Hey guys, I have a 2002 blazer with a 4.3 and i was wondering what my idle should be at park and then in drive, thanks

 

850 +/- 50rpm depending on conditions (is the truck warm? how warm? etc.).

Set by screwing curb idle bolt out, then back in until the IAC takes over. Do this with a warm motor.

Do not use the curb idle adjustment to set the idle.

Josh <><

 

Is that 850 in park ? When i put it in drive it is around 500 , and the motor seems to run a little bit rough, Is that to low ? Thanks.

 

Hello,

That sounds a bit low. Pull the IAC and make sure it's not gummed up. Do NOT try to move the pintle (pointed thing) as it will ruin the part.

Take some carb cleaner and clean it (excepting any rubber parts) and clean out the hole it fits into.

You might also check to see if your EGR valve is functioning properly.

Josh <><