1995 Nissan Quest Fast Idle

NUGGIEBOY51099

MEMBER
1995 NISSAN QUEST

Engine Performance problem
1995 Nissan Quest Front Wheel Drive Automatic 128, 00 miles

Yesterday I drove for quite a while with no problems. Made a lot of stops. As I was getting close to home I noticed my car was idling at around 1000 while stopped at lights (normally when I'm sitting at a light the idle is around 750). When I pulled into the garage and put it in park, the idle went up to 1500. This morning it seemed better at first but again started idling at 1000 when stopped at lights. When I arrived at work (about 30 minutes later) and put it in park, the idle went up to almost 2000. There was no air conditioning on either time and according to the thermostat, the engine temp was fine (not overheating or anything). What would be the most likely cause of this?

1 Reply

MERLIN2021

MECHANIC
17,250 POSTS

The only idle setting you can change is the idle switch, see if it helps.
IDLE SWITCH Disconnect idle switch. Connect ohmmeter between center and outer terminals. Check idle switch off/on speed, while closing throttle valve. Idle switch should turn on at 100-400 RPM. If idle switch does not perform as indicated, loosen idle switch hold-down screws and rotate switch body to set off/on speed to specification. Or the fast idle control device relay on the right front fender...