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#1
01-29-2007, 08:22 PM
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Gas mileage problem
For some reason when I drive on the highway after about 40-60 miles I will get a check engine light and my mileage will be about 13 mpg. I can drive 60 miles in and around the city and get about 15 mpg and not get a check engine light also. I cannot get the check engine light checked because whenever I turn the engine off and turn it back on the light will be gone until I drive about 20-40 miles.
Does anyone have any ideas what could be causing this??? the only one I can think of is the o2 sensor which happens to be good and stuck in the exhaust pipe. This is really killing me whenever I have to make a long drive.....
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92 S10 Blazer Sport 4.3l Vortec V6 (W) 275,000 miles Jasper engine, Rebuilt tranny + rearend 04 Pontiac Grand Prix GT 43,000 miles 
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#2
01-29-2007, 09:50 PM
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Re: Gas mileage problem
check out this posting. seems to be the same thing with a happy ending.
http://www.automotiveforums.com/vbul...d.php?t=666067
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