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Old 02-18-2014, 02:26 PM   #61
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Originally Posted by jwindbigler View Post
That's about what Im getting right now. It just seemed really weird that as soon as I swapped wheels, the mpg went down. Or at least that's the way it seems.
Did you get the wheels and tires right about the time the weather changed?

I think it was probably a combination of the additional weight of the wheels and tires that may have caused a slight decrease, in conjunction with the weather change which also caused a decrease.
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Old 02-18-2014, 04:28 PM   #62
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I put them on 1/22/14 according to my notes on fuelly. In December it looks like I was getting anywhere from 26-30mpg. While the average was closer to 29. I havent come close to getting 30mpg since 1/22/14. Installed the CAI on 2/5/14
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Old 02-18-2014, 04:32 PM   #63
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It very well could be the wheels. Weight alone of the wheel can make a difference. Could you tell a difference in braking? Usually driving wise you cannot tell much through acceleration, but when you brake you might find yourself stopping slower. I went from a 15" wheel on my Lancer to a 17" wheel and although taking off it wasn't any slower, braking it made a difference. If you can't tell any difference between the two at all in driveability than the difference would be too small to really decrease your mileage noticeably, so at that point I would look else where, possible wheel bearing, dragging brake, fuel filter, spark plugs, miss-fires, and vacuum leaks. Maybe even a MAF cleaning. Winter gas or even just mother nature.
I havent noticed any significant braking difference.

Brakes dont feel like anything is grabbing, so I highly doubt its a dragging brake. I dont feel any difference upon accelerating.
I havent replaced my fuel filter yet
I havent changed plugs yet either (doing this very soon)
Dont think its a vacuum
Ill clean the MAF. Just in case. I havent cleaned one before, so what product should I use? Just a standard carb cleaner?
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Old 02-18-2014, 04:33 PM   #64
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Originally Posted by jwindbigler View Post
I put them on 1/22/14 according to my notes on fuelly. In December it looks like I was getting anywhere from 26-30mpg. While the average was closer to 29. I havent come close to getting 30mpg since 1/22/14. Installed the CAI on 2/5/14
I would say the additional weight of the wheels and tires is at fault then. Maybe once the weather warms up the the cai improvement of mpgs will counter that of the wheels
I wish there was something I could suggest in the mean time to fix it. When is the last time you changed your spark plugs? This usually gives a slight increase in mpgs depending on how worn out they are.
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Old 02-18-2014, 04:36 PM   #65
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Originally Posted by jwindbigler View Post
I havent noticed any significant braking difference.

Brakes dont feel like anything is grabbing, so I highly doubt its a dragging brake. I dont feel any difference upon accelerating.
I havent replaced my fuel filter yet
I havent changed plugs yet either (doing this very soon)
Dont think its a vacuum
Ill clean the MAF. Just in case. I havent cleaned one before, so what product should I use? Just a standard carb cleaner?
You posted this as I posted lol. I think you will see a 1-3mpg increase changing your spark plugs and cleaning the MAF.

As for cleaning it you can find MAF sensor cleaner at any parts store or walmart.

It is very easy to use. You simply spray it on the sensor and pat dry any over spray. It evaporates very quickly.
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Old 02-18-2014, 04:39 PM   #66
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You posted this as I posted lol. I think you will see a 1-3mpg increase changing your spark plugs and cleaning the MAF.

As for cleaning it you can find MAF sensor cleaner at any parts store or walmart.

It is very easy to use. You simply spray it on the sensor and pat dry any over spray. It evaporates very quickly.
Seems simple enough. Ill get a pack of A103 I believe is the copper plugs I wanted. The .055 gap is what I think im going to run, unless theres some expertise in the area.
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Old 02-18-2014, 04:41 PM   #67
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I would say the additional weight of the wheels and tires is at fault then. Maybe once the weather warms up the the cai improvement of mpgs will counter that of the wheels
I wish there was something I could suggest in the mean time to fix it. When is the last time you changed your spark plugs? This usually gives a slight increase in mpgs depending on how worn out they are.
Thats what I was thinking, but theres been times where the car has dipped down to 26mpg during the winter. I believe its mostly due to snowfall. Now with the combination of the snow, and the wheels, its not wanting to be as efficient as it used to be
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Old 02-18-2014, 04:44 PM   #68
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Seems simple enough. Ill get a pack of A103 I believe is the copper plugs I wanted. The .055 gap is what I think im going to run, unless theres some expertise in the area.
Sounds good to me. If you had more mods you could get away with gaping more but I think .055 is a safe call for reliability and such.
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Old 02-18-2014, 04:47 PM   #69
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Sounds good to me. If you had more mods you could get away with gaping more but I think .055 is a safe call for reliability and such.
I read on here gapping to .060 drastially reduces the life of the plug, and causes some of them to melt very quickly.
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Old 02-18-2014, 04:54 PM   #70
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I read on here gapping to .060 drastially reduces the life of the plug, and causes some of them to melt very quickly.
Yes there is a reduction of life but with a slight increase in performance, I think I went ahead and gaped mine about .057 just to be on the safe side. But then again I had more mods going on that could benefit from the additional gaping. Spark plugs are cheap though
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