I just put a engine in my car from the junk yard its a 2003 chevy cavalier its runs good and nice and quite

2003 CHEVROLET CAVALIER
128,000 MILES
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MANNYM
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I just put a engine in my car from the junk yard its a 2003 chevy cavalier its runs good and nice and quite but after i drive it for like an hour it starts to act funny like if i sit at a light it feels like it wants to take off by its self and now my engine light came on i checked it with the OBD2 and i got codes PO170 and PO171 what does this mean and what can i do to fix it?
May 5, 2012 at 3:15 AM
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ASEMASTER6371
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  • ASE Certified Mechanic
it is a long term trim codes. you need a shop with a scan tool to monitor these readings.

check for any vacuum leaks.

roy
May 5, 2012 at 3:20 AM
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