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Throttle Actuator Control (TAC) System Description
You have APP- accelerator pedal position sensors or one of the Throttle position sensors is going bad ! In the (TAC) system ! This is drive by wire or electronic throttle control . If you take it to the dealer or a ASE certified repair shop they can check the DTC'S - diagnostic trouble codes ! This is nothing for a DIYer to mess with ! This system can set 7 different DTC'S
Reduced Engine Power Mode
When the PCM detects a condition with the TAC system, the PCM may enter a reduced engine power mode. Reduced engine power may cause one or more of the following conditions:
Acceleration limiting--The control module will continue to use the accelerator pedal for throttle control; however, the vehicle acceleration is limited.
Limited throttle mode--The control module will continue to use the accelerator pedal for throttle control; however, the maximum throttle opening is limited.
Throttle default mode--The control module will turn off the throttle actuator motor and the throttle will return to the spring loaded default position.
Forced idle mode--The control module will perform the following actions:
Limit engine speed to idle by positioning throttle position, or by controlling fuel and spark if throttle is turned off.
Ignore accelerator pedal input.
Engine shutdown mode--The control module will disable fuel and de-energize the throttle actuator.
Sound's as though a previous owner installed a speed governor so that the engine would not exceed the nationwide 55-65 mph speed limit average. This most likely was a company owned vehicle or owned by someone concerned about speeding ticket's or excessive speed by a teenage driver. It can be uninstalled by an experienced mechanic. Unless this poses a problem while driving on an interstate, you may wish to leave it as is.
LEILA A CLOGGED CATALYST CONVERTER MEANS POOR ACCELERATION OR NO ACCELERATION AT SOME SITUATIONS PLEASE CHECK THE THROTLE VALVE FOR DIRT FIRST.YOU COULD HELP ME MORE BY SENDING ME THE VIN SO THAT I CAN IDENTIFY THE ENGINE CODE.LET ME KNOW
There is no fixed carburetor setting on these engines, just two screws to adjust low-end and high-end operation. Special tool may be required, there are about a half-dozen screw head standards. Check eBay for tool. Get the engine to run and idle fast (idle adjust) so it doesn't stall, adjust low-end screw so that engine doesn't hesitate or sputter when accelerated. Adjust high-end screw to run fast and smooth on full throtle. Readjust idle to normal.
Could be a bad temp sensor. The bog is a rev limiter to keep engine from running full throtle when hot or when there is another problem. You can bypass the temp sensor and see if that takes care of problem. The parts about 100.00. I disconnected mine a now run a temp gauge which I mounted on the right side just above oil gauge.
This is an idling problem. Whenever the shift selector is in N or P the engine is running free of the torque converter load, so the rpms in these two positions are higher than in 1,2 or 3. If the engine is runing and you are driving say in position 1 and come to a stop and the engine stalls, you need to clean the Idle Air Control valve. This valve provides the engine with additional air anytime the throtle valve is clossed, such as when lifting your foot off the accelerator pedal, while driving. If the valve is clogged (with dirt, fumes, sand, dust), its moving parts do not move freely (or move erratically) under the comand of the Power Train Control Module and so with no additional air feeding the engine when needed, it stalls. The IAC valve is located on the side of the throat of the throtle body, under the air intake hose. Unscrew the air intake hose nut that is on top of the throtle body. Remove the air intake hose so that you can habe better acces to the IAC valve. Next, locate the Idle air control valve and unplug its connector. Unscrew all star screws of the valve and take it out. Apply liquid contact cleaner inside the IAC with a spray. While doing that move with your fingers the movable pieces the valve has, spray it enough liquid to get all dirt out. When the liquid comes out clean, let it drip until dry. The liquid dries fast. When dry, reassemble all. You are all done. To prevent this from happening again, make sure the Air intake hose is well nested on the throtle body. It has black rubber ring around that prevents dust from coming in and clogging the IAC, make sure the ring is there. IAC valves are buit rugged, once clean they are capable of providing many years of trouble free service. Just mind to have only filtered air coming into the throtle body, not dust or smoke. Put the hose well on its place.
My gas petal used to stick on the jeep so i spray up in there on the petal to stop it from sticking ore the brake light woud stay on becuse petal got stuck try some WD40 just dont sray on your petal ok might work