replaced my catalyc converter, was discolerd inside. they said i was burning too much raw fuel.

2001 CHEVROLET MALIBU
140 MILES • 3.1L • 6 CYL • 2WD • AUTOMATIC
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JOHN912
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burning too much raw fuel, keep having catylic failure. I replaced the following; map sensor,egr valve,catylic convertor,coil packs,plugs, wires, fuel filter, fuel pressure regulator, temp sensor, both the up and downstream oyx sensors. still having same problem. please help me, thank you.
Feb 25, 2015 at 9:43 AM
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HMAC300
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scan for codes and check fuel pressure with a gauge auto parts rent it
Feb 25, 2015 at 9:50 AM
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JOHN912
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I will rent tool to check fuel pressure, my code is po420 catylist system below threshold. bank 1.
Feb 26, 2015 at 10:34 AM
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HMAC300
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that is the converter on lh bank also check for an air leak as it will setthe same code. if you replaced that converter and didn't weld it on that may be the problem. also check for an air leak leading to throttle body.
Feb 26, 2015 at 12:02 PM