Audi Repair Questions? Ask a Mechanic for Answers ASAP
yes a sticking EGR valve would create this sort of issue
So check the connections to the EGR valve, if either the vacuum pipe of electrical connection are damaged / corroded then the EGR can be on all time which certainly will hurt performance. Its also possible that its a fault with the EGR valve so its worth removing the valve and cleaning it out with brake cleaner, if it looks particularly clogged then replace it.
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