Another thing easily checked is your vacuum advance. As you say this happens with throttle input, that’s when you get vacuum change. First put a vacuum gauge on the line from the carb and see that the vacuum changes when the engine is revved. Then apply a had held vacuum pump to the canister and watch for proper timing change as the vacuum increases. I know you said the distributor was gone over but a sticking vacuum advance will give those sorts of symptoms.
Best of luck.
Henry
From: chrysler-300-club-international@xxxxxxxxxxxxxxxx [mailto:chrysler-300-club-international@xxxxxxxxxxxxxxxx]
On Behalf Of John Grady
Sent: Friday, 11 August 2023 11:08 PM
To: John Cote
Cc: Justin I; ridgleyracing65; Chrysler 300 Club International
Subject: Re: {Chrysler 300} Re: 300B Stumbling at 60+ MPH
really good suggestion ! I forgot about all that . new ones are truly junk if they have a black robber cone on end , a stamped in X or stamped line on other end . It is supposed to hold aluminum foil against the aluminum case inside by pressing in . The design is a sad brutally incompetent joke. Gets intermittent contact due to aluminum oxide .You can’t touch aluminum together and expect a connection Skip , poor running comes and goes . Hard start etc .
This drove me crazy for years , finally one day I had exact same issue on Kohler flat twin emergency plant , sometimes no start . . After cutting one open —— that one day it tested good another day bad , (open) i saw where it had been arcing , not even sealed . I’d say good for under a year ,total junk .
I got so into it big time ; I mounted panasonic radio quality capacitors instead , .27 uF 630V as you can’t find good automotive ones .All about making it in China for 5 cents. The Panasonic are epoxy sealed , Japanese quality control . By the way , all interchange .
People routinely throw out really good old mopar hermetically sealed ones with the copper strap , replace with chinese junk with the rubber cone. Private branded , as part of “ tune up “
Check cap with highest scale ohmmeter analog , needle swings up settles at infinity it is good don’t change out as “ part of time up” unless bad .
I have never seen a bad mopar with copper strap ,or blue streak with strap either .
watch for them on ebay , I found 10 one time .
Failing to understand this leads to changing plug wires plugs and coil , each makes it better for a month , as spark is on edge weak (sometimes ) due to poor contact inside the cap
Sent from my iPhone
On Aug 11, 2023, at 8:25 AM, 'John Cote' via Chrysler 300 Club International <chrysler-300-club-international@xxxxxxxxxxxxxxxx> wrote:
Try changing just the condenser in distributor. Same symptoms you have. Worked for me and ran without stumbles after changing. Easy to try before going down rabbit hole. 🤔
Sent from my iPhone
On Aug 10, 2023, at 7:16 PM, Justin I <captjj28@xxxxxxxxxxx> wrote:
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
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,
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.
--
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-int...@xxxxxxxxxxxxxxxx.To view this discussion on the web visit https://groups.google.com/d/msgid/chrysler-300-club-international/97ea3b1c-7560-4037-a4cc-f2a2a456aea4n%40googlegroups.com.
--
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 on the web visit https://groups.google.com/d/msgid/chrysler-300-club-international/ec323f18-4796-4c5a-a587-5f36ca256de2n%40googlegroups.com.--
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 on the web visit https://groups.google.com/d/msgid/chrysler-300-club-international/DM4PR05MB94393507C0A95B238121ABB3C313A%40DM4PR05MB9439.namprd05.prod.outlook.com.--
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 on the web visit https://groups.google.com/d/msgid/chrysler-300-club-international/F738F5C2-AD14-445E-BEB5-3911957AD2FC%40aol.com.
--
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 on the web visit
https://groups.google.com/d/msgid/chrysler-300-club-international/5527736B-7F71-480A-86D0-E9EAC5B6EFD2%40gradyresearch.com.
Attachment:
20230811_163430.jpg
Description: 20230811_163430.jpg
Back to the Home of the Forward Look Network
Archive Sitemap
