Running Lean

[HuskieMobileMan]

What are some of the leading reasons why a TBI system would be running lean? My injectors spray pattern look good. When I pull the plugs they look very white and I definitely need more fuel. I replaced my O2 sensor a couple of years ago. Could a computer replacement help? Thanks!!!

[dewfpo]

Vacuum leak, bad MAF sensor, Lazy O2 sensors, worn injectors.........

 

A computer replacement would be a waste of time.

 

DEWFPO

[redvett]

You better have someone with a scanner thet reads instant data and read all the info to see if the vehicle is really doing what you think its doing. Just a clean plug isnt proof that the engine is running lean. Fuel can make the plugs look real clean. As fuel economy worse? Is there a driveability problem?

[getcrunk88]

WAYYY to many things to list but i would start out checking the simple stuff

[TEE]

Go to cfm-tech.com and they explain it very well