RE: {Chrysler 300} 300F Backfire thoughts?

[dplotkin <dplotkin@xxxxxxxxxxxxxxxxxxx>]

Lindsey,

Smarter folks will be along soon I'm sure. Until then I'll ask you is the backfire coming from under the hood or in back of the car? I ask because backfires from the carburetor are typically a lean fuel mixture and a carburetor or fuel system issue. On the other hand a backfire through the exhaust is generally indicative of a ignition problem. For example, crossed wires carbon tracking in cap. But the most common backfire through exhaust comes from crappy ignition condensers. John Grady can expound on that.

Sent from my Verizon, Samsung Galaxy smartphone

-------- Original message --------

From: Lindsey <lindsey@xxxxxxxxxxxxxxx>

Date: 7/28/24 10:24 PM (GMT-05:00)

To: chrysler 300 club <chrysler-300-club-international@xxxxxxxxxxxxxxxx>

Subject: {Chrysler 300} 300F Backfire thoughts?

Have hardly driven my F this year due to wet and nasty weather and waiting to get my brakes fixed properly. Finally took it for an hour or so city cruise last Sunday. After a slow crawl through a show and shine, i stopped at a red light. Accelerated medium throttle and heard a backfire, probably mine. 5 minutes later hit another red light and motor was shaking at idle. Obviously a cylinder not happy. Got home ok. Not able to bend down at moment to pull front wheels and access covers to get at plugs. No signs of arching on coil or distributor cap contacts that i could see. Cap for #1 cylinder had a bit of loose black stuff at bottom which cleaned up with a q tip. Took it out again and seemed fine, motor smooth, good moderate acceleration, no highway. Came to a stop sign on a remote road. Didn’t come to a full stop, then began accelerating modestly and a small backfire. The car has always run a bit rich since restoration i believe. Any thoughts before I get it to my out of town mechanic?
Thanks.
Lindsey in fires fire free Winnipeg

Sent from my iPad

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