Thread: 99 tahoe tapping noise -egr?
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Old 02-10-2003, 03:09 AM
cobra1 cobra1 is offline
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the egr doesnt open at idle, and ive never heard of one making noise. my guess is you have a lifter that is unloading.the noise will go away after the lifter loads back up.

an egr thats open at idle will cause very rough running/hard starting.
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