What is more likely to cause popping on Decel, retarded or advanced timing?
08-04-2013, 07:12 AM
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Car: 86 Z28
Engine: 350
Transmission: W/C T-5
Axle/Gears: 9 BOLT 3.45 POSI
What is more likely to cause popping on Decel, retarded or advanced timing?
I am chasing a rumble/pop in the exhaust on decel, would either advanced or retarded timing on decel cause this cond? the only thing that seems to stop it was with the old computer controlled q jet and hei was when I unplug the 4 pin connector that you unplugged to adjust timing, if i left it un hooked it would not pop but also didn't run right power wise.
I now have a holley 650 dp and MSD Dist, it still does it but not as loud.
I now have a holley 650 dp and MSD Dist, it still does it but not as loud.
08-04-2013, 08:42 AM
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Re: What is more likely to cause popping on Decel, retarded or advanced timing?
Leaks in the exhaust system tend to be the biggest problem. On decel it allows fresh air to enter and cause the rich mixture to explode.
08-04-2013, 10:01 PM
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Car: 86 Z28
Engine: 350
Transmission: W/C T-5
Axle/Gears: 9 BOLT 3.45 POSI
Re: What is more likely to cause popping on Decel, retarded or advanced timing?
Exhaust is sealed tight, I used a Smoke machine to check this.
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