Quote:
Originally Posted by steve99
Check you didnt over oil the perrin filter and possibly got oil on maf snsor.
Or you have intake leak, check hoses unde manifold
You shouldnt get those codes just P0420, unless you got other hardware issues
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I didn't oil the filter. It's quite new. I also cleaned the MAF with MAF cleaner when I installed it back then.
I did a smoke test in the intake, theres no leak.
What hoses under the manifold are you referring to?
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