Running Lean

Running lean after the car has warmed up maybe a half hour of driving. What should I check?

Do you have any tuning programs? Is it lean at WOT, or at idle? Need way more details to help.

Runs Lean At Idle And No Programs.

how do you know it's lean at an idle? Has the car been tuned by anyone? If it is indeed lean at an idle, you may have a faulty o2 sensor. What year is the car?

The car is a 96 Z28. No fine tuning. I have a 224/230 cam all the bolt ons and an s trim supercharger. I put the supercharger on about 3 weeks ago. It ran fine for a while. Just this weekend the engine light came on so I scaned it. The code was a P0174 and a P0172. I monitored the 02's with the scanner the both read .06v. Is it possible that the boost caused an intake leak? The 02's only read lean at idle.

If you are looking at narrowband o2's they are not gonna read right. At an idle they should be bouncing all over the place. Either get a wideband, or see what the o2 are reading at WOT. The car definitely is gonna need to be tuned though with your setup. Although I'm not as familiar with tuning LT1's.