Help with PCM data from scanner
11-19-2010, 05:33 PM
#1
Help with PCM data from scanner Ok some of you have seen my leaking LPP header thread and now I need help with some Live data I got from my scanner. I need to make sure that the header leak is fixed by reviewing the data. Question is how do I know what lean and rich are? For example I did a quick data log and it shows that my long term fuel trims are
Bank 1= 18.75
Bank 2= 23.44
And how do I figure out what the O2 sensor values mean? I am a complete **** when it comes to this stuff but if someone can explain what I should look at and what it means it will help alot. I am reading through the scanner manual but it isn't helping me figure out what the values mean once I get them.
Bank 1= 18.75
Bank 2= 23.44
And how do I figure out what the O2 sensor values mean? I am a complete **** when it comes to this stuff but if someone can explain what I should look at and what it means it will help alot. I am reading through the scanner manual but it isn't helping me figure out what the values mean once I get them.
11-19-2010, 05:59 PM
#2
+ fuel trim numbers means the pcm is adding x% additional fuel. Oxygen sensors will be constantly switching between .1-.9 volts. Most scanners aren't fast enough to properly check oxygen sensors though. Idle trim numbers with a cam can be very misleading due to the overlap.