Re: {Chrysler 300} Re: 300B Stumbling at 60+ MPH

[Justin I <captjj28@xxxxxxxxxxx>]

I am still having the opposite problem: stumbling with throttle input from any speed. Distributor/timing, fuel... all gone over.  Wondering if it could be slack in timing chain... ?  Maybe the harmonic balancer has slipped and is no longer reading accurate time, but runs nice once the stumbling clears.

Hard starts when warm, but I think that's just heat soak; not necessarily a related issue.

-Justin

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From: chrysler-300-club-international@xxxxxxxxxxxxxxxx <chrysler-300-club-international@xxxxxxxxxxxxxxxx> on behalf of ridgleyracing65 <ridgleyracing65@xxxxxxxxx>
Sent: Sunday, August 6, 2023 6:46 PM
To: Chrysler 300 Club International <chrysler-300-club-international@xxxxxxxxxxxxxxxx>
Subject: Re: {Chrysler 300} Re: 300B Stumbling at 60+ MPH

 

Brian:

If you know the exhaust is good, then I am back with the other members pointing toward a fuel supply issue.

Dyke Ridgley

On Sunday, August 6, 2023 at 5:08:56 PM UTC-5 bwalk05 wrote:

Hi Dyke 

The exhaust & mufflers were some of the first things I replaced. So both are brand new.

Thanks,

Brian

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From: chrysler-300-cl...@xxxxxxxxxxxxxxxx <chrysler-300-cl...@xxxxxxxxxxxxxxxx> on behalf of ridgleyracing65 <ridgley...@xxxxxxxxx>
Sent: Sunday, August 6, 2023 2:44:39 PM

To: Chrysler 300 Club International <chrysler-300-cl...@xxxxxxxxxxxxxxxx>

Subject: {Chrysler 300} Re: 300B Stumbling at 60+ MPH

This has all the indications of a partially plugged exhaust system. How old is the exhaust and mufflers? Car idles and runs great up to the point the exhaust restriction just stops the performance. I have seen this exact same thing before.

Dyke Ridgley

On Saturday, August 5, 2023 at 11:15:03 AM UTC-5 bwalk05 wrote:

Hello Everyone,

Anyone have any suggestions for troubleshooting Carter adjustments (or otherwise) for a car that stumbles beyond 60 mph.  It starts up fine, idles smooth, accelerates strong up to 60 mph and then stumbles...even at fully open throttle.  

I suspect there is an accelerator pump issue or secondary is not opening under vacuum.  Any thoughts/suggestions would be greatly appreciated!

Thanks,

Brian W.

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