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dwightfrye
New User
Jan 14, 2007, 6:11 AM
Post #1 of 2
(2012 views)
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1992 oldsmobile 88
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I have a 1992 oldsmobile 88 royale. a few weeks ago, my car would stall at stops. i checked the battery connections and they were loose. after tightening them all was fine. now it is stalling when i step on the brakes again but the terminals are not loose this time. what could be the cause? i originally thought it might be the battery but just last night, i could hear a clicking sound coming from the firewall when i step on the brakes.
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steve01832
Veteran
Jan 14, 2007, 6:24 AM
Post #2 of 2
(2009 views)
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Re: 1992 oldsmobile 88
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If the vehicle stalls when you step on the brakes try this. Let the engine warm up in park and let it idle. Step on the brake and listen to see if the engine idle starts to get rough. If it does, you may have a leaking brake booster causing a vacuum leak when brakes are applied. Check the booster for rot and check the seal around the check valve with the vacuum line on it. You can have an assistant hold the brake pedal with the car running in park and spray carb cleaner onto the booster. If the idle suddenly pops up a leak has been found. Remember, spray the cleaner around all the seams and any rusty areas heavily. If you find a leak, replace the booster. You don't remove the brake lines from the master cylinder when replacing the booster. Just unbolt the master from the booster and let it hang. This way you won't have to bleed the brakes saving a lot of time. Steve
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