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Old 07-24-2012, 12:36 PM
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Jeep wrangler with a 5.7 chevy

I have a 1991 jeep wrangler that had a 4 cyl. I installed a 350 brand new HEI dis. The jeep runs great with the exception that it is hard to start? The engine will only fire when the ignition is released? I used the jeep wire harness and can not trace the correct wires to use. Any suggestions would truly be helpful.

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Old 07-24-2012, 01:50 PM
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my guess

The ignition switch is not supplying power to the HEI during cranking.
Is the new 350 a computer controlled engine? More detail would be nice.
The HEI must have power during cranking. Put a meter on it to check.
I'm guessing that you could change the ignition switch so power is supplied to the HEI during cranking.

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Old 07-24-2012, 04:01 PM
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Thanks for the reply. No computer, just old school. Holley 650 Vortex heads, comp cam
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Old 07-24-2012, 06:50 PM
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If the starter has a terminal marked with an "I" then hook that to the HEI along with the existing power wire. The "I" terminal is hot when cranking the engine.
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Old 08-06-2012, 02:42 AM
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GM/Jeep

Adding the wire to the "I" terminal worked like a charm.

Thank you
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