so i have replaced the cap and rotor along with the plugs. cleaned the TB and changed oil.

i still have a low idle after driving for a while. i have a 90 3.0 4runner.

i dont know what else to look at. the idle does not effect the drivability of the truck at all. it just shakes and is down around 300-400 RPMs.

any ideas

 

Have you tried adjusting your idle speed screw? just for kicks and giggles...maybe it got messed up

 

try adjusting it

 

i just had that problem today. adjusting your idle screw should fix it.

 

Bad coolant temp sensor? Could be faulty and when warmed up the sensor is still saying its cold? Does that make sense?