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Old 01-29-2011, 07:19 PM   #1
Hunterselect
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Burning Fuel need help!

So I got 95 325i Automatic, 323,500 kms, and the fuel consumption is getting worst. I did a tune up, valve cover gasket, 2 serpentine belts, O2 sensor, Engine flush, motor vac, spark plugs, spark plug connectors, Fuel filter, oil change to synthetic 5W30, and oil filter. The car drives so much smoother, quicker response, but still the gas gage is depressing. I don't drive hard, what else should I look at? I'm looking at 350 km/Litres a tank, should be better than this!!
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Old 01-29-2011, 07:47 PM   #2
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Check each wheel to see if it's dragging.
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Old 02-03-2011, 09:32 PM   #3
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Quote:
Originally Posted by Hunterselect View Post
So I got 95 325i Automatic, 323,500 kms, and the fuel consumption is getting worst. I did a tune up, valve cover gasket, 2 serpentine belts, O2 sensor, Engine flush, motor vac, spark plugs, spark plug connectors, Fuel filter, oil change to synthetic 5W30, and oil filter. The car drives so much smoother, quicker response, but still the gas gage is depressing. I don't drive hard, what else should I look at? I'm looking at 350 km/Litres a tank, should be better than this!!
I get about the same mileage on my '94 325i in city driving. But it gets a bit better, around 500-600km/tank on hwys.
I also did a tune up last year when i bought the car, replaced most of the items you have mentioned.

One of the reasons that its drinking gas might be in fact with the 6 cylinder...
in reference with a friend who owns a '04 330i, which is a newer and more powerful model, also gets similar mileage/tank like mine in cities and hwys.

Last edited by Kickstartt; 02-03-2011 at 09:34 PM.
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Old 02-03-2011, 09:55 PM   #4
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Long shot but also check the coolant temp sensor (not the gauge sender but the ecu temp sensor). The ecu might think the engine is perpetually cold and running it rich open loop for warmup.
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Old 02-03-2011, 10:55 PM   #5
Bullet Ride
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Long shot but also check the coolant temp sensor (not the gauge sender but the ecu temp sensor). The ecu might think the engine is perpetually cold and running it rich open loop for warmup.
You'd also be able to verify running rich by checking the colour of the plugs
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Old 02-04-2011, 12:30 PM   #6
Hunterselect
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Thanks Guys, I'll check all these things and let you know how it turns out.
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Old 02-12-2011, 08:36 PM   #7
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Quote:
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Check each wheel to see if it's dragging.
If he was dragging, he'd be pulling to one side....
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