ill check out the vct, cleaned the maf but didnt disconnect it,ill try that also,thanks

 

doesnt look like it has any connector on the valve covers, has a rubber line that runs from back cover to bottom of air filter box and that has some cracks but that appears to be a breather or something its about 1/2 inch to 3/4 rubber line so dont thinks its vacuum. Disconnected the maf, hard to tell if it got better..maybe but was still there especially if ac was on. Did notice that with the maf plugged in,seemed the idle dropped lower but not much

 

Ok, not an VCT engine. MAF sensor disconnect didn't resolve the problem.

That hose you discribed is the PCV breather.

IAC motor may be seen, and removed by lifting the vehicle, and looking up between the firewall, and the engine, under the throttle body. If not, remove parts around the throttle body to gain access to the IAC. It's on the bottom of the throttle body, almost completely underneath the intake plenum. Firewall side of engine.

 

what is the sensor just past the maf on the bottom of the air tube?

 

Past the MAF, bottom of the throttle body. Remove the air tube to gain access from the top. Lean over the driver's side fender, and practically lay on the engine to see the dang thing. It's a pita to unbolt. The EGR valve is probably in the way too since the car is not a VCT engine. Perhaps you'll want to remove that too since you're in there, and it needs service anyway. I know, I know...ugh!

(Note: IAC is not a sensor. It's an output device controled by the PCM.)

Question: What is the idle rpm's when the car is in Park?

 

you don,t suppose you have a lifter sticking, do you ? you might not notice it at fast idle like on the highway, just at idle ! if it is a sticking lifter then the valves would not open and close right !

 

no rpm gauge so i cant tell,i was actually refering to a sensor on the bottom of the air tube about 6 inchs past the maf sensor.

Bandit1948- i can be going 2mph as long as i have throttle on its smooth

 

Oh, my mistake, I miss read your question.

That would be an air temp. sensor. If that sensor was at fault you'd probably have other driveability and performance problems.

A smooth quality idle in Drive, regardless of loads put on the engine, like the AC, and power steering articulation, high beams, etc... is dependent on a properly functioning IAC motor.

 

ok,I see where it is,is it easier to get it from the bottom? Can I just clean it?
Also, typical symptoms ive dealt with iac on previous cars where always high idle from sticking so how would it cause a rough idle? Is there a way to raise teh idle on these car? Sure theres no idle screw but some other way?

 

Yes, it may be easier to get to from the bottom. Make an attempt, and see. Or, you may choose to go from the top. It really depends on the mechanic, space, and available tools.

If the IAC motor is dirty a through cleaning with plastic safe throttle body cleaner may do the trick. Make sure you also clean the throttle body ports, where the IAC attaches. You should see cleaner come out of the throttle body behind the throttle plate when you spray the cleaner into one of the IAC ports.

Check all hoses going into the throttle body, and PCV hoses, valve, and breather hose, and breather element. These componets should be clean and/or replaced too.