Question about 1992 Toyota 4Runner
1992 sr5 v6 4runner. Automatic. Has had some electrical issues recently. Just replaced the starter and alternator. It starts and runs just fine, but when you put it in gear, it dies.
That could be an air/fuel problem ,does the engine rev ok when not in gear ? if it does then probably not air/fuel. the autobox speed sensor might be the fault have it checked at a auto trans repair shop
Posted on May 12, 2014
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Posted on Jan 02, 2017
I would suspect a vacuum leak. At idle under high vacuum the air fuel mix is being leaned out until you have misfiring so bad the engine quits. The exhaust smells rich because even a lean mixture, if it doesn't light off, if full of unburned fuel. At road speeds, the vacuum is low so the engine doesn't care if there is a small leak somewhere. It is getting most of its air through the open throttle. Check all your vacuum lines but remember that even if every line is okay, it could still be leaking from an old cracked intake manifold gasket.
Posted on Jan 28, 2009
I just worked on this problem a couple of days ago. If the motor is a 3.0 liter. The idle control valve is located at the bottom of the throttlebody assembly right below the bore for the throttle butterflies..What usually causes this valve to go bad is the mechanical part of the sensor sticks as it becomes sludged or carboned up. Manufacturer claims that the valve cannot be cleaned and should only be replaced....It's a high dollar repair to replace this sensor as your engine coolant flows through this electrical valve. The valve idles the car fast when cold, as the antifreeze gets hot the valve drops the idle down.....I have successfully cleaned several of these valves and cured the dying problems...
First remove the air filter top cover and the tubes that connect to the throttlebody. In the right throttlebody you will see a port right before the butterfly. Under the throttlebody you have a black plastic sensor with a 2 wire terminal. Remove the 2 phillps screws and pull off the electrical part of the valve. you will feel a magnetic pull while removing. Remove slowly and catch the black sealing oring, and there will be a metal washer also.. The shaft that is exposed is the mechanical control of the valve. Rotate the shaft and it should feel sticky if bad..Using a throttlebody spray cleaner spray into the small square port of the right bore, rotate shaft and spray until stickfree.....Reassemble
Posted on Apr 05, 2009
SOURCE: high idle on 89 4runner v6 EFI
Make sure the coolant temp. sensor is connected.
Bad coolant temp. sensor?
Coolant temp. sensor is ground out on the engine block?
The ECU use the resistor value from the coolant temp. senor to determine the block temp.
If the value is out of range.....the ECU will "think" the motor is still cold and let it ran at high idle.
I will use a carburetor cleaner to clean out the throttle plate and intake.
Posted on Dec 03, 2009
Sounds like the wiring plug (key/ignition) The toyota manual pictures the plug and its connections but gives no clue where it's located.
Your radio is a good clue to this glitch. It's losing it's constant (unswitched) elec. power. This means either your car is having a dead elec.system,, or a relay is loose or going bad. Check the security of all your relays under the hood.
Take it to a good shop, but not a Toyota shop.
Finally, try starting in neutral nextime it won't start. Hold the key in start and reach over with your left hand and slide the lever into neutral.. clumbsy but thats the way to do it.
Posted on Jan 31, 2010
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