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2006-2012 Eclipse (General 4G) General discussion and information about the 2006-2012 (4th Generation) Eclipse.


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Old February 16th, 2017, 04:12 AM   #1 (permalink)
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Spark Plugs and Ignition Coils

I've just bought a 06 GT not too long ago with 100k.

I did a few 0-60 runs from a dead stop, and all of a sudden i got a check engine code of a p0302 miss fire on 2 (also traction control didnt want to turn back on after awhile). I then cleared the code and it went away and it never came back and I been driving normally ever since.

1)My question is , should i change my spark plugs and wires?

2) how long do our ignition coils last? Im debating on changing all 6 of them just incase but its quite expensive just for 1.
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Old February 16th, 2017, 12:02 PM   #2 (permalink)
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What octane of fuel do you run? Also it could be the injector potentially as well.

If they are the original plugs, they're on their way out the door. ~100k mile life on iridium plugs. I'm not sure about the life span on the specific coils used. But usually they coils handle the 100,000 mark.

For specific info, you can find it in the service manual and technical manual

2006 Eclipse Factory Service Manual – Tearstone

2006 Mitsubishi Eclipse Technical Information Manual – Tearstone


My opinion, I'd change just the spark plugs and be sure to run 91 octane fuel (if you're not already). Before changing the coils you can measure them with a ohm meter, but you'd have to find the resistance value they should have to compare to.

I also swear by running some sea foam through the gas tank to clean the injectors
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Old February 16th, 2017, 05:29 PM   #3 (permalink)
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i run shell gasoline v-power nitro+ rated at 92 octane and i been using clean boost max from amazonfor the past 2 fill ups, which are said to really work and theres proof on youtube by either increasing mpg and horsepower slighly or one of them.

So i dont have to change my fuel injectors? cause those things seem a little pricey too... I never tried seafoam before but ill look up on it.

Do you recommend that i change the motor oil or something after using seafoam?

thanks
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Old February 16th, 2017, 06:10 PM   #4 (permalink)
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Not to hijack from sabertooth, but since he's offline I figured I'd answer your question in regards to the seafoam.

I think he was referring to just putting the seafoam into your fuel tank to clean the fuel injection system out.

But if you do put it in your motor oil too, I believe the recommended time is 1-300 miles prior to an oil change.
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Old February 16th, 2017, 09:38 PM   #5 (permalink)
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Hey Ryan. Never be afraid to share info, I love it when other people jump in.


But yeah--dump a can of it into your fuel tank. You can use it in the engine too before doing an oil change and it'll clean out a lot of crud too, though. I think the GT has hydraulic lifters, so that would be nice to have cleaned.

Injectors MAY be the issue, but without the problem being narrowed down and the cheap possible ways to fix it being tried first (the engine will be happier after these either way, and likely gain power) I wouldn't be dropping hundreds of dollars on them.

92 octane is fine, helps relieve the issue better than 91 would even, if it were pre-ignition causing the misfire code.
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Old February 17th, 2017, 01:26 AM   #6 (permalink)
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Thanks for the help.

I do have a small ticking sound sometimes at a cold start in the morning or for not starting the car for a long time, sometimes it doesn't show up on some mornings as well.

But that will eventually go away a few minutes after driving this had been happening before and after i got my timing belt, water pump, drive belt, and a synthetic oil change 500 miles ago

I read that it could be the lifters too with our engines and its a common noise in most 4g motors as well for previous generations, but it said to be no big deal.
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Old February 17th, 2017, 12:11 PM   #7 (permalink)
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The engine will tick a bit when cold, but it could also be belt related. I need to change my serpentine belt. It makes a ticking noise when cold
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Old February 18th, 2017, 01:41 AM   #8 (permalink)
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ok ive added a can of seafoam to 1/2 gas tank, but do u think this is a better method in adding seafoam than removing tubes to clean our intake? https://www.youtube.com/watch?v=u6UeJXkzDW8
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Old February 18th, 2017, 02:30 AM   #9 (permalink)
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That way works too. Ive personally done this sea foam method. Seafoam your Eclipse it's basically the same thing. I like the how to on here a bit more because of the amount you use and how good the details and results are. I've done it twice for my 4g. One when I bought it. 2nd time was once I hit 90k miles.
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Old February 18th, 2017, 11:00 AM   #10 (permalink)
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I get the compressed one when cleaning the intake. It has a hooked straw, and I slip it right into the throttle body. Does shit all for injectors, just to be clear, when doing it through the intake. We're focused on your fuel and ignition system right now
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Old February 18th, 2017, 08:25 PM   #11 (permalink)
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oh i already added a can of seafoam to 1/2 gas tank, im buying another can for intake and 5 months from now ill buy another can for 1/3 in oil and gas again when im doing a synthetic oil change
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