Given the freeway run, sounds like your advance weights or vacuum advance is sticking. Put a timing light on it if it happens again to test. Henry From: chrysler-300-club-international@xxxxxxxxxxxxxxxx <chrysler-300-club-international@xxxxxxxxxxxxxxxx> On Behalf Of dplotkin Here's why I asked. My 63 Galaxie with a 390 began acting up. Idle dropped and surged. High speed operation was fine. I hadn't been in the carb since I installed it 21 years ago. And with all the talk of alcohol-laced fuel varnish and so forth I immediately concluded that I had a carb full of mung. When I pulled apart the 21-year-old Holly it was brand new inside. I had a leaking accelerator pump and there were some loose screws but on balance the carburetor was fine. Under the distributor cap was a different story. The contact set rubbing block was warned to nothing and the points were closed up. Fresh set of points new cap and rotor well set to 30° timing rechecked and the car runs like new once again. Sometimes we can forget these are old cars and in the old days we tune them up at least once a year. I hadn't touched that Ford in 20 years. Danny Plotkin Sent from my Verizon, Samsung Galaxy smartphone -------- Original message -------- From: 'James Douglas' via Chrysler 300 Club International <chrysler-300-club-international@xxxxxxxxxxxxxxxx> Date: 2/23/25 8:54 AM (GMT-05:00) Subject: RE: {Chrysler 300} very odd engine issue on my 300K Danny, It did not have a cyclic rate to the problem I usually associate with ignition. Also, I am using an electric orange box dizzy… When I put the carb back on the problem went mostly away. I did not touch anything else. So I think it is something in the carb. I guess I will have to run it for a few days and see how she runs. James From: chrysler-300-club-international@xxxxxxxxxxxxxxxx <chrysler-300-club-international@xxxxxxxxxxxxxxxx> On Behalf Of dplotkin Most problems like this are ignition related, especially given the AFB a mighty trouble free carburetor. Why the immediate condemnation of the carb? Danny Plotkin Sent from my Verizon, Samsung Galaxy smartphone -------- Original message -------- From: 'James Douglas' via Chrysler 300 Club International <chrysler-300-club-international@xxxxxxxxxxxxxxxx> Date: 2/22/25 8:40 PM (GMT-05:00) Subject: {Chrysler 300} very odd engine issue on my 300K 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. -- -- -- -- For archives go to http://www.forwardlook.net/300-archive/search.htm#querylang --- You received this message because you are subscribed to the Google Groups "Chrysler 300 Club International" group. To unsubscribe from this group and stop receiving emails from it, send an email to chrysler-300-club-international+unsubscribe@xxxxxxxxxxxxxxxx. To view this discussion visit https://groups.google.com/d/msgid/chrysler-300-club-international/003501db8602%246cc22140%24464663c0%24%40optusnet.com.au. |
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