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e.g.r. valve replacement fixed mine. symptoms where rough idle and "surged".
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Why does your 1998 blazer run rough at low idle?
The 1998 Blazer could have several problems causing rough idle. Check the air filter, fuel pressure, and EGR valve for a clog to look for the problem.
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What causes a 2000 sable to rough idle when cold but a smooth idle when engine is warm?
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