E3.66 Spark Plugs ??? - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
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post #1 of 17 (permalink) Old 01-06-2014, 06:13 PM Thread Starter
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E3.66 Spark Plugs ???

About to try a new set of E3.66 plugs in my 2010 Cobalt LT 2.2 eco tec
looking for some opinions on them
The Positive and Negative
I didnt want to buy the cheapest but I didnt want to buy the most expensive either so i went in the middle with these...
Im kind of weary on them though because ive never heard of the brand before was hoping someone on here could shed some light for me

Other information:
Trying new plugs because 14 MPG is just not cutting it any more (trying the cheaper routes first before i get into buying replacement parts)
and also trying STP Complete Fuel System Cleaner..guy at the counter recommended that I shouldn't use the cleaner on a new set of plugs??
Thanks
And very sorry if this is in the wrong spot
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post #2 of 17 (permalink) Old 01-06-2014, 06:22 PM
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Never heard of anybody getting good results with those plugs in an ecotec. But please let us know how you make out, also let us know if they come pregapped for your 2.2L. Personally I would have stuck with the OEM dual iradium ACDelco plugs. I also would have used the GM fuel treatment because I've had good results with it. I don't work for GM, it just happens that in this case I've found these to be the best.

Do you have a check engine light on?

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post #3 of 17 (permalink) Old 01-06-2014, 06:30 PM Thread Starter
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I almost certian that Im bringing these plugs back and going with something better...something was telling me I should buy them
No there is no check engine light..odd
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post #4 of 17 (permalink) Old 01-06-2014, 06:38 PM
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Try new fuel filter and stock plugs. If that doesnt cut it, im assuming your injectors are clogged. If thats the case, I have some stock injectors you can buy if you want

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post #5 of 17 (permalink) Old 01-06-2014, 06:52 PM
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Have you owned your Cobalt since day one?

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post #6 of 17 (permalink) Old 01-06-2014, 08:47 PM Thread Starter
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Originally Posted by BankerBalt View Post
Try new fuel filter and stock plugs. If that doesnt cut it, im assuming your injectors are clogged. If thats the case, I have some stock injectors you can buy if you want
Im gonna hold off on the filter right now as i have no way of getting it changed at the moment..Im not actually home so I would rather wait until I am home to do something like that
I will be tring differnet plugs for sure
Ill be bringing them E3s back and getting the AC Delco ones
And appreciate the offer and will keep it in mind

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Have you owned your Cobalt since day one?
No
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post #7 of 17 (permalink) Old 01-06-2014, 09:16 PM
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Maybe the previous seller if it was a used car dealer taped over the check engine light like some we've seen on here. Maybe take it in to have codes checked because what you describe sure sounds like a failed HOČ and your engine is runing in open loop all the time. Shaddy dealers do this all the time.

---------- Post added at 01:16 AM ---------- Previous post was at 01:01 AM ----------

Unless you have your own code reader of course.

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Last edited by Coby7; 01-06-2014 at 09:15 PM.
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post #8 of 17 (permalink) Old 01-06-2014, 09:42 PM Thread Starter
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Maybe the previous seller if it was a used car dealer taped over the check engine light like some we've seen on here. Maybe take it in to have codes checked because what you describe sure sounds like a failed HOČ and your engine is runing in open loop all the time. Shaddy dealers do this all the time.

---------- Post added at 01:16 AM ---------- Previous post was at 01:01 AM ----------

Unless you have your own code reader of course.
Apreciate the concern and helpfulness but I assure you that this is not the case. The car came from my father
I too have though it might be an O2 sensor
Is there a cheap way to see if thats my problem as I dont have a lot of money to get this looked at..can an o2 sensor be cleaned perhaps?
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post #9 of 17 (permalink) Old 01-07-2014, 04:05 AM
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no but it should b throwing a code if that. go to autozone or somewhere with reader and get codes read for free to c

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post #10 of 17 (permalink) Old 01-07-2014, 06:07 AM
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I would never recommend E3 plugs to any vehicle, its basically a spark plug to get you from where your stuck to home, then toss out. I would recommend what OE uses, the AC Delco Iridiums, best plug to last you 100k mileage, averagely.

For 14mpg, do you have any smell of fuel odor after the vehicle has turned off? Checked the air filter or notice any unusual idle?

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