81' won't start-need some help
05-28-2008, 06:48 PM
#1
Le Mans Master
Thread Starter
81' won't start-need some help
My friends 81' won't start after sitting over the winter. It has 12V to the cap with the key on. Repaced all the ignition parts (module too) still won't start. No spark at plugs. Distributor rotates. Getting fuel. any suggestions on what to look at next? Starter solenoid? It cranks over fine.
05-28-2008, 06:59 PM
#2
Race Director
Doesnt the 81 need a signal from the computer to fire?
edit - actually I think Im wrong about that I think the ECM only controls the timing.
Be sure and check the rotor over real good as some of those fired through the rotor directly into the dist shaft.
edit - actually I think Im wrong about that I think the ECM only controls the timing.
Be sure and check the rotor over real good as some of those fired through the rotor directly into the dist shaft.
Last edited by ...Roger...; 05-28-2008 at 07:07 PM.
05-28-2008, 07:57 PM
#3
Drifting
Member Since: Dec 2007
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more then likely its this a friend had the same thing to his car
http://www.parts123.com/parts123/yb....Z5Z5Z50000050G
http://www.parts123.com/parts123/yb....Z5Z5Z50000050G
05-28-2008, 08:10 PM
#4
Le Mans Master
Take a plug wire off the cap and see if there's spark. Probably not from the description. take the cap off the distributor, leave it plugged in and crank- see if the coil is firing. If it does, replace the rotor and give it a shot. No fire, maybe the coil. Check the pickup coil- make sure the 2 little wires are good. You can check the coil with a meter- it plugs into the module.
05-29-2008, 09:04 AM
#5
Melting Slicks
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Possible codes....
1981 Corvette ECM Codes
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Code #12: No Distributor Reference Pulse.
Code #13: Oxygen Sensor Circuit.
Code #14: Shorted Coolant Sensor Circuit.
Code #15: Open Coolant Sensor Circuit.
Code #21: Throttle Position Sensor Circuit.
Code #23: Mixture Control Solenoid Circuit.
Code #24: Vehicle Speed Sensor Circuit:
Code #32: Baro Sensor Circuit Low.
Code #34: Vacuum Map Sensor Circuit.
Code #44: Oxygen Sensor Lean.
Code #45: Oxygen Sensor Rich.
Code #51: Faulty or Mis-Installed PROM
Code #52: Faulty ECM.
Code #53: Faulty ECM.
Code #54: Shorted Mixture Control Solenoid.
Code #55: Faulty Oxygen Sensor or ECM.
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