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marshall
Dodge Dakota
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7/04/2004
10:14:59
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 Subject: Bad gas mileage after repairs
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I have a 91 dakota 6 cul 3.9, 220,000 miles. Recently I had a timing gear cover replaced that was rusted out and leaking.While he was in there he replaced timing gears and everything, as well as thermostat. Earlier i had replaced plugs and plug wires. Since the repair i noticed my engine runing rough when idling and my mileage has went from a steady 19 per gallion to 15-16.It runs fine at normal driving speeds. Could the timing be off and affecting my mileage so much, or could the wrong thermostat be in making it run cooler. I usually gor 300 miles to a tank now its more like 250.
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jared
Dodge Dakota
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7/04/2004
11:43:37
|  RE: Bad gas mileage after repairs
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It could be out of time, you could have a bad wire, plug, or you could have the plugs gapped wrong. All of these things can cause rough idle and poor gas milage. If the timing is out, i would take it back apart and line up the timing marks. Check all the obveous things first before going that way. If you had a garage do all this work you should not have to pay to have them correct the problem.
Good luck
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marshall
Dodge Dakota
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7/04/2004
11:46:26
| RE: Bad gas mileage after repairs
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Actually it ran pretty good after the repairs the rough idling only started maby a month after that.My plugs have abut 60,000 mile son them but looked pretty good.Maby i just need to change them again, mainly wondered if the thermostat was wrong would that affect my mileage like that.
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yea
Dodge Dakota
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7/04/2004
11:56:20
| RE: Bad gas mileage after repairs
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holy $hit 220,000 is alot of miles. u never mag daks goin that far
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another mark
Dodge Dakota
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7/04/2004
14:36:18
| RE: Bad gas mileage after repairs
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cap and rotor ? i had a wire go bad and it caused a horrible idle,
get a spare and change each one out one at a time to isolate it
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93Dakota
Dodge Dakota
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7/04/2004
15:27:30
| RE: Bad gas mileage after repairs
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Yea: There are many Mag Dakotas around here with 200K+ and still going strong. Ive got 131K on my 93 and I can see it making it to 200K easily.
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fryeguy
Dodge Dakota
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7/05/2004
02:23:29
| RE: Bad gas mileage after repairs
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my 93 has 250,345 and just starting to show a little fatigue
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91Dakota
Dodge Dakota
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7/05/2004
19:52:30
|  RE: Bad gas mileage after repairs
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Mine is getting close to 200000 and still going. Just made a 16 hour road trip at 70 MPH!!
Check your EGR valve. Timing is very crucial. I gained almost 2 MPG when I reset the timing to 10 degrees. I have yet to change the TB posisition and MAP sensors. I think one of these is causing a small stumble when the engine is cold. The stumble was smaller after I changed the EGR valve.
Ever replace the rocker arms, arm shaft and push rods? I did it to mine after a rocker arm started to make tapping noises. I noticed a power gain and smoother idle.
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