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I would not recommend it unless you are mechanically advanced because certain vacuum lines are not emissions related such as the brake booster and distributor advance some lines control carburetor functions such as opening secondaries and pulling your choke open. Also, some emissions components will get stuck open causing problems. the EGR valve for one if stuck open will cause a rush of exhaust gas into your intake manifold and cause your engine to shut off or to idle roughly and emit plums of black smoke.

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โˆ™ 2007-03-01 01:20:15
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Q: Is it possible to run a Toyota 20R carbureted engine without the emissions with all the unnecessary vacuum lines plugged?
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