Question about 1991 Toyota Pickup
Turn the idle screw clockwise on top of throttle body. This will lower the idle and get rid of your up & down idle when you depress the brake.
Posted on Feb 05, 2010
I suspect what you have is a vacuum leak.
1. Try hunting down the leak with carb spray. Don't get too crazy with it, when you get to your leak it will change the way it runs. Also do not deliberatly spray this on spark plug wires as one stray spark and you will need a fire extinguisher. This method is safe, just use your head.
2. If you detect a leak at the brake booster, unplug the vacuum source line for it and plug it. Then trying running the truck again. If it runs normal the leak is in your booster and must be replaced.
Posted on Feb 03, 2010
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Posted on Jan 02, 2017
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