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73-87 Chevy _ GMC Trucks => Performance => Topic started by: MyOldScottsdale23 on July 04, 2013, 09:57:38 pm

Title: Brakes causing miss and stall?
Post by: MyOldScottsdale23 on July 04, 2013, 09:57:38 pm

I just recently put a crate engine in my 1985 GMC K10 Sierra Classic. It sat for a few months in a field. Since I've had it running when I press the brake pedal all the way I here an air leak under the dash and the engine will miss and stall. Any suggestions?

Title: Re: Brakes causing miss and stall?
Post by: bd on July 04, 2013, 11:22:46 pm

Replace the power brake booster.  Make sure the vacuum hose supplying the booster is in good shape.  The "air leak" is a ruptured diaphragm in the booster.

Title: Re: Brakes causing miss and stall?
Post by: Irish_Alley on July 04, 2013, 11:48:45 pm

(http://www.naioa.com/v2/modules/Forums/images/smiles/iamwithstupid.gif)

Title: Re: Brakes causing miss and stall?
Post by: MyOldScottsdale23 on July 05, 2013, 05:54:19 pm

Will do. Thanks. I'll let ya know how it goes.

Title: Re: Brakes causing miss and stall?
Post by: Fairlane514 on July 05, 2013, 07:09:01 pm

You may try a new check valve.....its easy and cheap before you have to replace the whole booster.  Its the plastic piece in the front of the booster where the vacuum line plugs into.