Can this switch be bypassed Safely on a 603?

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hum.....
1987 300TD 311,000M Stolen. Presumed destroyed

I'd want to have a boost gauge hooked up first. To bypass it just unhook the connector. Or re-route the boost lines to bypass the changeover valve.

-J

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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.

I have high doubts my turbo is boosting very much at all if any. I have the worlds slowest 300TD....

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hum.....
1987 300TD 311,000M Stolen. Presumed destroyed

If you're just doing a test eliminate the whole overboost system: Re route the vacuum lines to send manifold pressure right to the ALDA. I would hook up a boost gauge too, you really want to know what things are doing.

-J

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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.

why does the Alda have a Y split to it?

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hum.....
1987 300TD 311,000M Stolen. Presumed destroyed

Because a line goes to the transmission modulator on the fender. It should firm up shifts when under boost. If you're doing a test remove everything from the ALDA system, then add things back one at a time.

-J

I think with a turbo problem I have a vac issue I need to track down. but the turbo is higher up. burning more fuel without it. Thanks!

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hum.....
1987 300TD 311,000M Stolen. Presumed destroyed

You really shouldnt without egt/boost gauge.

1987's dont have p2 flaps?

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http://superturbodiesel.com/images/sig.04.10.jpg
1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42