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post #21 of 27 (permalink) Old 02-08-2014, 12:02 PM
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I run 35ish winter, 38-40 summer

2009 Ford Escape Limited - 3.0L, 6 speed auto, 4x4, 25/33 city/hwy imp mpg.
2017 F150 XLT-XTR - 5.0L, 4x4, 3.55's, E-locker, xtr chrome package, fx4 off-road package.
20/25 imp mpg
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post #22 of 27 (permalink) Old 02-08-2014, 01:58 PM
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I run 35ish winter, 38-40 summer
Have you noticed any odd wear patterns on your tires or a bumpy ride?

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post #23 of 27 (permalink) Old 02-08-2014, 03:57 PM
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Higher than 35 which is standard on a touring/mild performance tire will improve MPG but wear out much faster. For 38 psi, your inner/center tread will wear faster. Just stick with 32-35 psi all year long. Your DIC should indicate when it drops below 28psi with a TPMS fault light on your dash.

If a fuel filter/strainer is clogged, then yes, it will affect your mpg, but with 45k mileage, should have no issues unless you have to buy cheapest fuel around town. I stick with Shell fuel, no preference, but better known than a mom-pops place. I would check spark plugs not for just replacing, but look to see what color they show, that will tell you a lot.

By the way, is your cobalt a flex fuel LT? and have you used e85 more than once? just wondering cause the factory injectors cannot withstand a constant change of fuel types. It will deteriorate the metal on the fuel injector solenoid, causing the injector to stay open all the time, reducing fuel economy, but a CEL should trigger as well.

2009 Cobalt LS XFE U74
Mods: K&N Typhoon Intake, Option Cat-Back Exhaust, Cosmo Short shifter, Maxxim Ahead 17X7's, MPx shorty antenna, FE5 Strut/shocks, Tein S Techs, Moog endlinks, Moog spring seaters, ZZP shorty header, LSJ downpipe, LNF front grille

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post #24 of 27 (permalink) Old 02-08-2014, 04:18 PM
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Quote:
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Have you noticed any odd wear patterns on your tires or a bumpy ride?
Nope, I know most tires wear out the middle like stealth said but my tires wore perfect, no scalloping or anything. They did wear out way to quick 20k km, but they're a cheap tire called geostar. As for ride comfort, other than hard turns I wouldn't have been able to tell they were pumped up higher than normal.

2009 Ford Escape Limited - 3.0L, 6 speed auto, 4x4, 25/33 city/hwy imp mpg.
2017 F150 XLT-XTR - 5.0L, 4x4, 3.55's, E-locker, xtr chrome package, fx4 off-road package.
20/25 imp mpg
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post #25 of 27 (permalink) Old 02-08-2014, 10:20 PM Thread Starter
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Ok, is there a fuel filter on mine/ 09 cobalt LT? is it part of the fuel pump?

---------- Post added at 10:20 PM ---------- Previous post was at 09:35 PM ----------

And I had a DTC U2111...what does this mean? is there something wrong with that code poping up, no check engine light is on

Last edited by Deven534; 02-08-2014 at 09:27 PM.
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post #26 of 27 (permalink) Old 02-10-2014, 04:04 AM
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That U2111 is loss of connection from PCM to another control module, possibly steering assist or near that area. A U code will not trigger a CEL, but it stands for loss of communication or networking to another module.

2009 Cobalt LS XFE U74
Mods: K&N Typhoon Intake, Option Cat-Back Exhaust, Cosmo Short shifter, Maxxim Ahead 17X7's, MPx shorty antenna, FE5 Strut/shocks, Tein S Techs, Moog endlinks, Moog spring seaters, ZZP shorty header, LSJ downpipe, LNF front grille
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post #27 of 27 (permalink) Old 02-10-2014, 08:44 AM Thread Starter
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So does that mean I should take my car in for that U code or shouldn't I worry about it?
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