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Rough idle possible running lean

Tiny
PEARLHICKORY
  • MEMBER
  • 1998 CHEVROLET CAMARO
  • 97 MILES
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.
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Tuesday, September 25th, 2012 AT 10:51 PM

5 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
First thing I would check for is a vacuum leak from the symptoms sounds like you have one.
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Tuesday, September 25th, 2012 AT 11:14 PM
Tiny
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  • 69 POSTS
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.
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Tuesday, September 25th, 2012 AT 11:20 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
Spray carb spray at idle and listen for the engine rpms to go up down or the engine to. Stumble or die.
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Wednesday, September 26th, 2012 AT 12:00 AM
Tiny
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  • 69 POSTS
I already did, I can hear a hissing from backside of motor cannot locate it. Looking for the pcv valve now.
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Wednesday, September 26th, 2012 AT 12:50 AM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
Did you find the pcv yet?
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Wednesday, September 26th, 2012 AT 3:58 PM

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