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Second Turbo No Boost

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Old 05-15-17, 10:19 PM
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Second Turbo No Boost
So, I was out in my 93 the other day and when the turbo switched over, the second turbo made around 5lbs if boost for about a second before falling to zero boost. Now, my first turbo has normal 9-10ish boost levels, but the second has none. What could this be? Vacuum line? hose, solenoid...etc?
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Old 05-15-17, 11:25 PM
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Just from what I have observed reading on here for the last 10 years or so ( I absorb a lot of useless info..lol!)..
Check the intercooler piping to the Turbo..it is known to dislodge or come off and you lose secondary boost.
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Old 05-16-17, 11:28 AM
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If the charge control valve isn't opening, this will also cause no boost when the secondary turbo comes on.
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Old 05-16-17, 02:29 PM
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As above, start by looking for hoses, then check your solenoids, hopefully its a simple fix!
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Old 05-16-17, 03:12 PM
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Low secondary boost can also result in the actuator arm being disconnected underneath.
Last edited by Rocketeerbandit; 05-16-17 at 03:16 PM.
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Old 05-16-17, 03:53 PM
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low to no boost could be cause by the pre-spool and wastegate solenoid connectors swapped around.

Troubleshooting
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Old 05-16-17, 04:27 PM
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Check your vacuum lines. Look for any leaks.
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Old 05-17-17, 03:19 PM
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Thanks for the info. I will check on these this weekend when I can dedicate some time.

Brody, that link is fantastic. thank you
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