|
Sponsored Links (Register now to hide all advertisements) |
|
|
Thread Tools | Display Modes |
04-17-2021, 05:44 AM | #41 |
Senior Member
Join Date: Dec 2020
Location: Central Wisconsin
Posts: 105
|
Re: Engine stumbles on acceleration
I installed the original cap, set the timing with the Nu Rex wrench and then swapped the old cap for the modern cap. Do you see anything wrong with doing it that way?
|
04-17-2021, 01:26 PM | #42 |
Senior Member
Join Date: May 2017
Location: Denver Area
Posts: 433
|
Re: Engine stumbles on acceleration
It sounds logical but I dont' know if the spark plug locations in the modern cap are in the same locations. If the modern cap has different clocking relative to the tab that engages the distributor body, your timing will be different. Can you check it with a timing light? I forget if you said that you had done that.
|
Sponsored Links (Register now to hide all advertisements) |
|
04-17-2021, 03:21 PM | #43 |
Senior Member
Join Date: Dec 2020
Location: Central Wisconsin
Posts: 105
|
Re: Engine stumbles on acceleration
I haven’t checked the timing with a timing light. I’ll do that and check back here.
|
04-17-2021, 03:33 PM | #44 |
Senior Member
Join Date: Jan 2015
Location: San Jose California
Posts: 150
|
Re: Engine stumbles on acceleration
If you a vacuum wiper motor check it and the hose for possible leaks.
|
04-17-2021, 09:37 PM | #45 | |
Senior Member
Join Date: Mar 2015
Location: Greenville, SC
Posts: 1,099
|
Re: Engine stumbles on acceleration
Quote:
John |
|
04-18-2021, 07:11 AM | #46 |
Senior Member
Join Date: Dec 2020
Location: Central Wisconsin
Posts: 105
|
Re: Engine stumbles on acceleration
Sponsored Links (Register now to hide all advertisements)
Thanks for the ideas. |
04-19-2021, 08:10 AM | #47 |
Senior Member
Join Date: May 2017
Location: Denver Area
Posts: 433
|
Re: Engine stumbles on acceleration
I had another idea on the timing if you are having trouble setting up a timing light. I know it is a pain the first time because there is no mark on the pulley or pointer to go by.
Set the timing using the NuRex wrench and the original style cap, then keep the original style cap in place when you run it and see if that fixes the hesitation. Then you know it is a difference in the two distributor caps. |
04-19-2021, 08:13 AM | #48 |
Senior Member
Join Date: Dec 2020
Location: Central Wisconsin
Posts: 105
|
Re: Engine stumbles on acceleration
Another good idea. Thanks. I'll try that!
|
04-19-2021, 05:47 PM | #49 |
Senior Member
Join Date: Apr 2021
Location: Central Illinois
Posts: 491
|
Re: Engine stumbles on acceleration
Nice thread. Timing is right for me. Thx.
|
04-24-2021, 08:54 AM | #50 |
Senior Member
Join Date: Dec 2020
Location: Central Wisconsin
Posts: 105
|
Re: Engine stumbles on acceleration
Yesterday I changed the plug wires from resistor to solid core. It made a significant difference in the way it ran. Cleared the stumbling 90%. I compared the old distributor cap with the new modern cap. They are virtually identical. I checked for air leaks around the intake manifold. That’s all good. I used the unlit propane torch method. I did put an extension on the carb intake to make sure I wasn’t sucking any propane into the carb. Today I’m going to remove the fuel filter and check the timing with a timing light. I did a vacuum gauge check and the gauge reads between 18-21 inches of vacuum. A little bouncy! I still can’t get it to idle low enough. That causes gear shifting problems. A low enough idle causes it to want to die when coming to a stop. More testing to come. I may have to take the plunge and buy a new carb.
|
04-26-2021, 07:20 AM | #51 |
Senior Member
Join Date: Dec 2020
Location: Central Wisconsin
Posts: 105
|
Re: Engine stumbles on acceleration
I changed the fuel line to remove the filter. No change in the way it runs. I made a timing pointer (photo attached) to check the timing. Timing was right on. Looks like it's time to buy a another carb!
|
04-28-2021, 02:11 PM | #52 |
Junior Member
Join Date: Apr 2021
Posts: 11
|
Re: Engine stumbles on acceleration
Hello all,
New member here. Looking forward to learning a lot from you all. |
05-10-2021, 08:16 AM | #53 |
Senior Member
Join Date: Dec 2020
Location: Central Wisconsin
Posts: 105
|
Re: Engine stumbles on acceleration
So, i completed all the things discussed in the above posts except the carb replacement.
The car runs 90% better than it did before. No more backfiring. The two things that made the biggest difference were verifying the timing was correct and changing from reistor plug wires to solid core wires. The addition of the timing pointer was a big help. I cut a small notch in the crank pulley with my Dremel grinder and put some silver paint on it. See attached photo |
05-10-2021, 09:34 AM | #54 | ||
Senior Member
Join Date: Jul 2011
Location: Redondo Beach, CA
Posts: 5,849
|
Re: Engine stumbles on acceleration
Quote:
Quote:
|
||
05-10-2021, 10:30 AM | #55 |
Senior Member
Join Date: Jun 2015
Location: Red Deer, Alberta
Posts: 5,046
|
Re: Engine stumbles on acceleration
What spark plugs did you use? What did you gap them at?
__________________
If you don't hear a rumor by 10 AM, start one!. Got my education out behind the barn! |
05-10-2021, 04:18 PM | #56 |
Senior Member
Join Date: Dec 2020
Location: Central Wisconsin
Posts: 105
|
Re: Engine stumbles on acceleration
.035 and Champion plugs, if I remember.
|
05-10-2021, 07:15 PM | #57 |
Senior Member
Join Date: May 2010
Location: Moncks Corner, SC
Posts: 439
|
Re: Engine stumbles on acceleration
My sometimes does stumble on accel. I adjust the GAV to let more gas in. Cures the stumble.
|
05-11-2021, 09:58 AM | #58 |
Senior Member
Join Date: Dec 2020
Location: Central Wisconsin
Posts: 105
|
Re: Engine stumbles on acceleration
I tried that. It didn't seem to help much. The A runs pretty good now. As good as you would expect a 90 year old car to run!!!
Thank you all for all your help. Motor on! |
05-11-2021, 11:10 AM | #59 |
Senior Member
Join Date: May 2010
Posts: 426
|
Re: Engine stumbles on acceleration
Set your plugs to .025 on a 6v system - try that. .035 is pretty wide.
|
05-12-2021, 05:48 AM | #60 |
Senior Member
Join Date: Dec 2020
Location: Central Wisconsin
Posts: 105
|
Re: Engine stumbles on acceleration
I’ll try that.
|
|
|
Sponsored Links (Register now to hide all advertisements) |
|