rich gas code 172 have changed throttle pressure sensor, maf ,spark plugs and wire air filter,front o2 sensor what more can i do. 2008 chevy impala 3.5 l
What is your question?
just sitting light comes on in idile, and reads rich fuel bank 1 which is a new o2 sensor, but reads incomplete. on the code reader .does not feel right when driving. there maybe a humming noise. vibrant while driving, could a vaccum leak cause a rich running code.
What makes this problem better or worse?
driving just does not feel right
How long has your 2008 Chevrolet Impala had this problem?
RepairPal Certified shops can diagnose and repair your 2008 Chevrolet Impala. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
Hello, vacuum leaks would cause a lean running code, not a rich one. You would be looking for an air restriction - not abundant air. Or, too much fuel being delivered without being commanded, such as a stuck open fuel injector. It's definitely a concern that must be resolved - so it might be that some hands on professional testing is warranted.
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