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Lots of Monte questions! This is a question with a easy answer for a difficult reason. The idle speed on any 1995 to 2001 Monte Carlo is handled by a thing called the Idle Air Control(IAC) valve. What the valve does is regulate the amount of air that bypasses the throttle plate. The IAC valve is controlled by the Powertrain Control Module(PMC). The PMC is the black box we often called the cars "computer". The IAC valve can be checked with an ohmmeter and is either good or bad. The valve can't be adjusted nor can you mechanically adjust the engine's idle. The PMC also knows what's going on with your catalytic converter because it can read the O2 sensors and match that with other engine data. Long before the catalytic converter were to actually get "stopped up" the PMC would tell the "check engine light" to start yelling at you from it's location in the dash.

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โˆ™ 2006-04-14 18:05:17
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Q: You have a 95 Monte Carlo and you need to know how to set the idle and what signs to look for if your catalytic converter is stopping up?
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