Where is the icm located on 1991 Camaro 3.1 - Cars & Trucks

cam shaft postioner

Check the icm plug with a led testlight for pulse while the engine is cranking. Test the wire connector with the small wires going into the coil for pulse.The v8 has a opti-spark distributor behind the waterpump that is prone to failure. It has the pickup inside it that tells the icm when to spark. If no pulse at icm distributor is bad. If pulse at icm but not at coil, icm or wiring between icm and coil is bad.The coil also needs pos.+ power on 1 terminal to operate. Be SURE to check the security light on the dash. If VATS [vehicle anti theft system] fails its usually within the 2 wires going from the key chip in the ignition tumbler to the body control module. Mine were purple and tan.Trying to start it with the wrong key can put it in lockout mode also. There are bypass modules available online for vats problems or you can even install a resistor in the wire to bypass the keychip part and the door alarms still work.

The ignition module is not getting power or ground one . The module can be good and if not getting power or ground can not work correctly .

Is the fuel filter ok? - fuel pump ok? Sometimes a new fuel pump is faulty. You may need to check your fuel pressure. Could even be a plugged fuel return line. PS be careful using starter fluid - it can be hard on an engine. Le t m e know. Thanks

It is located on the bottom of the engine, inside the oil pan.

Here is a link with a lot of information that I think will answer your question and more:
http://www.autozone.com/autozone/repairinfo/repairguide/repairGuideContent.jsp?chapterTitle=Distributor+Ignition+System&partName=Engine+Electrical&pageId=0900c152800b83d3&subChapterTitle=Diagnosis+And+Testing&partId=0900c152800b837e#hd1-1-3

you are right the green should be the hot wire or positive just check with a auto parts store to make sure but im almost certain you will be ok.

Check the distributor module (ICM), it may have gone bad and needs to be replaced. It's around $40.00 and it's under the rotor in the distributor assembly. Check the red lead wire to the HEI for voltage, there should be 12 volts. It common for the ICM to fail on the HEI system when they heat up and if you go to Auto Zone, they can give you the step by step instructions to replace the ICM. Good luck and keep me posted, be glad to help.

It is located on the left hand kick panel fairly high

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