I have just changed my tstat and now I have no spark at all. I had to remove the serpantine belt but I did not remove the timing belt. I have checked all the electrical connections and vacuum and I cannot find the reason why it wont start. It started fine before and idled perfect but now I get nothing at all. People have suggested that it has jumped timing but this is not possible since I never removed the timing belt. Please help I am absolutly out of ideas.
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1994 Audi 90 Question: no spark after tstat change
Answer #1patrick mannion from Greg Solow's Engine Room, September 13, 2009, 14:20Master
It almost has to be an electrical connector that is disconnected. I wonder if plugging in a scan tool is going to be the quickest diagnostic test you can do. Plugging in a scan tool may show open airflow meter, or open crank sensor circuit. Do you have good repair information.
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Answer #2Visitor, May 27, 2011, 08:02
I think the crank sensor on these engines is in the area of where you were working, check that you did not accidentally unplug it as that would surely cause a loss of spark. Hope this was helpful
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