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    1. 01-17-2018 09:53 PM #1
      I am a new diy mechanic... The check engine light is on. Sometimes it flashes and sometimes it goes away. The diagnostic says that it is a cylinder misfire and the cylinder that is misfiring changes with each diagnostic but at some point each one has misfired. I have replaced the spark plugs twice and the wires twice and the light (and hearing/feeling it misfiring) stops for a few months but then starts up again. Any ideas what this could be? Have you experienced this before?

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    3. Member jtrujillo86's Avatar
      Join Date
      Aug 21st, 2005
      Location
      Denver, CO
      Posts
      2,116
      Cars
      2016 Jetta 1.8T SEL, 2016.5 Mazda CX-5 Touring, 2002 Passat GLX V6 4Motion
      02-04-2018 04:29 PM #2
      It sounds like you have a bad cam chain tensioner. When I bought my 2002 Passat it had 206k miles on it and a nice check engine light that was on steady, but would flash under hard acceleration. One of the cam chain tensioners was worn, not putting enough pressure on the chain, causing it to slip. Have this checked out ASAP, as it could cause valve damage if it gets bad enough.

      - Jeremy.
      Quote Originally Posted by BluMagic View Post
      It's a VW; the sensors are as sensitive as women on that time of the month . . . and the dash is as anxious to light up as a stoner.

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