Lorado cover
Edge Insight CS with EGT probe
Dieselsite coolant filter
Cat ELC
Kitty Delete pipe
K&N CAI with S&B filter
6.4 Banjo bolts
Upgraded Blue FPR spring
Rotella T-6 & Rev-X
Muff delete pipe
Glowshift Fuel pressure guage
SCT X3
IPR Gen II EGR Delete
IPR STC fitting
ARP Studs
Black Diamond Titanium Gaskets
Dummy Plugs & Stand Pipes
MTW Stage 1

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post #2 of 6 Old 11-20-2012, 08:06 AM
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yup sounds like the vgt solenoid is going up. As soon as you let off the throttle you should see immediately it go up to 55-70%
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post #3 of 6 Old 11-20-2012, 09:16 AM Thread Starter
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Would switching vgt solenoid with a friends solenoid tell me if mine was bad?

Weather I am 12 or 64 gonna live my life like there aint gonna be no more.

2005 F-250 HD edition
Linex Bed
Access Lorado cover
Edge Insight CS with EGT probe
Dieselsite coolant filter
Cat ELC
Kitty Delete pipe
K&N CAI with S&B filter
6.4 Banjo bolts
Upgraded Blue FPR spring
Rotella T-6 & Rev-X
Muff delete pipe
Glowshift Fuel pressure guage
SCT X3
IPR Gen II EGR Delete
IPR STC fitting
ARP Studs
Black Diamond Titanium Gaskets
Dummy Plugs & Stand Pipes
MTW Stage 1

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post #4 of 6 Old 11-20-2012, 09:50 AM
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i dont c why it would hurt. Never switched them up before though
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post #5 of 6 Old 11-20-2012, 09:56 AM
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Be very careful doing a switch. KEEP THEM VERY CLEAN. Meaning, keep area free of dirt. And don't just drop the one you pull on the engine compartment or some where it can get contaminated. Have a baggie to drop them into. Better safe than sorry.

Immediately upon removal from turbocharger, place the suspect control valve in plastic tube
container provided with service kit base #6F089. Handle the valve by it's solenoid body only. Do
not attempt to clean or wipe oil off of valve. Do not let the valve come in contact with anything
prior to placing it in the container. This includes rags or fabric gloves that could contaminate the
valve mechanism with lint.

From this file: (has torque values also, and a good read)

http://www.fordtechservice.dealercon...6lvgtguide.pdf
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post #6 of 6 Old 11-20-2012, 12:51 PM
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very good info man

2004.5 Mods: CTS, Lots Of Gauges, 7 inch Stack, ARP Studs, Tuned by Eric, SAP Diesel Full Fuel System, WEP Ported Intake Manifold, Mechman Alt, BPD 6 Phase Ficm, BPD Oil Cooler, BPD Oil Bypass, Warren 350cc conventionals, SAP Diesel/Warren Diesel Twin Pump Kit, SAP Diesel Triple Turbos and SAP Diesel Trans in Progress.

www.sapdiesel.com

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