PaulW123 Posted November 15, 2016 Share Posted November 15, 2016 Hi all just recently my focus 1.6 tdci has developed a hissing sound under heavy load which at first i thought was a boost leak as it looses power when hissing, had it into the local garage who have said its defo not boost leak and that the hissing noise is coming from by the egr valve but couldnt pinpoint the problem as it was so small at the time, im after a bit of advise as to what this could be, few ppl have said it will be egr either staying open or staying shut, but i am at a loss as to what this could be other then the egr valve, My car is a focus 1.6 tdci (none dpf) on an 05 plate would be gfrateful if you could help, last thing i want is for the car to breakdown before christmas. Thanks Quote Link to comment Share on other sites More sharing options...
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