What Was Your Spark Plug Gap?

I had mine at(from left spark to right side while working on the engine)
Left: .19 .20 .23 .19 then i changes them to .35

I have the 2011 ls 1.8l

I just re-gapped the plugs in my 2012 1LT 1.4 AT. All four were .025. Now they're .035. It ran pretty good before and seems about the same now.

I have a 2011 1.4T ECO, 6-Spd Manual with Trifecta tune. Mine were .026, .026, .026 and .025.
They're now all at .029 and I don't feel much of a difference.
I'll monitor the gas mileage to see if I have any changes.
Great post!

2011 cruze eco mt, from right to left, my gaps were ..019 .019 .016 .025, regapped to .035. Alot better now, no hesistation now!

Holy crap, .016?!?! Your car had to be bogging like crazy.


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0.016 would explain why you were having such a hard time shifting smoothly.

jblackburn said:

Holy crap, .016?!?! Your car had to be bogging like crazy.


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It was! Im only guessing at the .016 too it was smaller then the .019 gapper i had and a hair bigger then a .014 feeler gauge i have.

Checked mine tonight. 1.4 ECO MT manufacture date of 5/12. Every plug was set at .025. At least they were all the same. Set the gap to .035 as suggested, and definitely noticed a difference as others have. I didn't get a great long distance test drive however, I did notice a difference. I even took it over to a friends house, who drove my car prior to me changing the gap and resonator removal, and had him drive it. His words, "What did you do to this thing"!? I told him, "the only thing I've done is remove the resonator, and gap the plugs". He couldn't believe the difference. It's funny, he has a new Malibu and is now searching forums to see if there is anything he can do to his to help with performance. Tomorrow, I will report back after I drive it to work (120 miles rnd trip) and see how it did. Thank you XtremeRevolution for posting this great find. Keep up the good work!

Thanks,
bruteforce
http://www.cruzetalk.com/forum/4009-xtremerevolution.html

Uploaded a new spreadsheet with the latest numbers. I changed the formatting a bit to make it easier to read, and added a smooth chart.

Thanks. I think the chart just about says it all.

XtremeRevolution said:

Uploaded a new spreadsheet with the latest numbers. I changed the formatting a bit to make it easier to read, and added a smooth chart.

Click to expand...

Could you add a vehicle manufacture date to this as well (assuming it has been provided)? Since all my plugs were the same, I'm curious if the issue has been somewhat looked at recently. Not saying they're set "right" but, at least they were all the same.

bruteforce said:

Could you add a vehicle manufacture date to this as well (assuming it has been provided)? Since all my plugs were the same, I'm curious if the issue has been somewhat looked at recently. Not saying they're set "right" but, at least they were all the same.

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I've seen many with a 2011 and a 2012 that also had the same consistency. I haven't noticed any correlation there.

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Did mine earlier 3 at .25 and 1 at .23... def smoother acc 2011 lt2 auto

obermd said:

0.016 would explain why you were having such a hard time shifting smoothly.

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Yep, its much better now, the car barely made it up hills without bogging! I thought it was my lack of manual knowledge, nope, today i took a corner at 65 downshifted to 4th and pulled through it with ease, before it woulda hesiated like a pig at a slaughter house.

I can run 87 octane again - even in the heat of summer. Before I regapped I had to run 91. Yeah!!!

obermd said:

I can run 87 octane again - even in the heat of summer. Before I regapped I had to run 91. Yeah!!!

Click to expand...

My car is much improved from what it used to be. But I believe it still heat soaks in 90+ temperatures with AC running full blast in traffic, and on 87 it was bogging a bit trying to take off. Once I got going and got some airflow through the front of the car (it had been sitting in shopping centers and the like with a hot engine), taking off from the next stop wasn't bad at all.

This never seems as pronounced on higher octanes - HOWEVER, the cars overall response on 87 octane is much better than when I first got the car. I'm thinking of doing the intake resonator delete this weekend to see if it will help cool down IAT temperatures a bit more at idle.


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jblackburn said:

I'm thinking of doing the intake resonator delete this weekend to see if it will help cool down IAT temperatures a bit more at idle.


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Do it! You won't regret it. It took me about 3 minutes..hood up to hood down. You will definitely notice the difference.

how are you gapping iridium plugs took me 1 hour withpro feeler guage.
I also took great care to not destroy iridium tip . these are the hardest alloy spark plugs I have ever checked.
0.028 is the dwell I have .