Question about 1996 Plymouth Neon
When hooked to a computer, the head code says 171. I've replaced the fuel pump and upstream oxygen sensor, but still having this problem. Car doesn't run well, it jerks when driving.
If good, clean fuel, good spark etc. 171 is lean mixture according to my sources.. Thus I'd say if engine is being told from O2 sensor that mixture is lean, that would explain all the extra fuel getting ( dumped ) fed to engine. I guess i"d start by changing O2 sensor. (Oxygen sensor.) If it has 2, do the one upstream, closest to engine on exhaust manifold or pipe.
Posted on Jan 01, 2009
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Posted on Jan 02, 2017
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