crankshaft sensor
#1
crankshaft sensor
hey guys i have a 97 camaro rs 3.8l v6 been having trouble with no spark changed the crankshaft sensor and it smelled burnt put a new one in it fired and died then turned it over agin no spark pulled the new one and it smelled burnt as well please help with any ideas of what it could be or how to find out why its burning them up
#4
There are only a few possibilities here. The sensor is getting high voltage which fries it (pretty unlikely) or one of the wires connected tothe sensor is shorted to ground (much more likely). Well, there's mechanical damage, too, but I figure you'd notice that.
First, check battery voltage with the engine off.
Then, check battery voltage with the engine running. Not possible at the moment, I know, but as soon as the engine starts again you need to do this.
There are 4 wires connected to the crankshaft position (CKP) sensor and you need to check each one out.
yellow -- this one goes straight to the ignition module. Disconnect it at both ends and check resistance between the ends and between each end and ground. You want to see zero resistance between the ends and infinite resistance between each end and ground.
light blue with white stripe -- this also goes straight to the ignition module. Test it the same way as the yellow wire.
red with black stripe -- this goes straight to the ignition module but has a branch that goes to the camshaft position (CMP) sensor. Disconnect the CMP then check resistance between the CKP and CMP sensors, the CKP and the ignition module, and the CMP sensor and the ignition module. Then check resistance between each end and a good ground. You want to see the same thing as above. No resistance between any combination of ends and infinite resistance between any end and ground.
white with black stripe -- same situation as the red with black stripe wire and test it the same way.
First, check battery voltage with the engine off.
Then, check battery voltage with the engine running. Not possible at the moment, I know, but as soon as the engine starts again you need to do this.
There are 4 wires connected to the crankshaft position (CKP) sensor and you need to check each one out.
yellow -- this one goes straight to the ignition module. Disconnect it at both ends and check resistance between the ends and between each end and ground. You want to see zero resistance between the ends and infinite resistance between each end and ground.
light blue with white stripe -- this also goes straight to the ignition module. Test it the same way as the yellow wire.
red with black stripe -- this goes straight to the ignition module but has a branch that goes to the camshaft position (CMP) sensor. Disconnect the CMP then check resistance between the CKP and CMP sensors, the CKP and the ignition module, and the CMP sensor and the ignition module. Then check resistance between each end and a good ground. You want to see the same thing as above. No resistance between any combination of ends and infinite resistance between any end and ground.
white with black stripe -- same situation as the red with black stripe wire and test it the same way.
#5
wat do you mean by mechanical damage this is a newer motor just got it put in not sure but did find the red with black strip had a a small bit of wire showing about a half inch up from the plug and a black wire going to the oil sensor or camshaft sensor they both run the same direction but as you know it s pretty tight gettng that part of the harness down there!
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