RE: {Chrysler 300} very odd engine issue on my 300K

I checked the plug wires, and they were – are on tight.

They only thing I changed was pulling off the carb and putting it back on as described. The weird non-linear throttle response is not something I would think electrical…

James

From: Jay Williamson <letterpressman@xxxxxxxxxx>
Sent: Saturday, February 22, 2025 5:43 PM
To: James Douglas <jdd@xxxxxxxxxx>
Cc: chrysler-300-club-international@xxxxxxxxxxxxxxxx
Subject: Re: {Chrysler 300} very odd engine issue on my 300K

Sounds like a fould plug or maybe a plug wire came off at the plug?

Sent from my iPad

On Feb 22, 2025, at 8:40 PM, 'James Douglas' via Chrysler 300 Club International <chrysler-300-club-international@xxxxxxxxxxxxxxxx> wrote:

Hi All,

After a short freeway run for 15 minutes, 70-75 MPH, then a mile or so on city streets we rolled into our place. In the driveway when I put it in neutral (or park) the engine started shaking good. In drive not so much. When I tried to pull it into the garage the throttle felt VERY odd like the carburetor was not responding linearly.

After it cooled down, I pulled the AFB and tore it down on the bench. I could find nothing wrong. I cleaned with carb cleaner, blew out the items one can blow out tightened all the screws on everything, some gave me a 1/8 to ¼ turn and put the entire thing back together. I then started it up and it now seems fine, although the car is idling differently, the feel of it. I took it out and ran it and came back and it still seems fine save for the “feeling” that the idle is different.

Very Very odd. I have no idea what happened. Anyone every have this kind of behavior on a single AFB?

I rebuilt this unit last year and checked everything. New jets, new NOS step up rods, new needle and seats, new vacuum pull off, new gaskets and the like.

Scratching my head.

James

PS. One reason I like the idea of throttle body EFI for a daily driver…less moving parts than an AFB.

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