Rough idle
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jonathan
Topic author - Posts: 38
- Joined: Mon Jan 14, 2019 2:51 pm
- First Name: jonathan
- Last Name: Delancey
- * REQUIRED* Type and Year of Model Ts owned: 1919 Roadster
- Location: Easton PA
Rough idle
The 1919 roadster runs great, pulls hills no problem. Now for some reason, it idles rough. What to check first? It has a new Anderson timer and rebuilt coils.
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Plankhill
- Posts: 123
- Joined: Sun Jan 06, 2019 8:04 pm
- First Name: Brendan
- Last Name: Doughty
- * REQUIRED* Type and Year of Model Ts owned: 16 , 21, 24, Touring , 24 Roadster, 26 Speedster
- Location: Central Wisconsin
- MTFCA Number: 15143
Re: Rough idle
What kind of carb?
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Jerry VanOoteghem
- Posts: 3001
- Joined: Sun Jan 06, 2019 4:06 pm
- First Name: Jerry
- Last Name: Van
- Location: S.E. Michigan
- MTFCA Number: 24868
Re: Rough idle
I had that problem when using Autolite or Champion* spark plugs.
*The modern style, not the old style take-apart plugs.
*The modern style, not the old style take-apart plugs.
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John Warren
- Posts: 1069
- Joined: Sun Jan 06, 2019 12:18 pm
- First Name: John
- Last Name: Warren
- * REQUIRED* Type and Year of Model Ts owned: 14 Roadster, 25 Pickup , 26 Canadian Touring , and a 24-28 TA race car
- Location: Henderson, Nevada
Re: Rough idle
I agree with Jerry, and or it could be something to do with your coils, sometimes caused by being loose in the box. You can shim them a little tighter with a Popsicle stick.
24-28 TA race car, 26 Canadian touring, 25 Roadster pickup, 14 Roadster, and 11AB Maxwell runabout
Keep it simple and keep a good junk pile if you want to invent something
Keep it simple and keep a good junk pile if you want to invent something
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John Warren
- Posts: 1069
- Joined: Sun Jan 06, 2019 12:18 pm
- First Name: John
- Last Name: Warren
- * REQUIRED* Type and Year of Model Ts owned: 14 Roadster, 25 Pickup , 26 Canadian Touring , and a 24-28 TA race car
- Location: Henderson, Nevada
Re: Rough idle
I forgot to ask, battery of magneto? If on Mag, classic symptoms.
24-28 TA race car, 26 Canadian touring, 25 Roadster pickup, 14 Roadster, and 11AB Maxwell runabout
Keep it simple and keep a good junk pile if you want to invent something
Keep it simple and keep a good junk pile if you want to invent something
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John kuehn
- Posts: 3923
- Joined: Sun Jan 06, 2019 8:00 pm
- First Name: John
- Last Name: Kuehn
- * REQUIRED* Type and Year of Model Ts owned: 19 Roadster, 21 Touring, 24 Coupe
- Location: Texas
- MTFCA Number: 28924
Re: Rough idle
Did it have a rough idle before the new coils and Anderson timer? All the connections tight going to the coil box from the plugs? I had an occasional miss on my 24 and checked and rechecked until I found the barely loose plug wire to the coil box.
I checked all the harder things over and over and overlooked the simple!
I checked all the harder things over and over and overlooked the simple!
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Dave S
- Posts: 83
- Joined: Wed Jan 09, 2019 10:08 pm
- First Name: David
- Last Name: Simmering
- * REQUIRED* Type and Year of Model Ts owned: 1911 Touring, 1925 Coupe, 1926 Roadster Pickup
- Location: Afton, TN
- MTFCA Number: 11531
- MTFCI Number: 10138
Re: Rough idle
Ensure that Anderson is firing at 0,90,180, and 270 degrees. I had one that was 7 degrees off at 180 and 4 at 90.
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jonathan
Topic author - Posts: 38
- Joined: Mon Jan 14, 2019 2:51 pm
- First Name: jonathan
- Last Name: Delancey
- * REQUIRED* Type and Year of Model Ts owned: 1919 Roadster
- Location: Easton PA
Re: Rough idle
It ran great with the new timer and rebuilt coils for the last thousand miles, now idles rough but runs great under load.
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John kuehn
- Posts: 3923
- Joined: Sun Jan 06, 2019 8:00 pm
- First Name: John
- Last Name: Kuehn
- * REQUIRED* Type and Year of Model Ts owned: 19 Roadster, 21 Touring, 24 Coupe
- Location: Texas
- MTFCA Number: 28924
Re: Rough idle
Put some Motorcraft or Autolite new plugs in it. Their inexpensive and see what’s happens.
I have I have Motorcraft in mine and it runs fine but all T’s are a little different. Champion X’s are fine for some but for others other brands work better. Everybody has their preference. That would be the cheapest thing to try next unless in could something in the timer.
Maybe try changing the coils position in the coil box. If it runs smoother it could be one of the plugs. Anything is possible with a T.
I have I have Motorcraft in mine and it runs fine but all T’s are a little different. Champion X’s are fine for some but for others other brands work better. Everybody has their preference. That would be the cheapest thing to try next unless in could something in the timer.
Maybe try changing the coils position in the coil box. If it runs smoother it could be one of the plugs. Anything is possible with a T.