Bucking, chugging, and jumping???

Topics Last Day Last Week Tree View    Getting Started Formatting Troubleshooting Program Credits    New Messages Keyword Search Contact Moderators Edit Profile Administration
Model T Ford Forum: Forum 2012: Bucking, chugging, and jumping???
Top of pagePrevious messageNext messageBottom of page Link to this message  By Don Sandberg on Wednesday, September 05, 2012 - 06:43 pm:

That's what the 23 is doing in "high" gear, New timer, timed correct, cleaned coil box and reset all four coils and carb seems to ok, as refurbished about a month ago. Plugs a bit carboned up but believe to be ok. However, running a bit rough at idle it runs quite well in low but when releasing the "clutch" pedal to get to high it bucks, chugs and jumps down the road. not a good thing. Kevlar bands about 600 miles on them and when they were new it was recommended I pour a quart of ATF in crankcase. Could that help. It is a real nasty problem, Thanks Don


Top of pagePrevious messageNext messageBottom of page Link to this message  By Allan Richard Bennett on Wednesday, September 05, 2012 - 06:51 pm:

Don, in high gear you will be back at the low revs like idling, where you say it runs roughly. With the load on in high gear, that rough running will be exaggerated with the bucking you are experiencing. I would be looking to fix the rough idling problem first.

In high gear, the bands are not in use, so they will have no influence in rough running etc.

Hope this helps.

Allan from down under.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Kerry van Ekeren (Australia) on Wednesday, September 05, 2012 - 07:57 pm:

The one thing I can think of to cover both problems with one fault, would be a very worn throttle butterfly shaft in the carby and the linkages.


Top of pagePrevious messageNext messageBottom of page Link to this message  By keith g barrier on Wednesday, September 05, 2012 - 08:03 pm:

Don, you said "reset all four coils" were they done on a HCCT or strobospark? Just curious, 90% of carb problems on a T are electrical. KB


Top of pagePrevious messageNext messageBottom of page Link to this message  By Bob Jablonski on Wednesday, September 05, 2012 - 08:16 pm:

Retard the spark to 4 notches, as the engine speeds up in low pedal advance the spark. At the moment of going into direct drive, retard the spark about half to pick up the load easily, then advance the spark as the engine increases rpm's.

Think of the spark lever being advanced as the engine increases in rpm's. The change into direct drive just about halves the rpm's in low pedal so the spark has to be retared about half to elimimate the problem you're experiencing.


Bob Jablonski


Top of pagePrevious messageNext messageBottom of page Link to this message  By Don Sandberg on Wednesday, September 05, 2012 - 08:23 pm:

Keith: Not sure what a HCCT is but the President of our local T club is quite knowledgeable. He uses a older crank type coil tester which he believes is quite accurate. Please explain how carb problems are 90% electrical? I don't doubt your word I just don't understand. Thanks for the comeback


Top of pagePrevious messageNext messageBottom of page Link to this message  By keith g barrier on Wednesday, September 05, 2012 - 09:27 pm:

Don HCCT is hand cranked coil tester, the 90% thing I was told a long time ago as people have a habbit of blaming the carb when lots of times the problem will be a carbon track in the coil box or a grounded wire on the commutator. Carbs don't normally give a lot of trouble, especially if running a kingston. Have fun, KB


Posting is currently disabled in this topic. Contact your discussion moderator for more information.
Topics Last Day Last Week Tree View    Getting Started Formatting Troubleshooting Program Credits    New Messages Keyword Search Contact Moderators Edit Profile Administration