number 1 and 2 cylinder plugs carboned up
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Topic author - Posts: 5
- Joined: Wed Nov 16, 2022 3:58 pm
- First Name: STEVEN
- Last Name: FALCK
- * REQUIRED* Type and Year of Model Ts owned: 1917 touring
- Location: North Fort Myers, FL
- MTFCA Number: 52204
- MTFCI Number: 25552
number 1 and 2 cylinder plugs carboned up
Motor seems to be missing and running rough. Number 1 and 2 plugs are carboned up with a little clean spot on tip of spark plug. Numbers 3 and 4 are super clean.
Is it a timer problem or coils or something else?
no trouble starting the car. Just does not sound correct.
Steve
Is it a timer problem or coils or something else?
no trouble starting the car. Just does not sound correct.
Steve
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- Posts: 6411
- Joined: Sun Feb 14, 2021 10:08 pm
- First Name: Pat
- Last Name: McNallen
- * REQUIRED* Type and Year of Model Ts owned: 1926-7 roadster
- Location: Graham, Texas
- MTFCA Number: 51486
- Board Member Since: 2021
Re: number 1 and 2 cylinder plugs carboned up
Not an uncommon problem. Several things could cause it, with a leaking manifold gasket being one.
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- Posts: 459
- Joined: Sun Jan 06, 2019 7:30 pm
- First Name: Mike
- Last Name: Kossor
- * REQUIRED* Type and Year of Model Ts owned: 1927 Touring
- Location: Kenilworth, NJ 07033
- MTFCI Number: 22706
Re: number 1 and 2 cylinder plugs carboned up
Optimal engine performance depends on many variables. Start/resolve with the easy ones and address all until the engine performs to your satisfaction.
Clean/gap plugs, Clean/replace timer, clean/replace coil points, properly tune coils for equal and consistent firing Time, run compression or leak down test on all cylinders to check valves for good/uniform compression. Good luck with your troubleshooting and repair.
Clean/gap plugs, Clean/replace timer, clean/replace coil points, properly tune coils for equal and consistent firing Time, run compression or leak down test on all cylinders to check valves for good/uniform compression. Good luck with your troubleshooting and repair.
I-Timer + ECCT Adjusted Coils = Best Model T Engine Performance Possible!
www.modeltitimer.com www.modeltecct.com
www.modeltitimer.com www.modeltecct.com
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- Posts: 6431
- Joined: Sun Jan 06, 2019 11:18 am
- First Name: Scott
- Last Name: Conger
- * REQUIRED* Type and Year of Model Ts owned: '13, '15, '19, '23
- Location: Clark, WY
- Board Member Since: 2005
Re: number 1 and 2 cylinder plugs carboned up
leaking manifold is almost always the problem
Scott Conger
Tyranny under the guise of law is still Tyranny
NH Full Flow Float Valves
Obsolete carburetor parts manufactured
Tyranny under the guise of law is still Tyranny
NH Full Flow Float Valves
Obsolete carburetor parts manufactured
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- Posts: 843
- Joined: Wed Jun 19, 2019 12:57 pm
- First Name: Art
- Last Name: Mirtes
- * REQUIRED* Type and Year of Model Ts owned: 1923 Touring
- Location: Huron, Ohio
- MTFCA Number: 32489
- MTFCI Number: 24068
- Board Member Since: 2016
Re: number 1 and 2 cylinder plugs carboned up
I was having trouble with #1 and #2 spark plugs getting very oily. After doing a lot of work that didn't solve the problem, i discovered that I was over filling the engine oil. I thought more is better. Reduced the oil level to just barely at the upper valve. The problem was solved.
Art Mirtes
Art Mirtes
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- Posts: 4072
- Joined: Tue Jan 08, 2019 1:39 pm
- First Name: Norman
- Last Name: Kling
- Location: Alpine California
Re: number 1 and 2 cylinder plugs carboned up
If the carbon is oily, you are burning oil, however if it is black you are running rich gas mixture. Since it is on 1 and 2 I would very much suspect that the intake manifold gasket has a leak on 3 and 4. Since they have the same port of the manifold. If it sucks in air at that point, the mixture needle is enriched to compensate for extra air going into 3 and 4. The manifold connection for 1 and 2 is normal, so when the mixture is enriched, those two cylinders run rich. The cure for this problem is new manifold gaskets. The ones with glands and copper rings seal the best if the surfaces of the manifold and block are clean. The exhaust manifold must also be straight so that the ports align with the ports on the block.
Norm
Norm
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- Posts: 1311
- Joined: Thu Jan 10, 2019 5:47 pm
- First Name: Les
- Last Name: Schubert
- * REQUIRED* Type and Year of Model Ts owned: 27 roadster 13 touring
- Location: Calgary
Re: number 1 and 2 cylinder plugs carboned up
#4 cylinder runs considerably hotter than #1.
#3 runs hotter than #2. This is the reality of the engine cooling system.
#3 runs hotter than #2. This is the reality of the engine cooling system.
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- Posts: 1436
- Joined: Tue Jan 08, 2019 12:22 am
- First Name: craig
- Last Name: leach
- * REQUIRED* Type and Year of Model Ts owned: 1919 Firetruck/1922 Speedster
- Location: Laveen Az
- MTFCA Number: 26647
Re: number 1 and 2 cylinder plugs carboned up
Hi Steven,
One thing at a time. Start & warm up the engine. Adjust the mixture to to as lean as it will run good, get a fire extinguisher, then spray a
flammable substance on the intake manifold making sure not to let it get close to the carb inlet. If the RPM comes up then it's a good
chance you have a intake manifold leak. If not swap #1 & 2 coils with # 3 & 4 and see if the issue fallows the coils. Try the same with
the plugs. If not look at the timer if you don't find a issue there then it's time for a compression test. Because of the 1-2-4-3 firing order
of a T many things effecting # 1 or #2 or #4 & # 3 will cause a miss in the next cylinder.
Good luck.
Craig.
One thing at a time. Start & warm up the engine. Adjust the mixture to to as lean as it will run good, get a fire extinguisher, then spray a
flammable substance on the intake manifold making sure not to let it get close to the carb inlet. If the RPM comes up then it's a good
chance you have a intake manifold leak. If not swap #1 & 2 coils with # 3 & 4 and see if the issue fallows the coils. Try the same with
the plugs. If not look at the timer if you don't find a issue there then it's time for a compression test. Because of the 1-2-4-3 firing order
of a T many things effecting # 1 or #2 or #4 & # 3 will cause a miss in the next cylinder.
Good luck.
Craig.
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- Posts: 203
- Joined: Mon Jan 07, 2019 2:41 pm
- First Name: Anthonie
- Last Name: Boer
- * REQUIRED* Type and Year of Model Ts owned: 1912 touring 1923 roadster 1925 pickup
- Location: Klaaswaal NL
- MTFCA Number: 19790
Re: number 1 and 2 cylinder plugs carboned up
The problem with # 1 and # 2 is already in the Book :
The Model T FordOwner by Murray Fahnesstock 1921 .
pag.303-305 .
Toon
The Model T FordOwner by Murray Fahnesstock 1921 .
pag.303-305 .
Toon