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Old 09-13-2019, 05:45 PM   #2
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Location: Charlotte NC
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Default Re: Turbo surging/cycling

You need to get a scanner on it, and monitor the live data. There are numerous intermittent conditions that can cause this issue. One bizarre one is a bad oil temp sensor. Another is a sticking fuel quantity valve.

Any signs of pulsing or rough idle?

Have you checked the turbo actuator for the pulsing movement at idle?

What are you using to check codes? A sprinter specific scanner (not scanguage) is needed to view all the modules for pending/stored codes.

Other thoughts, Pedal sensor, check live data to make sure its consistent.
Exhaust or boost leak. Either one can open/close as the boost pressure changes, creating a hysteresis loop.
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Last edited by Midwestdrifter; 09-13-2019 at 05:49 PM.
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