.. between the brake booster and the wiper motor. Tan/brown with a black stripe
ESC wire sorry
Thread Starter
Drifting
Joined: Feb 2013
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ESC wire sorry
hello
I have a 1984 4plus3 stock corvette.
I was checking my timing and disconnected what I thought was the Electronic Spark Control wire. When I disconnected the wire the Tach went shut off and the CEL did not come on. Did I disconnect the wrong wire. The wire I disconnected is yellow or white and goes through a filter or condensor.
If I did disconnect the correct wire, why did the CEL not come on?
Thank you,
Joe
and if you know how to post a picture please tell me.
I have a 1984 4plus3 stock corvette.
I was checking my timing and disconnected what I thought was the Electronic Spark Control wire. When I disconnected the wire the Tach went shut off and the CEL did not come on. Did I disconnect the wrong wire. The wire I disconnected is yellow or white and goes through a filter or condensor.
If I did disconnect the correct wire, why did the CEL not come on?
Thank you,
Joe
and if you know how to post a picture please tell me.
Thread Starter
Drifting
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Melting Slicks
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From: WAY UPSTATE NY
Burning Brakes
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From: That one city...you know that one. Idaho
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Drifting
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Race Director
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From: Anaheim CA
Lets go nuts with acronyms... ;-)
ECM is Electronic Control Module -- also sometimes called Engine Control Module. Later cars have PCMs (Powertrain Control Module) -- same thing, different name.
ESC is Electronic Spark Control -- that's the spark timing retarding done by the ECM in response to signals from the knock sensor and knock sensor module (called ESC module).
EST is Electronic Spark Timing -- that's the spark timing that the ECM adjusts to match the engine operating conditions.
The tach signal from the distributor is connected to the dashboard. The ECM uses pulses from the ICM (Ignition Control Module) in the distributor to determine RPM. It's a completely separate signal.
ECM is Electronic Control Module -- also sometimes called Engine Control Module. Later cars have PCMs (Powertrain Control Module) -- same thing, different name.
ESC is Electronic Spark Control -- that's the spark timing retarding done by the ECM in response to signals from the knock sensor and knock sensor module (called ESC module).
EST is Electronic Spark Timing -- that's the spark timing that the ECM adjusts to match the engine operating conditions.
The tach signal from the distributor is connected to the dashboard. The ECM uses pulses from the ICM (Ignition Control Module) in the distributor to determine RPM. It's a completely separate signal.
Last edited by Cliff Harris; Aug 17, 2013 at 01:10 AM. Reason: Added PCM note.
Melting Slicks
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From: WAY UPSTATE NY
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Drifting
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Drifting
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The engine has good compression. All of the cylinders had about 200 psi when I did the compression test. So I am assuming that it is in good condition. Only has 72 K on it. Just trying to figure where it can leak. Can the EGR system cause vacuum problems?
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