Question about Pontiac Bonneville
i know this may sound obvious, but have you changed the air filter.
this is the most common reason for high emissions on any vehicle, and is very often forgotten, especially on bikes.
also, make you get the engine and exhaust up to temperature before an emission test as the catalytic converter will not work until quite a high temoerature has been reached.
i take my vehicles for a 10 miles run before an emission test, and if i am waiting for too long before the test, i will start the engine about 5 minutes before the test is done to make sure everything is at the right temperature
Posted on May 18, 2011
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Posted on Jan 02, 2017
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Sep 14, 2015 | 2002 Nissan Maxima
No the stalling is caused by something else like a dirty fuel filter of bad fuel pressure due to a worn fuel pump. With a bad O2 and MAF sensor the ECM will go a on open loop mose for those sensors causing bad performance and gasmileage. Replace the O2 sensor and try cleaning the MAF with MAF cleaner and check the wire harness, look for any damages to the wires and replace if needed. As for the stalling, try replacing the fuel filter first and we can go from there. Keep me posted, be glad to help get your car running 100% and save you some money the same time.
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