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Duplicated post. Delete

Discussed my problem with the seller, ProComp. It agrees that the booster is bad and likely was a manufacturing problem. I'm going to send it back and get an exchange unit.

Thanks again for the...

Yes...the pedal pulls down as if a "ghost" was doing it. I've adjusted the rod 3 times and even set it so it was way too short, and then tried it with the master cylinder off the booster. It didn't...

I replaced my master cylinder and booster with chrome ones. I bench bled the M/C. When I run the engine, (no foot on the brake pedal) the booster pulls the brake pedal down and locks up the calipers...