I have added a can of Seafoam, i have replced fuel filter
Try this.
Engine stalls cold or RPM
fluctuates at idle up and down or dies near idle. This problem
is commonly caused by a dirty automatic idle speed control valve and
throttle valve but always run a OBD2 fault code as well as the
cleaning procedure. Buy a can of throttle valve cleaner (do not use
carburetor spray cleaner!) from NAPA or Carquest (made by CRC
chemicals) and spray it into the air intake while the engine is
running, use up about 1/2 the can, engine will try to stall hold the
speed up, shut it down and let it soak for 30 minutes, restart and
blow out the remaining fluid, shut it down and disconnect the
negative battery cable for 5 Min's to reset the base idle control
SOURCE: Idle surges after warm up and when brake pedal is pressed
1990 22re same problem surge when pedal was depressed thought it was booster or check valve still didnt fix it i even put a brand new booster on it just to make sure still no fix it finnally went away on its own for about a month now it does it just sitting at an idle with out the brake pedal depressed traced all vaccum lines no problem there and still have no clue
SOURCE: 1990 Toyota Pickup
carb or Fuel injected try cleaning either one of these bad distributor cap or rotor or distributor good luck
SOURCE: 1991 toyota
Turn the idle screw clockwise on top of throttle body. This will lower the idle and get rid of your up & down idle when you depress the brake.
SOURCE: unstable idle on my 1991 Toyota Cressida. Stalls
EGR WILL NOT HELP.. IDLE AIR CONTROL. POSSIBLE
SOURCE: The 1984 Toyota 4x4 pickup truck will not idle
On a 1984 Toyota I would look for a screw to set the low speed idle on the carburetor, if so equipped. Turn the screw until the RPMs are reasonable.
If you can maintain a smooth idle by adjusting the screw your home free.
If not, then there could be other problems with your vehicle's emission, ignition, comprression, or fuel.
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