Hey I'm new to the fourm and lacking much knowledge about this stuff. But i have a 2001 chevy blazer 4x4 with 220xxx miles, has a k&n air filter and thrust exhaust. New plugs wire cap and rotar. My problem is I am getting some codes such as 0155 and 0135 and also a 0499 and 0300. Well I have read about these until i can't see stright, so I decided to barrow a scan tool from a buddy and get some readings at idel and motor warm and see if any of them stand out to you all or any I should be concerned about...

Rpm- 636
Load- 2%
MAP- 4 psi
MAF- 4.7 g/s
Baro- 14.2 psi
Spark timing - 15-18
Air fuel ratio- 14.6

That is about all that I thought might be important that it reads, any help would greatly be appreciated, I know a lot of this has probably been gone through in this thread but I don't understand a lot of what I'm reading so I thought if I could get some input on my specific truck it could clear some stuff up. Thanks!

 

We will need all of the diagnostic trouble codes, (DTC's) in the order they are retrieved. The data you posted is about 10% of what we need to see to make any kind of analysis. We need as much data as your scan tool will display. A brief description of the symptoms you're having, and the manufacturer of the parts that were replaced, (what brand are they?) would be very helpful.