Loosing vac

[NorCalTurbos]

When I step hard on the breaks my engine almost shuts of until I release my foot then it idles fine again??? I have a vaccum booster set up from an 87 regal limited and I'm pulling vac from the block on the TB

 

[we4Mateo]

Checkballs gone bad.

 

[Chuck Leeper]

Converter unlocking? [Assuming it's locked to begin with....]

 

[v6turbo87]

You mean check valve?

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[TurboBuRick]

Have you vacuum checked the booster?

 

[NorCalTurbos]

Have you vacuum checked the booster?

Not yet, how is this done?

 

[v6turbo87]

http://www.ehow.com/how_7507543_test-brake-boosters.html#page=2

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