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NathanKing
Dodge Dakota
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11/01/2005
21:35:14
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 Subject: Gas Mileage
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Message:
2003 Dodge Dakota
3.9 V6 4x4 48,000 miles
My gas mileage has been dropping recently to about 13-14 mpg in the city and highway, it doesnt matter. when I first got the truck I was getting 18 on the highway and about 16 in the city. Any ideas on what could the issue might be and any solutions?
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SuperKota
Dodge Dakota
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11/01/2005
22:12:29
| RE: Gas Mileage
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Message:
Hey read the post named GAS GAS GAS. i am having the same problem but its wrose like going from 15mpg to 8mpg.
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Adam
Dodge Dakota
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11/02/2005
00:43:46
| RE: Gas Mileage
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Message:
Yea the exact same crap is happening to me now too.I was averaging almost 18 and now I average around 15.5 I have replaced my cap and rotor, wires, T-Stat, Plugs, Coil, Air Filter, Plenum Gasket, Intake Manifold Gaskets, O2 Sensor and yet with in the last 5k. O2 Sensor and the gaskets were done within the last few hundred miles. Wires T-Stat and Coil done with in the last 1500 mi. I dont get it. I done things thinking they would help and all of a sudden mileage goes down. It's a little more peppy but thats it.
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cuzindoug
GenIII
11/02/2005
09:11:05
| RE: Gas Mileage
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Message:
Adam and SuperKota and NathanKing. If you have changed to a 180 t-stat or lower, that may have caused your decline in MPG. Our trucks run off of PCM presets until it reachs the minumum operating temperature of about 160-165 degrees. If your temp doesn't get this high, OR your coolant temperature sensor is faulty, your truck will never go into closed loop operation. This means that the engine will be burning more fuel, which is the PCM's preset(open loop) during initial startup(warms engine faster), instead of running off of the sensors(closed loop).
If it ain't broke, fix it til it is.
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NathanKing
Dodge Dakota
JOIN HERE
11/02/2005
09:47:25
| RE: Gas Mileage
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Message:
Everything on the truck is original when the decline started to happen. The only thing I have changed was the spark plugs. It runs a little smoother but still bad gas milage.
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