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Re: backfiring

To: MonteMorris <>
Subject: Re: backfiring
From: Rocky Frisco <>
Date: Fri, 27 Jun 2003 16:25:18 -0500
MonteMorris wrote:
> I know, I know; "If it ain't broke, don't fix it", but I did anyway:-(.
> The car has been running real well (650 miles RT to St. Louis last weekend),
> but for the last several weeks I've been trying to "tweek" the timing on the
> 67B with points dizzy using the A-R adjustment knob. I knew it was somewhat
> off, even though it was running well. I used the timing light and it showed
> about 25 degrees advanced, so I backed it off to 20 degrees. I figured I'd
> better readjust the carbs to the new timing, so I did this, put in a new
> choke cable and set it back up, and checked the plugs and regapped them.
> Now the car is running like sh*t! It's backfiring upon deceleration and
> missing upon acceleration.
> What should I check first?

Check for rich mix. Pull on a tiny bit of choke; it should get much
worse if it's a rich mix. Other possibility is a wonky connection
somewhere in the ignition primary circuit, ground wire in distributor or
hot wire in distributor, bullet connectors, etc.

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