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Originally Posted by SMarquez
Hi all, I have a 95 Astro, 4.3L motor that develeoped a "loping idle". It has a steady surge that lasts about 1 second. To describe it would be a thrum..thrum...thrum at idle in neutral. I don't have alot of time to Dx, because i'm supposed to leave town day after tomorrow. Thanks for your advice..
Steve
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On Weds. the engine ran rough and a code 32 "EGR" showed up. I pulled the EGR and found a piece of carbon rolling around so I think the weird idle was caused by this.