TPS
New User
Joined: Nov 2002
Posts: 2
Likes: 0
TPS
Just changed the tps on the throttle body of a 302 with efi.can't make the idle receed to a normal range after warm up. Checked coolant flow to the throttle body and it appears normal. ANy suggestions would be helpful
New User
Joined: Nov 2002
Posts: 2
Likes: 0
TPS
checked the voltage and it reads 1 volt but idle speed is still high. checked linkage and damper. both these seem to be operating properly. still stumped, thinking maybe some pollution control sensor or bad wiring may be the culprit. whaddya think?
Moderator
Joined: Jan 2001
Posts: 56,995
Likes: 2,741
From: Virginia
TPS
With the engine idling, pull the wiring plug off the idle bypass solenoid. The engine should struggle a little and then die. If it keeps running with this unplugged, your idle stop screw is adjusted to far in. Back it off so it closes the throttle butterfly more, and then try it again. This adjustment will get the throttle in the range where the idle bypass solenoid can control the idle.
