at 600 rpm. I think in gear its at about 550. There is no way to adjust the idle speed as far as I know. Changing the throttle stop screw seems to have no effect on idle speed.
There is something under the throttle body you adjust the RPM with. I believe someone said to adjust idle you are supposed to unplug either the TPS or IAC (can't remember) to where the engine is barely running. Then plug it back in and you're done. Me, I go ahead and bump it up just a hair after that.
__________________ 1986 F-150 5.0 EFI XLT Lariat 4x4 NP435/NP208/9" 3.50
"Custom Exhaust" and leaf spring overloads
31x10.50 15" Nothing special, but it's a damn good truck.
It is the IAC you disconnect. Like Freaksh0w said you get it to where it just barely will idle on its own and then plug the IAC back in. I sometimes bump mine up just a hair also, but when Im done I always unplug the battery cable for 15 or 20 minutes to reset the computer and then take it on a spin for a few miles to get everything to get there settings back. Im not sure if unplugging the battery and reseting everything is needed but I always do just because Im not sure if the IAC will be trying to work off of the previous settings or if it just goes by how it is set.
__________________
Blake
1986 F150 XLT Lariat 4x4 302 EFI - 120,000 miles, many mods
1998 F150 XLT 4.6 - 99,000 miles, all stock
1988 Ranger 4x4 - 146,000 miles, fun truck
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