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07-23-2008, 02:57 AM	#1 (permalink)
crankenfurter Junior Member Join Date: Jul 2008 Posts: 1	failed emissions Vehicle is a 1988 Nissan pickup, 4 cylinder, gas engine, manual tranny. I failed carbon monoxide but passed hydrocarbons and oxides of nitrogen: HC: grams/mile Average "pass" reading: 3.00 Vehicle reading: 2.12 NOx : grams/mile Average "pass" reading: 4.50 Vehicle reading: 2.33 Carbon Monoxide : grams/mile Average "pass" reading: 25.00 Vehicle reading: 30.11 Any thoughts out there as to what I should adjust first? Thanks in advance, James

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