VW Tiguan 2010 misfire
20

Asked by StarJ20 Jun 18, 2019 at 10:42 PM about the 2010 Volkswagen Tiguan

Question type: Maintenance & Repair

Started with cylinder 1 misfire code about 6
months ago on tiguan. Could feel it "misfire" when
driving. Replaced spark plug for cyl. 1 .... did not
help. Replaced cyln. 1 coil.... could feel somewhat
of a difference but engine light still on.  .....then
EPC light comes on....
Flash forward..... over 6 months we have taken it to
5 mechanics... changed the pcv valve 2x....
changed the fuel injector on cylinder 1...  changed
all spark plugs and coils, had walnut blast for
carbon build up by dealership.....  and still EPC light
is on and engine light is flashing. Car shakes bad
when u start it or try to drive it!!!! I am at a real loss
.... I had compression teat done when fuel injectors
were changed and mechanic said no issue... ( that
was before DE carb....not sure if that means
anything)  I have asked dealership to look at timing
chain due to resent lawsuit .. but they say it will
cost over $1000  to tear it down to look at it. ...  
Just don't know what to do next.... any help ??

5 Answers
30

Greg answered 3 years ago

Carbon build-up on the intake valves. Both my Tiguans get that dreaded misfire code when I go too long without having it removed. I've had it start coding out at 30,000 miles on one and as high as 75,000 miles on the other. There's no getting around it, these direct injection engines have to have the carbon removed regularly, one of the crappy things about direct injection.

3 people found this helpful.
Mark helpful

JoePaul03 answered about a year ago

@Greg--I am pretty much a layman here...how does one go about cleaning the carbon build-up on the intake valves? (Or anyone else who knows, that would be excellent to know and appreciated!)

Mark helpful

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