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Jscottrad Jscottrad is offline
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Default Lost Boost - 06-11-2019, 08:11 AM

I've read and done all the common checks. No boost leaks, replaced vacuum lines for waste gate control. Thought I would get a second opinion while I wait for my new boost solenoids to show. PWM is 99 but I'm slow to spool and only reach about 10psi. Vargas turbos with billet compressor wheel (20% more boost according to them) I hit the 17psi target in map 2 normally with no problems. All the normal mods. Any advice is welcome.
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Vorsprung_CJB Vorsprung_CJB is offline
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Default 06-11-2019, 08:59 AM

Did you check DV vacuum lines? Reminds me of when one of those is disconnected.
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Jscottrad Jscottrad is offline
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Default 06-11-2019, 10:58 AM

DV's are in my back yard shed. checked vacuum to blow off valve and made sure valve was sealing tho...
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Jscottrad Jscottrad is offline
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Default 06-11-2019, 02:31 PM

Finished replacing all vacuum hoses and both bleed solenoids, still no help. while looking for a leak downstream of the turbos noticed when running there is oil vapor coming from rear air inlet. I have an air oil seperator installed. Could I be losing boost to the PVC system?
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Default 06-11-2019, 02:43 PM

Did you check wastegate movement while applying vacuum with a hand held vacuum gun or measure vacuum at the boost solenoids?

N54 WG Vacuum Line Testing HOW-TO - YouTube


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Jscottrad Jscottrad is offline
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Default 06-11-2019, 03:07 PM

Yes, and on start up both waste gates go full closed, unplugging boost solenoids makes them return to wide open
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Jscottrad Jscottrad is offline
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Default Found the problem... - 06-12-2019, 02:28 PM

Time to rethink which turbos to buy...
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Default 06-12-2019, 03:23 PM

Yikes!!!


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Default 06-13-2019, 10:36 AM

Quote:
Originally Posted by Jscottrad
Time to rethink which turbos to buy...
whoa..


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Default 06-13-2019, 03:57 PM

Vargas strikes again!

How many miles on those?
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