Question about 1989 Buick Electra
To stay in close loop o2 sensor have to be hot
and the converter catalyst is the one who keep the heat......
converter is it factory or never been change.
with scanner obd1 you should see the voltage variation of o2 sensor. it should go from lean to rich . .500mv is the middle then under .500mv is lean and over it is rich.......with this information ecm correct the fuel delivery
hope it helps
Posted on Sep 29, 2013
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Posted on Jan 02, 2017
It NEVER was the camshaft sensor! Unless, you've removed the engine lately, which I doubt.
RUN to Advance Auto Parts and buy a can of "SeaFoam" and add to your gas tank per instructions...drive at least 100 miles and the problem should go away...IF it doesn't you'll have to replace the O2 sensors in the exhaust system...Any good mechanic should be able to do this for much less $$ than the dealership DO NOT go to the dealer for repairs!
Posted on Jun 22, 2009
SOURCE: 2002 Buick Century Code P0420
Sounds as if yoou are actually having a fuel system problem.You need to rreplace the fuel filter and then check the fuel pressure. You should have around 50 psi. If the fuel filter stops up it will cause the exhast to starve for fuel and can damage a catalyst converter. You can get the fuel filter for about 15 dollars at any local parts house.
Posted on Jul 02, 2009
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