Hello I have a 00 blazer lt 4x4 it has one code secondary air I was wondering if that had anything to do with the pick up if it doesn't what will I replaced spark plugs wires d cap fuel filter and air filter and it still doesn't run like it should

 

Have you tried to clean the MAF sensor? Some one please correct me if I'm wrong but I don't think the secondary air system will have a negative impact on performance.

 

The AIR system, or air injection, is used for emissions. It re-starts the burn to burn the HC and heat up the cat at cold start up mostly. No negative impact on driveability. Like 50lb cat said start with cleaning the MAF, don't touch the resistor's directly. If that doesn't help I would check 02 sensor output, idk if there narrow or wide band on the pre-cat. Should be dithering below 100mv and above 900mv for a healthy sensor. Next I would check fuel pressure KOEO, then key off and it should maintain pressure for a few minutes. GL!

 

I heard that it could be a fuel pump or intake gasket I just don't understand why when it's cold it almost want to stall but never does but when it warms up a little it run better but still not what it should have anyone? Answers! Plz

 

Try unplugging the MAF sensor. If it runs better then you need to clean the wires inside the maf with some maf sensor spray cleaner. Don't touch the wires!

 

I tried that that work I have a 4x4 problem also it will work in 4 but soon as u drive a mile the service engine light on and my blazer stuck on heat when I turn it to 65 its still super Hot it has that smart cilmate control