Befor you say it, it is NOT IAC! So please don't tell me "clean your IAC"
With that said, here is the issue
2 months ago or so, i tried to install MAC75mm TB. It was not to be. nasty idle hang up, and high idle and after week or so driving around hopeing it'll fix itself, as i was told by many, i gave up and reinstalled OEM 65mm. After resetting PCM, and week or so driving, it suddenly fixed itself.
After 2 weeks or so after that, I tried 75mm again. this time i spent more time sealing up the TB, and this time it worked! but week or so after that the greedy monkey that i am, i sold the TB to member here. and OEM 65mm fond home in my car yet again.
that was almost month ago. and after all that time, and about 400miles later, i'm still having Idle issue. and PCM is refusing to do what it took about week and 50 miles of driving this time around
So here are what itsdoing.
1-when i start the car cold, it'll idle at around +1200RPM, and come down to about +800RPM as engine worms up(this is normal). as soon as you starts to drive around, it will not idle at 800RPM. But idle at +1000RPM. and stay there until i shut off the car again, and starts it back up. then it'll idle again at +800RPM, and repeats what i'v just discribed.
2-when i'm idleing at either +800RPM or +1000RPM, if I turn A/C on, then idle will come down to about +750RPM(this is also normal)
3-Either with or W/O A/C on, and regardless of idle RPM, if i brip the gaspedal in neutral, it'll stop at around +1400RPM. It'' raise RPM with this sound of air serging(I guess). and hang there for about 2~3 sec, and then comes back down to what ever the RPM was previoulsy(either 800RPM or 1000RPM. If i only give the gas until about 1100RPM, and let it go, it'll continue to rise its RPM until 1400RPM on its own. This suck azz, because....
5-Appearently, this serge of Idle is going on even when I'm driving around in any gear. Infact, i can drive around in 5th gear(or any gear for that matter) at around 1200RPM without touching gas pedal. its like having crouise control on.
6-While I'm driving around at any speed, and i disengage clutch, RPM will stay at 1400RPM. infact if i'm coasting down to stop in neutral from any speed(25mph ot 65mph), it'll stay at 1400RPM until i come to complete stop. then once i'm at complete stop, it'll stay a 1400RPM for about second, and then come back down to 1000RPM(Or 750RPM if I have A/C on.
7-While i do number 5 above, sometimes RPM will fractuate up and down between 1400RPM and 1000RPM. wen its dropping RPM from 1400RPM, it'll make sort of gerggle sound - and as soon as it hit 1000RPM, then it'll shoots back up to 1400RPM, then starts to come down, to about 1000RPM with sound and repeates itself. But this is not everytime.
I can use any imput here guys!! what should i check?
There are
No CEL
Again, IAC is working okay
With that said, here is the issue
2 months ago or so, i tried to install MAC75mm TB. It was not to be. nasty idle hang up, and high idle and after week or so driving around hopeing it'll fix itself, as i was told by many, i gave up and reinstalled OEM 65mm. After resetting PCM, and week or so driving, it suddenly fixed itself.
After 2 weeks or so after that, I tried 75mm again. this time i spent more time sealing up the TB, and this time it worked! but week or so after that the greedy monkey that i am, i sold the TB to member here. and OEM 65mm fond home in my car yet again.
that was almost month ago. and after all that time, and about 400miles later, i'm still having Idle issue. and PCM is refusing to do what it took about week and 50 miles of driving this time around
So here are what itsdoing.
1-when i start the car cold, it'll idle at around +1200RPM, and come down to about +800RPM as engine worms up(this is normal). as soon as you starts to drive around, it will not idle at 800RPM. But idle at +1000RPM. and stay there until i shut off the car again, and starts it back up. then it'll idle again at +800RPM, and repeats what i'v just discribed.
2-when i'm idleing at either +800RPM or +1000RPM, if I turn A/C on, then idle will come down to about +750RPM(this is also normal)
3-Either with or W/O A/C on, and regardless of idle RPM, if i brip the gaspedal in neutral, it'll stop at around +1400RPM. It'' raise RPM with this sound of air serging(I guess). and hang there for about 2~3 sec, and then comes back down to what ever the RPM was previoulsy(either 800RPM or 1000RPM. If i only give the gas until about 1100RPM, and let it go, it'll continue to rise its RPM until 1400RPM on its own. This suck azz, because....
5-Appearently, this serge of Idle is going on even when I'm driving around in any gear. Infact, i can drive around in 5th gear(or any gear for that matter) at around 1200RPM without touching gas pedal. its like having crouise control on.
6-While I'm driving around at any speed, and i disengage clutch, RPM will stay at 1400RPM. infact if i'm coasting down to stop in neutral from any speed(25mph ot 65mph), it'll stay at 1400RPM until i come to complete stop. then once i'm at complete stop, it'll stay a 1400RPM for about second, and then come back down to 1000RPM(Or 750RPM if I have A/C on.
7-While i do number 5 above, sometimes RPM will fractuate up and down between 1400RPM and 1000RPM. wen its dropping RPM from 1400RPM, it'll make sort of gerggle sound - and as soon as it hit 1000RPM, then it'll shoots back up to 1400RPM, then starts to come down, to about 1000RPM with sound and repeates itself. But this is not everytime.
I can use any imput here guys!! what should i check?
There are
No CEL
Again, IAC is working okay