Question about 2000 Audi A4

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Blinking check engine light: Misfiring on

Blinking check engine light: Misfiring on cylinders 4,5,6. Replaced plugs. Problem has not gone away. What else could it be?

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My car was misfiring also. My mechanic reccomended using a few bottles of techron fuel injector cleaner, as my car was used alot previously for city driving. Over time, if it is not opened up and run good and hard at speed on the highway, they become clogged and it will misfire. I spent 30 bucks on two bottles, used it on two tanks, and all the hesitation and lights have gone away! It was awesome, hard tyo fiund a good honest mecghanic who will reccomend a 30 dollar fix that isnt even done by them, rather than a few hundred dollars worth of repairs that wont solve your problem.

Posted on Aug 10, 2009

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Sounds like you might have some wires crossed

Posted on Aug 01, 2009

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This will help.

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Hi there;

#4 Miss-fire. All the things you are saying make a lot of sense. When the light is blinking the cylinder is actualy misfiring, & the smell you are smelling is the fuel that is not burning in the engine burning in the exahst. This can cause a lot of damage to the exausht if it is not repaired..
There is still a couple of things that need to be checked, first he needs to check to see if it is possibly a fuel injector that is sticking. He can do this easily by moving the #4 injector to another cylinder & run the car. When it starts missfiring he will need to see if it is still #4 or if it is the cylinder that he moved the injector to. if it is the new cylinder it is obviously the injector, if it is still #4 he will need to look into the possibility of the EGR valve sticking open or some other issue to do with valve timing or low compression.
I hope this helps
Farrout!

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