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Old 01-13-2012, 01:54 PM   #1
keelerpd
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Default Poor fuel mileage 2.2 L Ecotec

All,

I have heard great things about this engine and car (ION). I drive a 2004 ION 5sp manual to work. I drive about 75 mph and don't do jackrabbit starts. The car has 114K miles on it and the oil is always full and clean. I have observed mileage from 27 to 29 mpg with 29 being the top I have ever gotten with it. I drive almost all highway miles and got 351 miles out of the last tank of gas. I realize that this may be in the "normal" range but I wanted to ask the forum what they have seen. Should I expect better mileage? What can I check if this is not as good as I should see.

My SL2 with a 1.9 with 272K miles delivered 33 mpg everyday!

Ideas?

Thanks in advance.

...
2004 ION 3 - LE - 114K miles
1999 SL2 - Owned since new, 272K miles (ALAS Sold)
1964 Chevelle - restoring
1965 Chevelle 2 dr post - driver

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Old 01-13-2012, 02:28 PM   #2
2006 ion2
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2007 ION-2 Sedan
Default Re: Poor fuel mileage 2.2 L Ecotec

Look for my thread about suggested pm by engine and year. You are getting low mileage for an ion.I drive a few miles back and forth to work each day, so the engine doesn't warm up, in city driving, and I still get 27.

...
2007 Saturn Ion 2
2003 Chevrolet venture lt

trifecta dealer for the U.P. and WI. There is no two door ion. Proudly driving one of the last saturns produced before gm killed the brand.

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Old 01-13-2012, 03:38 PM   #3
keelerpd
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Default Re: Poor fuel mileage 2.2 L Ecotec

Upon poking around under the hood, I noticed an empty harness plug...it is on the left side in front of the radiator. It is odd. This car didn't have an easy life before me, but it does run well. I ran some Lucas fuel injector cleaner through it and I prolly should replace the fuel filter too.

I will try to get a pic of the plug tonight...not saying that it is anything, but I want to be sure.

...
2004 ION 3 - LE - 114K miles
1999 SL2 - Owned since new, 272K miles (ALAS Sold)
1964 Chevelle - restoring
1965 Chevelle 2 dr post - driver

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Old 01-13-2012, 03:55 PM   #4
2006 ion2
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Default Re: Poor fuel mileage 2.2 L Ecotec

It's a mystery plug. Dealers don't know what it is

...
2007 Saturn Ion 2
2003 Chevrolet venture lt

trifecta dealer for the U.P. and WI. There is no two door ion. Proudly driving one of the last saturns produced before gm killed the brand.

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Old 01-13-2012, 10:10 PM   #5
keelerpd
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Default Re: Poor fuel mileage 2.2 L Ecotec

So you know the plug I am talking about? There isn't supposed to be anything plugged into it? Like I said, this car was treated the best before I got it. Tomorrow I am going to clean the IAC and TPS and TB and change oil...Also replace plugs with AC Delco plugs and I have put injector cleaner into this tank. I probably need to replace the fuel filter as it probably hasn't ever been changed.

The car has 114K on it. Anything else you can think of that would impact mileage? I have new tires all the way around at correct pressure also.

THanks in advance,

...
2004 ION 3 - LE - 114K miles
1999 SL2 - Owned since new, 272K miles (ALAS Sold)
1964 Chevelle - restoring
1965 Chevelle 2 dr post - driver

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Old 01-14-2012, 09:08 AM   #6
2006 ion2
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Default Re: Poor fuel mileage 2.2 L Ecotec

it does nothing. look up my thread on this topic.

...
2007 Saturn Ion 2
2003 Chevrolet venture lt

trifecta dealer for the U.P. and WI. There is no two door ion. Proudly driving one of the last saturns produced before gm killed the brand.

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Old 01-26-2012, 08:02 AM   #7
keelerpd
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Default Re: Poor fuel mileage 2.2 L Ecotec

Well...I have checked and replaced plugs on my ecotec. I noticed that there were NGK plugs in it before and it now has the correct AC Delco plugs in it for the 2.2 Ecotec, AC part number 41-405. The threaded part of the plug on the correct plugs was about 1.5 inches LONGER than the NGK plugs, so I thought "oh this should make it get better mileage" as I figured that the spark from the plug wasn't even in the combustion chamber. I did call two different auto places to be sure that the plugs were the right ones and they both gave me the same number.

Now the car gets WORSE mileage...the calculated mileage on the last tank was just over 25 ON THE HIGHWAY.

HELP HELP HELP...What can I check. There are NO SES lights on (that I can see). I have a scanner, I just haven't scanned it yet for background codes.

The car seems to run fine, no misses or anything, the mileage just sux. This is quite a step backward from my SL2 which achieved 33 easily all day with 272K miles on it.

Thanks in advance....

...
2004 ION 3 - LE - 114K miles
1999 SL2 - Owned since new, 272K miles (ALAS Sold)
1964 Chevelle - restoring
1965 Chevelle 2 dr post - driver

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Old 01-26-2012, 09:04 AM   #8
2006 ion2
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2007 ION-2 Sedan
Default Re: Poor fuel mileage 2.2 L Ecotec

did you do everything I suggested in my thread?

...
2007 Saturn Ion 2
2003 Chevrolet venture lt

trifecta dealer for the U.P. and WI. There is no two door ion. Proudly driving one of the last saturns produced before gm killed the brand.

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Old 01-26-2012, 09:21 AM   #9
keelerpd
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Default Re: Poor fuel mileage 2.2 L Ecotec

I went back and read the thread again and I need to pull off the throttle body and clean the IAC and TPS. I would imagine the the TB is pretty gunked up, but could this cause this big of a drop?

...
2004 ION 3 - LE - 114K miles
1999 SL2 - Owned since new, 272K miles (ALAS Sold)
1964 Chevelle - restoring
1965 Chevelle 2 dr post - driver

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Old 01-26-2012, 10:00 AM   #10
2006 ion2
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2007 ION-2 Sedan
Default Re: Poor fuel mileage 2.2 L Ecotec

yes, it possibly could. you might want to try everything preventative in that thread, even if you don't think it applies because of your mileage.

...
2007 Saturn Ion 2
2003 Chevrolet venture lt

trifecta dealer for the U.P. and WI. There is no two door ion. Proudly driving one of the last saturns produced before gm killed the brand.

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