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[Solved] Emissions problems

  

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I have a 2003 Tacoma 4wd automatic transmission trd from new. I started having evap problems when they put a new frame on it. I've replaced canister purge valve, maf sensor. New OEM gas cap. All denso parts. When I fuel up it idles rough for several minutes then smooths out. 20 miles or so later the check engine light comes on. Also when I open the fuel cap there is audible vacuum. Then the check engine light is intermittent. Off,on,off,on. It's driving me nuts. What is your opinion? Thanks. 146,000 miles.


I forgot, 3.4l engine


Is the one in the engine bay the only one?


1 Answer
1

The evap canister valve is either not connected properly or not working properly.  Check all vacuum lines and connections.


Thanks Doc


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