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Automotive question Wont pass inspection trouble code 420 no smoke from tailpipe, dont know exactly how to check for vacumn leaks

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  • yadayada
    yadayada May 11, 2010

    Why are you looking for a vacuum leak, P0420 is CATALYST 1/1 EFFICIENCY FAILURE ??



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White smoke comes out tailpipe when I romp on gas. wont pass smog visual test

Visual test fail is visual white smoke out of the tail pipe?
The engine seems to be burning something it shouldn't, such as coolant, brake fluid, oil. It may have a check engine light on or may not. Give it a leak down test and check for blown gaskets. Look it up in youtube or google it.

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2001 Ford E-250 has excessive oil consumption with no visible leaks and has a p301 misfire code

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My van is getting into the red is it the thermastat

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It's normal for the check engine light to be on when the car's engine is not running. If the car is turning over but won't start under its own power, then there maybe another problem unrelated to antifreeze being low in level. Did you ever notice white smoke coming from the tailpipe indicating a head gasket leak? If so, then the antifreeze is likely coming out of the tailpipe when running, or there is a slow leak in something say like the water pump gasket or shaft. It's a good idea to check what codes are tripped using an obd-II scanner to point you in the right direction. Good luck on this repair.

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