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940 -Engine cutting out-Any thoughts? 900

posted by  someone claiming to be jmars on  Thu Jan 23 03:24 CST 2003 [RELATED]

You need to check the constant idle system (CIS). First look for loose hoses to the idle control motor. It is located near the throttle body (about 1.5" diameter 3-4"long) and should have a hose from the air intake and to the intake manifold. If either has become disconnected, reconnect and your problem will most likely be solved. If not you need to go deeper into the CIS and check both the motor and the control computer. You can easily check if the CIS is working by noting if the rpm increases immediately after the engine starts. This is normal for an operating CIS. If there is no speed up then the CIS is malfunctioning. Note than this motor is expensive if bought from the dealer, so if you do need one it is best to shop around and even purchase a used one.






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