Erratic Idle - When starts the idle is about 1100 RPM as it warms up, it goes to 700 - 400 RPM

Asked by Sep 09, 2012 at 04:49 PM about the 1995 Toyota 4Runner 4 Dr SR5 V6 4WD SUV

Question type: Maintenance & Repair

I've replaced the Throttle Body Assy., Vapor Canister, Fuel Pressure Regulator, Distributor Cap, Ignition Rotor, Spark Plugs, Ignition Wires, Oil Filter, Oil, Coolant, Fuel Filter, EGR Valve PCV Valve, Knock Sensor, Oil Cooler Assy, Thermostat, Timing Belt, Mass Air Flow Sensor, oxygen sensor (before and after), Catalytic Converter, Muffler, and Fuel Injectors. Vacuums ok.

5 Answers

1,235

Most of the things you replaced would have little effect on the problem. You need a new mechanic.

1 of 1 people found this helpful.
3,125

You have not mentions the coolant temp sensor which would peak my interest as it is a temp variation problem.

175

That sounds pretty normal for a 3.0 to me. They're supposed to idle high until they warm up.

2 of 2 people found this helpful.
3,125

Kyle I think what they meant is that it idles from 400-700 in a surging up and down when it warms up, but yes, your correct, it is suppose to idle faster the colder it is

90

idle control valve or fast idle valve

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