team... Here is what i got...
No codes but nasty nasty idle...

all tune up acdelco plugs wires cap rotor...
ign coil new..
battery new...
alternator runnin fine..

maf clean... iac new. map new. cat cvtr new.

whats should i do next

 

start testing the fuel pressure

96+ Fuel System Diagnosis - Blazer Forum - Chevy Blazer Forums

Possibly a leaking injector or weak pump or even a bad fuel filter

 

the injector spider is he new delphi model. the pump is a new delco one about 2 years old come june or july... and the filter i did last august.... ill buy a tester for the pressure

 

some auto parts lend the tool

 

change your transmission fluid and differential fluid. Then lift it haha

 

the transmission fluid was two years ago and imma doo the diff fluid in june... lift next june. when im done paying it off.... pretty simple for diff fluid?

 

imma go to an auto parts store and check it this weekend

 

How would the diff fluid cause a problem at idle?

Sounds like my blazer, and I'm fairly certain mine's due to a leak of the fuel system.

 

I think it would be helpful to understand what 'nasty, nasty idle' means. I can think of three ways it might seem nasty.

 

Start with something radical. Tap the base of the EGR a couple of times with a socket extension and hammer. I sh*t you not.