2001 Silverado rough idle - Engine Troubleshooting


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2001 Silverado rough idle

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Auto Repair Home>> Automotive Repair>> Engine Troubleshooting

Jim01
New User

Feb 19, 2013, 2:34 PM

Post #1 of 3 (1965 views)

2001 Silverado rough idle	Sign In

2001 Chevy Silverado, 4.8, 125k

Engine idles very rough and slow upon start when temps are in 30's and below. Runs great after a few minutes. 2 mechanics have been unable to pinpoint problem. Engine code reads "Lean Bank" and will not reset. I have replaced Fuel pump and filter, MAF, wires and plugs, all 4 o2 sensors. Throttle body butterfly is clean and the intake is not leaking.

Thanks for any help!!!

Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Feb 19, 2013, 3:08 PM

Post #2 of 3 (1949 views)

Re: 2001 Silverado rough idle	Sign In

A smoke test may be what it's going to take to find any vacuum leaks.

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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.

Jim01
New User

Feb 19, 2013, 5:09 PM

Post #3 of 3 (1925 views)

Re: 2001 Silverado rough idle	Sign In

Thanks, never accured to me. I will go that direction.

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