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Thread: 2010 3.7 V6 Spark Plugs...only 3 Coils??? Reply to Thread
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  Topic Review (Newest First)
12-27-2016 09:30 PM
Big Blue
Quote:
Originally Posted by adamrieseward View Post
Big blue.. I apologize for asking the question. I will refrain in the future.
No harm in asking questions - but the question you asked was already answered in his original post, if you would have read it a little more carefully.

Quote:
Originally Posted by luckyse7ens
Hah... he's just pointing out something that you missed. I wouldn't take it personally.
Indeed.
12-27-2016 08:01 PM
luckyse7ens
Quote:
Originally Posted by adamrieseward View Post
Big blue.. I apologize for asking the question. I will refrain in the future.
Hah... he's just pointing out something that you missed. I wouldn't take it personally.
12-27-2016 04:51 AM
87058 Big blue.. I apologize for asking the question. I will refrain in the future.
12-26-2016 10:07 AM
Big Blue
Quote:
Originally Posted by adamrieseward View Post
My 2010 also only has three coils. To the guy above with half the engine working are you getting spark to the passenger side? If you haven't already solved the problem!
Quote:
Originally Posted by pipo
each time i try to start it, it starts and only the driver side head cylinder is running, when i take off the spark plugs from the passenger side cylinder i see that the get wet with fuel.
Based on his one and only post, I'd say the answer is a resounding "No".
12-26-2016 03:07 AM
87058 My 2010 also only has three coils. To the guy above with half the engine working are you getting spark to the passenger side? If you haven't already solved the problem!
11-28-2016 06:02 PM
Big Blue
Quote:
Originally Posted by pipo View Post
Hi, i need some help, the passenger side head cylinder in my jeep commander 2010 v6 3.7 does not work at all, i bought new spark plugs i check my injectors they are fine. each time i try to start it, it starts and only the driver side head cylinder is running, when i take off the spark plugs from the passenger side cylinder i see that the get wet with fuel. what i should i do in this case?
Are you getting any warning lights?

I would think if only half your engine is running, you would be getting some indication on the dash cluster.

If you had a Superchips Flashpaq Tuner, you could probably pull the DTC's yourself - but I'm assuming you don't have one since you came here just to ask this question.

So if that's the case, take it to a Jeep/Chrysler dealership and have them run a diagnostics test.

That will at least tell you what's wrong, then you can figure out how you want to handle it from there.
11-21-2016 12:09 AM
pipo
Passenger side head cylinder does not work at all

Hi, i need some help, the passenger side head cylinder in my jeep commander 2010 v6 3.7 does not work at all, i bought new spark plugs i check my injectors they are fine. each time i try to start it, it starts and only the driver side head cylinder is running, when i take off the spark plugs from the passenger side cylinder i see that the get wet with fuel. what i should i do in this case?
04-11-2015 11:55 AM
Mongo
Quote:
Originally Posted by lekmedm View Post
Sometimes there are small design changes from year to year on the same basic engine....

......Your 2006 may be different than his 2010.
Exactly, the did switch to 3 coils for 6 plugs sometime between 2006 to 2010. My 2010 3.7L V6 has this configuration.

The one coil fires both spark plugs, they are arranged for cylinders 180, so that those two have spark plug fire at the beginning of the power stroke and the end of the exhaust stroke.

This often improves emissions, because the 2nd firing of the plug will burn any left over unburnt fuel which makes HC emissions.

Its called a "Wasted Spark" system.

Perhaps it was a cost savings measure, less coils to buy, or maybe it was the only way to get the engine to pass the every increasing emissions standards every year. Eitherway it was changed, sometime around 2009 it looks, but I don't which year exactly.

Keep in mind, the way this configuration works, the coil pulls up current from one plug and drives current down to the other. So half the plugs, have the current flowing through them the opposite direction as most plugs.

Where that creates a problem is the extended life plugs, like platinum plugs. Those plugs use harder metals, like platinum or iridium, that burn away/erode slower than the typical steel electrodes in regular plugs. As the spark jumps from the harder metal to a softer metal it carries away less metal with it. But, if you have a platinum plug and the spark is jumping from the softer metal to the harder metal, it now actually carries even more metal away from softer electrode and the plug burns away/erodes even faster.

This is why they make Double Platinum plugs, they have platinum on both electrodes, so they can be used in engines that have wasted spark systems, like the later 3.7L V6.
Quote:
Originally Posted by wph4 View Post
...It seems to me that engineers around the world are designing cars that pressure the car owner to have all servicing done by the dealership (even oil changes...look at bmw). But DIYers are a hardy group of rebels. Anyway thanks again
I can't speak to BMW's, and I agree with you, but you're taking this too far. You can still change oil and filters yourself, you can reset the oil change warnings yourself, etc. Yes, the manufacturers are deliberately keeping the diagnostic information and service procedures in your vehicle from you, in ploy to force into the dealerships, and it does P.O. me to no end. And all the manufacturers do it, NOT just Chrysler. But they haven't gone so far as to prevent you from changing the oil.

BTW FOLKS, please read your Owner's Manual and replace your spark plugs when they are due, it does wonders to keep your motor running smooth and properly, starting easier, making the max power its capable of and gets you better mileage. The first symptom of eroded away plugs are stalling motors.

How many threads are there about people complaining about their Commanders Stalling, and in this thread alone we've got multiple posts of people that are past the life of their spark plugs, three times over, that should be changed.
04-11-2015 02:01 AM
MrMustang I am back up to 22.5 mpg on the highway.
04-09-2015 03:59 PM
luckyse7ens I changed my plugs @90k miles. MPG improvements were had.

I avg 16/21 with the 3.7L and 32" Dueler RH/S tires. EVIC usually says ~18.6 when my wife is commuting with it.

Full synthetics, NGK iridium plugs, removed snorkel guard and cup from bottom of intake, only 1.5" ft, no crossbars, maintained lower air dam, 2wd

I have a hypertech tune as well.
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