my car idles at 400 rpm?

[98 EB xploder]

how do i make it idle higher? its a 98 eddie bauer explorer 4.0 SOHC
i bought a h/o alternator but it sits at 11.8v at idle, but when i bring it up to 600-800 rpm it kicks right up to 14.8. so instead of sending it back to get re-tuned i was wondering if theres something i can do to up the rpm's
thanks alot

 

[98 EB xploder]

any ideas?

 

[XLT]

Not sure but i thought i read somewhere that the throttle body had an adjuster on it. You could play around with that and possibly up the rpms at idle a little bit.

 

[98 EB xploder]

Not sure but i thought i read somewhere that the throttle body had an adjuster on it. You could play around with that and possibly up the rpms at idle a little bit.

i looked but i didnt see anything, i guess i can take another look, thanks

 

[my98nnj]

The idle speed should be controlled by the IACV. Perhaps thats not working correctly.
Try cleaning it or replacing it. You can also clean the throttle body, especially around the throttle plate. I would not adjust the default throttle stop.

 

[2000StreetRod]

Idle adjustment procedure

If your engine runs smoothly but the idle speed is too low then I suggest that you perform the Idle adjustment procedure after cleaning the IAC valve.

 

[98 EB xploder]

all fixed, its rigged but it will work for now, the throttle body has a stopper on it where the throttle rests at when not pressing the accelerator, i just rapped some duct take around the stopper to give it a little space and now it idles at 800-900 rpm.
but like i said it will work for now, thanks guys
btw while im here can someone tell me which one is the 5th cylinder?

 

[98 EB xploder]

If your engine runs smoothly but the idle speed is too low then I suggest that you perform the Idle adjustment procedure after cleaning the IAC valve.

thanks for the link, mine looks similar to the sic but i dont have the screw, i have a little black piece of plastic thats permanent, not adjustable, but what i did is where it curves and hits the screw in the pic, i just rapped tape around it to space it out a little bit, (if that makes sense)