Help with chasing down a lean condition
#1
Help with chasing down a lean condition
Hey guys, looking at curing a lean condition I am seeing in my 05 LSJ Cobalt SS. I noticed my LC1 was bouncing around 17-19.1 while cruising about a week ago. Aside from my excitement from the better fuel economy I figured my MAF was dirty. I cleaned that to no avail. Next, I pulled the wideband and did a free air calibration which didn't help. Under boost it does go to 12.x and during cold starts it acts normal as well. I used HPTuners to command Open Loop while driving, this didn't help. I also did a cylinder balance to see if it could be a bad injector and they were all within a couple percent.
I am stumped on whats next; injectors or 02 sensor. I am throwing no codes to help diagnose this issue. Any pointers would greatly be appreciated.
Info: 2.8 pulley, 42lb injectors, ZZP header and Injen CAI
I've had this setup for over a year with no issues
I am stumped on whats next; injectors or 02 sensor. I am throwing no codes to help diagnose this issue. Any pointers would greatly be appreciated.
Info: 2.8 pulley, 42lb injectors, ZZP header and Injen CAI
I've had this setup for over a year with no issues
#4
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Join Date: 01-03-13
Location: Nova Scotia, Canada
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Im having the same issue, The car never goes lean under WOT but when driving around sometimes it will go right to 17 on my wideband (aem) and stay there with no power..then it will come out of it and act normal.
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