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Discussion Starter · #1 ·
Hi and thanks for taking a look. I have practically rebuilt the engine, replaced the cat closest to the front bumper, replaced spark and coils, (previously cleaned maf, cataclean, fuel injector cleaner, and ran valve cleaner thru throttle body). Still showing 11.x miles per gallon while Torque shows 16 or 17mpg. There are no codes thrown (Today my battery went stone cold dead after sitting or short trips). Car has 161,207 miles on it. Its a 2013 Chevy Traverse LT AWD.

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Did you reset the DIC mpg ?
11 may be the number since it was last reset...
I reset mine everytime i fill up with gas.
This weeks tank is showing 24.1 mpg.
Get to the mpg screen, hold down the checkmark button, and it resets to 0.
Hopefully that is yiur issue.
 

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Those readings you posted, where they taken with the engine at idle? If so your STFI are high. STFI should be between -3 and +3 at idle. High negative numbers indicate computer is trying to reduce fuel.
Did you put new AC O2 sensors in the front position after the Cat replacement.
 

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Discussion Starter · #7 ·
i reset Trips A&B, avg economy, fuel used, and avg speed on each refuel.

Inside Torque, I have the mpg and trip mpg meters which shows different values.

Sitting here at idle in driveway (pictures above) shows 16 mpg currently.
 

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Very interesting.
I have a post somewhere here.
I did a test.
Hand calc vs
Laptop software vs
DiC.
After test run... all were extremely close to each other.

Thinking out loud. Stick tire size?
 

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Discussion Starter · #12 ·
Interesting... I am going to try hosing down the MAF and throttle body tomorrow morning before my trip o Atlantic City. Thinking maybe will help along with the trip down at highway speed with premium gas In the tank will help the fuel injector cleaner put in and burned thru 1/2 a tank and clean the valves in the process.
 

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If check engine light is on, then remote start is disabled. Weak battery may not start on remote but will start with the key is another possibility.
 

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Discussion Starter · #15 ·
Got 14.9 running between stop and go and highway miles. I CRC sprayed the valves thru the trottlebody and cleaned the MAF.

Wondering if the full trims between the 2baks should be equal or at least close?
 

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Discussion Starter · #16 ·
Well... After CRC throttle body, MAF cleaner, fuel injector cleaner and 210 miles my mpg slowly rose to 17.0 mpg highway. Was 11 mpg city... Think I need to take to a mechanic to perform the throttle body cleaning again using the vaccum line method. I am not sure what to pull to do it and when I did it there wasn't much smoke. Just a circular wet pattern at the exhaust pipe.
 

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How old are those oxygen sensors? I change mine at the spark plug service interval of 100k miles with only Genuine GM sensors.
Oxygen sensors are one of the primary fuel control sensors. At 161k miles I would say you are overdue. Sensors get ''lazy'' as the miles pile on.
 

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Discussion Starter · #20 ·
Hi! Thanks for responding! I had been getting only 11.x mpg on the dash. I had cleaned the MAF sensor which creeped up to 16mpg highway this past Sunday. I replaced the MAF sensor and immediately saw MPG climbing. I drove about 40 miles just to see what would happen with cruise control set to 60mph. Sure enough MPG went up to 22.9 Hwy. Torque also happened to log misfires in cylinder 3 however.

Speed (OBD)(mph) Engine RPM(rpm) [GM]Transmission Output Speed(RPM)
60.27 1574.5 2120.38
60.27 1601.75 2121.12
60.27 1601.75 2121.12
60.27 1715.5 2118

Device TimeSpeed (OBD)(mph)Engine RPM(rpm)[GM]Transmission Output Speed(RPM)[GM]Misfire Cyl.3 History(Count)
17:42.4​
60.27​
2142.75​
2115.62​
6​
24:55.4​
60.27​
1574.5​
2120.38​
2​
24:56.4​
60.27​
1574.5​
2120.38​
2​
27:31.4​
60.27​
1601.75​
2121.12​
4​
27:32.4​
60.27​
1601.75​
2121.12​
4​
34:42.4​
60.27​
1715.5​
2118​
2​
34:43.4​
60.27​
1715.5​
2118​
2​
34:44.4​
60.27​
1715.5​
2118​
2​
34:45.4​
60.27​
1715.5​
2120.38​
2​
34:46.4​
60.27​
1579.5​
2120.38​
2​
34:47.4​
60.27​
1579.5​
2120.38​
2​
38:56.4​
60.27​
1579​
2112.38​
2​
38:57.4​
60.27​
1579​
2112.38​
2​
45:04.4​
60.27​
1613​
2123.5​
10​
45:05.4​
60.27​
1613​
2123.5​
10​
45:06.4​
60.27​
1613​
2123.5​
10​
45:07.4​
60.27​
1582.25​
2120.38​
10​
45:08.4​
60.27​
1582.25​
2120.38​
10​
46:56.4​
60.27​
1660.5​
2111.62​
2​
46:57.4​
60.27​
1660.5​
2111.62​
2​
50:28.4​
60.27​
1591.5​
2116.38​
4​
50:29.4​
60.27​
1591.5​
2116.38​
4​
50:44.4​
60.27​
1624.25​
2105.25​
2​
50:45.4​
60.27​
1624.25​
2125.88​
2​
50:46.4​
60.27​
1586.5​
2125.88​
2​
50:47.4​
60.27​
1586.5​
2125.88​
2​
50:48.4​
60.27​
1586.5​
2125.88​
2​
50:49.4​
60.27​
1611.25​
2114.75​
2​
50:50.4​
60.27​
1611.25​
2114.75​
2​
 

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