increasing idle speed

How do you increase the idle speed in a feul injected gasoline engine? The engine in question is a 1995 Pontiac Trans Sport mini van. 3.8 litre V6. It tends to stall when going downhill, more or less coasting. The idle is now around 500 rpm. I believe the stalling is due to an idle speed that's too low.

is it too early to say "Peanut Butter"??

it could very well be a tps sensor....also the car is obdII so you should be able to goto your local autozone and theyll run the codes for free

hey rainbow, there's an easy way to adjust it up. and ya 500 rpm is a little slow for idling. im using the FI 302 in my mercury as a reference so i might be a little off. take a look at the FI unit where the air hose attaches from the air box, see if you can find a small round adjustment, probably on the bottom of where the hose attaches. you'll most likely need a flathead screwdriver to turn it, and simply turn it slightly til it idles higher. its a good temperary fix but taking to an expert probably won't be a waste of time. i hope this helps you.