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Old 12-04-2010, 05:39 PM
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Lightbulb Spark Plug Analysis??

ok so i took out the 4th cylinder spark plug i believe. the 4th cylinder when you are facing the engine is the second from the front on the left, correct?

here is the picture of it, what do you guys think? it actually looks pretty clean around the tip which is somewhat of a relief. the check engine light is reading misfire in cylinder 4. the guy took the truck to the beach alot so i think thats what all that sand/dirt is coming from

what should be my next step? i was thinking of either replacing all the spark plugs, cap and rotor, and spark plug wires right now (i already have the parts)

or i can just swap out the one spark plug and do the rest in a few weeks when i have a compression tester and do the rest of the work then

what do you guys think, how important would a compression test be at this point? i am just trying to save time, dont really want to take all the spark plugs out twice

let me know what you all think, thanks!
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Old 12-04-2010, 05:41 PM
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Looks like it's been running rich to me. I'd go ahead and do the plugs, wires, cap and rotor. No need to do a compression test right now unless you have reason to believe it's lost compression.
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Old 12-04-2010, 06:04 PM
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Quote:
Originally Posted by RamTech View Post
Looks like it's been running rich to me. I'd go ahead and do the plugs, wires, cap and rotor. No need to do a compression test right now unless you have reason to believe it's lost compression.
what causes it to run rich? how do i fix that?

what signs would i be looking at as far as determining if it has lost compression?

thanks!
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Old 12-04-2010, 06:14 PM
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running rich can be caused by a leaky or defective injector. Have you looked at the rest of the plugs yet?
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Old 12-04-2010, 07:01 PM
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Quote:
Originally Posted by MADDOG View Post
running rich can be caused by a leaky or defective injector. Have you looked at the rest of the plugs yet?
i am workin on it, how do u get to the distributer on these engines?? i cant even see it, i thought the air filter was just in the way but after taking it out i still cant see where the wires are going
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Old 12-04-2010, 07:48 PM
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i guess i am going to wait on the wires and cap for now and just do the plugs since its raining now

here is a picture of the left side of the engine in order (the second plug which is the cyclinder in question is the one that looks different than the others somehow it got alot dirtier)
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Old 12-04-2010, 08:15 PM
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Quote:
Originally Posted by MOPAR stallion View Post
i guess i am going to wait on the wires and cap for now and just do the plugs since its raining now

here is a picture of the left side of the engine in order (the second plug which is the cyclinder in question is the one that looks different than the others somehow it got alot dirtier)
I would go ahead and change the plugs and wires. That number 4 plug almost looks like it wasn't seated properly, was it easy to remove ?
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Old 12-04-2010, 08:30 PM
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trouble shooting spark plugs
look at the whole plug, especially around the electrode
http://www.autohausaz.com/html/spark...lug-wires.html
http://www.cyclepedia.com/spark-plug-troubleshooting/
http://www.ngksparkplugs.com/tech_su...x.asp?mode=nml

remember that IF you have spark plug wires, they can also cause similar symptoms
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Old 12-04-2010, 09:33 PM
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thanks for the input so far guys, i would say at least 3-4 of the plugs were pretty hard to get out across the board which was strange some of them also squeaked coming out

i will look at those articles further and save the plugs

heres the drivers side plugs
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Old 12-05-2010, 01:44 AM
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Don't forget the anti-sieze when you put 'em back in.
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