Thread: Motor Backfires Thru Exhaust When Trying To Start
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Old 10-10-2019, 09:17 PM
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Jim Coleman Jim Coleman is offline
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Location: Waco, TX
Cobra Make, Engine: 1980 Arntz, 350 'Vette & Muncie, & Jag rear
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Read this online, I think this is where the problem is - I took it apart: When you install a cam or timing chain.. You install it so dot is over dot Cam gear dot at 6:00, crank gear at 12:00 This is NOT the correct placement for ignition timing.. This puts #6 piston at TDC compression stroke. You would need to rotate crank 360*, to get #1 on compression stroke.. Now the crank gear dot will be at 12:00 again, but cam turns at half the speed of crank, so cam gear will be a 12:00 now as well This is where you can set ignition timing now

Is this correct? Excuse my ignorance on this, I just don't know how to do it. Does this mean it turns over twice to get to 360 degrees? Clockwise?

Thanks,

Jim
Last edited by Jim Coleman; 10-10-2019 at 09:49 PM..
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