spark plug issue...
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New User
Joined: Oct 2010
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spark plug issue...
hey hey..im new to FTE..i have limited knowledge about the subject and was hoping i might be able to get some insight..i have a 66 f100 with the 240 inline 6 that used to be my great grandfathers..my issue is that after idling for a relatively short period of time the spark plugs keep recoating in black stuff which i take to be carbon deposit..after i clean them it'll start right back up till they get recoated again..can anyone tell me what might cause this problem or any possible remedies..
Other than that it runs pretty smooth. There's only 54,000 miles on the original motor..ive been slowly trying to reclaim the truck for use as funds allow..
Other than that it runs pretty smooth. There's only 54,000 miles on the original motor..ive been slowly trying to reclaim the truck for use as funds allow..
Junior User
Joined: Aug 2008
Posts: 73
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From: Vienna, VA
Some carbon deposits on your plugs is a normal thing, however excessive deposits mean a few things could be wrong. You may need to adjust the carb. Also, how old is the fuel? If it's been in the tank for a while, then it will gum up on the parts rather than burn off properly.
also, is it causing the truck to stall out? after it stalls, does it start again without cleaning the plugs?
also, is it causing the truck to stall out? after it stalls, does it start again without cleaning the plugs?
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New User
Joined: Oct 2010
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Some carbon deposits on your plugs is a normal thing, however excessive deposits mean a few things could be wrong. You may need to adjust the carb. Also, how old is the fuel? If it's been in the tank for a while, then it will gum up on the parts rather than burn off properly.
also, is it causing the truck to stall out? after it stalls, does it start again without cleaning the plugs?
also, is it causing the truck to stall out? after it stalls, does it start again without cleaning the plugs?
All the fuel is fresh..i have replaced the gas tank with a brand new one..the old one was rusted out..fuel lines are clean..the carb may be the only questionable piece..i have replaced it with a remanufactured one (single barrel, nothing special)..when i turn mixture screw nothing major really happens..the truck does not smoke any..it used to a little but virtually none anymore..
its not really causing the truck to stall until the plugs are just so coated that it cant spark..and then yes i do have to clean the plugs to fire it back up or else it wont start
another thing (im not sure if has much effect on it) i cant actually drive the truck..all the wheel cylinders are bad in the drums..so all i can do at this point is sit at idle, its not really drivable at this point
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the truck used to smoke a grayish color..not white and not really black..some dark gray if that makes sense..but i put some additives in it during an oil change and the smoking has virtually dissappeared at this point
Cargo Master
Joined: Oct 2005
Posts: 2,084
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From: Stanton, Michigan, USA
Drew,
WELCOME TO FTE!
Since you are unable to drive the truck at this point, I'd suggest you don't fret too much on the blackened sparkplugs for now.
Once you get the brakes back in operation and you can drive the truck and put the engine under a load, then you'll be better able to determine if your carb, or if anything, is out of adjustment. The plug blackening may just be the result of not being able to put the engine under a load - work it as it was designed to do.
Good Luck!
BarnieTrk
WELCOME TO FTE!
Since you are unable to drive the truck at this point, I'd suggest you don't fret too much on the blackened sparkplugs for now.
Once you get the brakes back in operation and you can drive the truck and put the engine under a load, then you'll be better able to determine if your carb, or if anything, is out of adjustment. The plug blackening may just be the result of not being able to put the engine under a load - work it as it was designed to do.
Good Luck!
BarnieTrk
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