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Old 08-21-2006, 02:20 PM
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1979 corvette ignition problems

I have a 79 Corvette when started will run for about four minutes then stop as if the ignition was turned off. It will start again but run for a short time then stop as before. I have rebuilt the HEI, coil, condenser, rotor, cap electronic module. The old parts were apparently alright same results with them. I replaced fuel pump with electric one with pressure regulator and gauge holds good pressure. Still stops. Checked fuel filter, was clean. Installed new plugs replaced carb with rebuilt one (twice) still stops. Wiring is next stop any suggestions?

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Old 08-21-2006, 04:18 PM
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1 Stop buying parts until you know what is wrong.
2 Monitor the spark and fuel to see which is going away (my guess is fuel)
3 Connect a fuel pressure gauge at the carb and run it and monitor it when it
dies. Could be a plugged filter, plugged pickup in the tank or a pinched line
4 If it looses spark it could be the module but usually they take a while to
cool down in order to restart.
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Old 08-21-2006, 06:28 PM
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Doc here,

Run a Jumper straight from the battery, to the BATT terminal on the HEI..and run it , see if it stays running..

If so you have a problem Between the Ignition Switch and the Dizzy..(most common is the column Harness.)

If it runs then dies I'd look at fuel..

WHERE is the fuel pump connected? Does it have a proper relay and fuse and a well bonded ground?

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