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Old 04-13-2004, 08:06 PM   #1
lunatic987
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SP Gap and problems it can cause

What kind of problems can be caused by having a spark plug gap that is a full .01 inches above spec?
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Old 04-13-2004, 08:15 PM   #2
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Slight power loss. Don't let your average saturday redneck tell you gapping your plugs more is better. Trust me, when cars are engineered they spend a lot of time getting the specs on the gaps right.
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Old 04-13-2004, 11:08 PM   #3
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I saw a plug come out of a car that the gap had increased by that much and was wondering what problems that keeping that in the car would/could cause.
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Old 04-14-2004, 12:02 AM   #4
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A bigger gap than specs call for cools down your spark which inturn doesn't ignite your fuel as well causing a power loss. .01 is not much of a difference though.

Quote:
I saw a plug come out of a car that the gap had increased by that much



Just one plug had that .01 bigger gap out of all of them? That's kinda weird
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Old 04-14-2004, 02:12 AM   #5
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actually I think the one plug was actually more of .011

2 other plugs were .005 different and the 4th was .003


nice wide range. the car was also idling rough and stalling but only when hot...

I believe the first spark plug, with the .011 difference, also reeked of gas, even hours later...

I was just posting to maybe find out what else a difference like that would cause. I read somewhere normal should be about every 10,000 miles it will increase about .001. I think it has just over 60,000 on it.
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Old 04-14-2004, 05:44 AM   #6
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Quote:
Originally Posted by DodgeRida67
Slight power loss. Don't let your average saturday redneck tell you gapping your plugs more is better. Trust me, when cars are engineered they spend a lot of time getting the specs on the gaps right.


Quote:
Originally Posted by DodgeRida67
A bigger gap than specs call for cools down your spark which inturn doesn't ignite your fuel as well causing a power loss. .01 is not much of a difference though.
Everytime you almost stop before you make a fool of yourself, but then...

Excessive gap does not "cool" the spark because the spark is not there to cause heat. Too much gap will prevent or cause a weak spark due to insufficient voltage which will cause a power loss.

As for your assertion that .010" extra gap isn't that much, for some engines that is 30%+ more than the proper gap. In my book that's alot. I should also point out that for every extra .010" gap, you need about 10-15k more volts from your secondary ignition to fire. That is a butt load in anybody's book.
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Old 04-14-2004, 02:01 PM   #7
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Quote:
Excessive gap does not "cool" the spark because the spark is not there to cause heat.




On a serious note, this should go in the thread called "dumbest thing someone ever said to you"(or something like that)

A spark ignites gasoline from the heat it generates. Not just for being a spark.
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Old 04-14-2004, 02:41 PM   #8
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A spark ignites gasoline from the heat it generatesNot just for being a spark


So what your saying is that if I heat up gas with an electric element heating with no flame that the gas will burn? Gee, I always thought you needed a spark or some sort of burning action.

Your right, what you said should go into the "dumbest things ever said".

If you missed vwhobo's point, and it's obvious you did, he was saying that due to the excessive gap, no spark would occure (not enough electical potential energy to jump the gap), and therefore due to no spark there would be no heat.
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Old 04-14-2004, 07:06 PM   #9
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Quote:
So what your saying is that if I heat up gas with an electric element heating with no flame that the gas will burn? Gee, I always thought you needed a spark or some sort of burning action.




Alright you brainy people. If it's all in the spark and not the heat, how does a diesel engine ignite?

THIS is a fact and theres no use arquing over it: The HEAT is what ignites the fuel. The spark IS heat. That's what a spark is genuises. A slightly bigger gap, (if the voltage will still arch) will WEAKEN the spark, lessen the heat of the spark, AND inturn not ignite the fuel properly.

Just so I can stick this on a post-it and not loose my mind everytime some know-it-all wants to arque, why do you want to purposely follow every post I make, and make an arqument out of it? And um, don't try to blame it on me. The people who come here for help, that dont stick around are people with lives. They get mad at you people for acting like you do. I help to the best of my ability. Yes, I makes mistakes, we all do. I can't help it if someone needs to know how to replace CV joints but asks for a procedure on U-joints. Not my fault. Don't bitch at me about it.
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