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Runstuns November 13th, 2019 17:47

Turbo underboost.
Yeah here we go,
Turbo underboost. Still go'es into limp mode,
2003 jetta tdi wagon.
Iv'e done most everything else. All vac lines, Cleaned turbo vanes. new intercooler, new actuater, Wind's up nice but still underboost.
Seem's overboost is a lot easier to fix.Will deleting the EGR help

STDOUBT November 13th, 2019 19:27

Deleting the EGR will not help.
How sure are you the new actuator is adjusted correctly?
In addition to vacuum lines, the connections on the charge air tract,
boost pipes-downpipe connections to and from the new IC?
You didn't mention intake manifold, but that's a side issue maybe.
Assuming you've read this:
...and knowing the codes stored could save you a bunch of time diagnosing.

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