98 Camaro Z-28, LS1 motor, 97k, auto. Vehicle starts up fine, has rough idle, pulled codes, #174 Bank 2 lean, # 300 Generic, multiple cylinder misfire, cars runs good, excellent pickup, but at an idle its very rough kinda like it wants to cut off but doesnt.
ANY ideas, would help thanks.
First thing I would check for is a vacuum leak from the symptoms sounds like you have one.
September, 25, 2012 AT 11:20 PM
I was looking around the engine, bay, I CAN HEAR ONE, cannot locate, it, ive shot cab cleaner in area and stuck my head as much as possible put a pipe to listen thru it and cannot find, but I can can hear hissing.
September, 26, 2012 AT 12:00 AM
Spray carb spray at idle and listen for the engine rpms to go up down or the engine to. Stumble or die.
September, 26, 2012 AT 12:50 AM
I already did, I can hear a hissing from backside of motor cannot locate it. Looking for the pcv valve now.