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Old 12-07-2015, 07:34 PM   #1
dwcardfan
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Join Date: Sep 2013
Location: Strawberry Arkansas
Posts: 1,137
Rough idle 5.3
Just finishing up on my 5.3 / 4l60e swap into my 65 GMC. It runs good but has a rough idle. The codes are p0170 and p0174. Bank 1 and 2 are lean. It has new 02 sensors and there are no vacumn leaks. Fuel pressure is 58. Any ideas?
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