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Old 04-23-2007, 07:10 PM   #51
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Quote:
Originally Posted by Archon
Pay particular attention to what happens to the voltage as the magnet on the cam gear passes by the cam sensor.
I was looking over the step by step forms that u sent me and it says to disconnect the pcm..Looking at the pcm located by the motor I see 2 bolt that connect the wires to the pcm...Is this what it i have to unscrew to disconnect the pcm?
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Old 04-24-2007, 12:15 PM   #52
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Old 04-24-2007, 07:04 PM   #53
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Thanks again Archon, Sorry 4 all the questions but,is there a illustation or do u know how to check the voltages at the PCM?
Thanks.
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Old 04-24-2007, 08:38 PM   #54
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Old 04-28-2007, 05:43 PM   #55
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Originally Posted by Archon
Hey Archon,
I went by the ECM Connection 1 illusration you sent me and saw that black # 7wire from PCM was camshaft position signal !..I was so sure this was my problem because of what my mechanic caught before ..When my filter was resting on the Pcm wires it was eating away at to wires.. one f the wires was black and so happened to be # 7 camshaft position signal !

So went ahead and took all the tape out and followed the wire to the module ..Unscrewd the the harness that was connected to the Pcm and took apart the connector removing a clear blue plastic from the end of harness..Cut at least 10 inches of black wire #7 from harness and replaced it.

Put the harness connector back together and sodered the #7 wire..Then tested the wire from connector to module with meter to make sure there was a good connection
there was, screwed the harness back to the Pcm and started car. The car was disconnected when I was working on it so the SES light was not on but, when i started driving the SES light returned.
I was sure this was it..To much of a "Coincidence" with this black wire #7. Could it be internally in the Pcm?
Ohh.. and another thing I'm curious about is, the black number #7 camshaft position signal wire, goes first goes to a plug connection by the front of the motor near the coils before going into the module..Do you know what that interruption plug can be?
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Old 04-28-2007, 07:29 PM   #56
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That was certainly worth a shot. If the connector is the one that I'm thinking of, I believe it is the connection from the cabling for the crank and cam sensors and the ICM. Did you measure the voltage on #7 while you had it off? If not, check to see what the voltage is. It should be 4.5 to 5.5 volts. If it reads zero, bump the engine over a bit to make certain the cam magnet and sensor aren't lined up, and check again.

Edit - Also, just for the heck of it, disconnect and inspect that connection you were speaking of. Also, disconnect, then reconnect the connector on the front of the ICM.
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Old 04-29-2007, 05:38 PM   #57
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Quote:
Originally Posted by Archon
That was certainly worth a shot. If the connector is the one that I'm thinking of, I believe it is the connection from the cabling for the crank and cam sensors and the ICM. Did you measure the voltage on #7 while you had it off? If not, check to see what the voltage is. It should be 4.5 to 5.5 volts. If it reads zero, bump the engine over a bit to make certain the cam magnet and sensor aren't lined up, and check again.

Edit - Also, just for the heck of it, disconnect and inspect that connection you were speaking of. Also, disconnect, then reconnect the connector on the front of the ICM.
The voltage on the #7 wire was going between 3.0/4.0....I was reading in one of the forums that coils sometimes read good but, still can be going bad . The reason I mention this is because one of the mechanic'* helper notice the car shake on idle as i had mention before to you, it does it sometimes. He told a coil could be going bad. Could the engine shakeing on idle occasionally be a sign of a coil going bad?
The car just had a tune up new plug,wires ect.
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Old 04-29-2007, 08:36 PM   #58
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The voltage you measured is too low, and shouldn't be varying if the engine isn't being cranked. This is the diagram for the connection on the ICM
ICM
Measure the resistance between the "F" terminal (the black wire) and the #7 wire on the PCM connection. It should be less than 5 ohms. If it is not, then there is a wiring problem between the ICM and the PCM.

The coils are one of many possibilities that could cause a miss at idle, but it'* generally not the most common. Vacuum leaks are more common of a cause. I believe that there was also an update for the PCM programming to adjust the injector pulse at idle to smooth it out.
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Old 04-29-2007, 10:01 PM   #59
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Quote:
Originally Posted by Archon
The voltage you measured is too low, and shouldn't be varying if the engine isn't being cranked. This is the diagram for the connection on the ICM
ICM
Measure the resistance between the "F" terminal (the black wire) and the #7 wire on the PCM connection. It should be less than 5 ohms. If it is not, then there is a wiring problem between the ICM and the PCM.

The coils are one of many possibilities that could cause a miss at idle, but it'* generally not the most common. Vacuum leaks are more common of a cause. I believe that there was also an update for the PCM programming to adjust the injector pulse at idle to smooth it out.
Ok, when I do this do I disconnect the icm to check from the very tip F terminal and should I do the same with the #7 wire from pcm also ignition on or off?
And thanks again.
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Old 04-29-2007, 10:19 PM   #60
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Yes, have both ends disconnected, ignition off.
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