HEI upgrade problems
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Freshman User
Joined: May 2014
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HEI upgrade problems
Okay guys, I replaced my old ignition with an HEI system, and after getting everything put together. It doesn't try to fire, and after you play with the timing it backfires through the exhaust. Also, it seems to be sitting crooked, is that normal? Any and all replies are appreciated. Need it fixed before the car show Friday though.
Posting Guru
Joined: Aug 2010
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From: Knoxville, TN
Why did you replace your old ignition system? Were you having problems there? I would differ with the term "upgrade" myself - the Duraspark design has some advantages from an engineering perspective - but regardless, what problem were you trying to solve by switching? Was it doing the same thing before?
"Sitting crooked" doesn't sound normal to me ... pics?
"Sitting crooked" doesn't sound normal to me ... pics?
New User
Joined: Jan 2015
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I just put one of these on my pick up. I wired it in with a 40 amp relay. That made it so I could run a bigger gauge wire to the dizzy and a bigger wire from the battery to the relay. Then used the wire that went to the old coil to turn on the relay. Worked great. Mine set into the intake manifold straight and didn't look crooked at all.
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Laughing Gas
Joined: Apr 2015
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It should be somewhere in the neighborhood of 6-12 degrees before TDC... Are you certain you are on number 1 at TDC?
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Laughing Gas
Joined: Apr 2015
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And, I almost always wire an HEI module into my old Duraspark trucks... I like having parts I can actually find lol.
Fleet Mechanic
Joined: Jun 2013
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I certainly disagree! The ignition system, alternator and regulator are comparable to a 80's Hyundai.. "doo doo"
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