One or more coils may have failed , recommend replace all plugs and coils unless you can figure out which coils are bad.
SOURCE: Engine shakes when Idling/ Check Engine Light started blinking
i just fixed a similar problem on my van there is a rubber elbow on the end of the pvc hose that connects to the valve cover you can only buy the elbow with the hose and it costs about 100 bucks but i guess they have had to replace a lot of these because the new one looks twice has strong you just have to check and see if its collapsed in on itself preventing air movement or leaking the shop will charge you 175 dollars to fix it plus the part but it only takes 20 minutes good luck
SOURCE: 1998 Audi A4, engine shakes/runs rough sometimes
It sounds more like you've got an intermittant vacuum leak. Try, with the engine running, spraying some WD-40 or any kind of penetrating lubricant spray,over the intake manifold area and any related vacuum lines. If you hear the engine strat to stumble, providing you're not shooting directly into the air box, concentrate the spray on that area until you're able to pinpoint a loose, cracked. or off, vacuum line or hose.
SOURCE: 2004 subaru forester, 99,000 miles. Check engine
Drop in to an Autozone, or Pep Boys, or similar big parts store & they will usually scan for codes free. This will hopefully eliminate all the guess work, or at least point everyone in right direction for better diagnosis. If not obvious from codes what the problem is, get back to us and we'll help you out.
Testimonial: "Thanks for the great suggestion . I'll have Autozone read the codes on Monday. Thanks again!"
SOURCE: Shaking engine, weak power, blinking check engine light
You have a bad coil pack, they usually crack from age and heat. It's best to replace them all. Check for a VW recall on this item.
SOURCE: My check engine light is on and it often shakes
Bring it in so that the check engine light will be off and it will run smoother.
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