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GS - 3rd Gen (2006-2011) Discussion about the 2006+ model GS300, GS350, GS430, GS450H and GS460

Plug foulers and 420, 430 codes...creating a project car ugh

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Old 05-06-22, 11:18 AM
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matrickage
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Default Plug foulers and 420, 430 codes...creating a project car ugh
2006 gs300...trying to buy time to save up for new front cats...ended up gutting the ones I have because they were clogged with a 420 code after 200 mi and the infamous rotten egg smell...

After installing foulers without drilling them out now I'm getting 430 AND 420 codes...

I love this car, I don't want to turn this into a heap project car that needs attention all the time...

Should I drill the foulers out?

Any advice is appreciated 👍
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Old 05-06-22, 04:47 PM
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verly6565
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yes always
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Old 05-10-22, 09:01 PM
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matrickage
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well that didnt work
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Old 05-16-22, 06:37 PM
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Worked for me check if you have a exhaust leak
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Old 05-16-22, 08:53 PM
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no leaks... new exhaust manifold gaskets... still getting teh rotten egg smell at WOT, so im thinking the back cats are clogged also
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