PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

lean condition

Old Apr 8, 2014 | 04:00 PM
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Default lean condition

I have a stock internal ls1, only mods are lts, vic jr intake, aarons elbow and a 92k tb. I have a lc1 wideband and on startup it is around 14-15 then immediately shoots up in the 18-20 range. Would any of those mods cause that lean issue? Just curious before I start adding fuel. Thanks
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Old Apr 8, 2014 | 08:26 PM
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AIR pump may be active and jacking the readings.
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Old Apr 9, 2014 | 06:40 AM
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Thanks for the reply, I thought it was disabled but it was set at 14. I set it to 284° and ill load the tune in a few and see what happens. I dont have a AIR pump on the car so not sure if it matters

Last edited by LsoneGT; Apr 9, 2014 at 06:51 AM.
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Old Apr 9, 2014 | 10:29 AM
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Well, if it's not there then it doesn't. Description said
"only mods..." and did not mention.

You might look to the NBO2s for verification. My LM-1
freaks out after cranking drops voltage and takes a
while to come back around and produce the right output.

Any cold misfiring / incomplete fuel vaporization can also
bump up indicated AFR.
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Old Apr 9, 2014 | 11:15 AM
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Sorry for the misunderstanding, my fuel trims and nb02 readings seem fine.
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