Mechanics

I JUST PUT A ENGINE IN MY CAR FROM THE JUNK YARD ITS A CHEVY ITS RUNS GOOD AND NICE AND QUITE

2003 Chevrolet Cavalier • 128,000 miles

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?
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Mannym
May 5, 2012.



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