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#1
04-10-2010, 03:36 PM
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1991 s10 help
i have a 1991 s10 2.5 4cyl 5 speed i keep getting trouble code 25 ATI sensor/high air. i change the MIAT sensor and the air temp sensor and i still get the code. my vacuum motor works above the heat stove but i cant figure it out. its bucks really bad under at about 25mph and i tried to get it smog and its running rich ant the 25mph test but not the 15mph test. can anyone help me?
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#2
04-10-2010, 04:39 PM
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Re: 1991 s10 help
Does the truck idle rough? If it does you could have a bad MAP sensor. I have 1988 s10 2.5 and it idle rough and coughed and puked. I put a MAP sensor in and it ran better. I had to do the same with my 1994 s10 too.
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