What Happens When You Disconnect Your Throttle Position Sensor?

When you disconnect your throttle position sensor (TPS), your throttle will have no idea how far open it is. In fact, your engine won’t even know if it’s opened or closed. The result? Your engine will think the throttle is always accidentally stuck open. That means when you disconnect the TPS, your car will: Reduce its rev limit to keep you from redlining Check that the throttle is closed before starting (very annoying) Viciously protect itself against what it thinks are hackers that might try to open the throttle at any time Read and reset codes if you’re also disconnected your cam and crank sensors as well Note that this only applies if you leave your TPS unconnected. If you simply unplug it, all of these things happen anyway because the ECU can no longer read the signal from it. So unless you want to be constantly paranoid about leaving a manual transmission car with no neutral for an extended period of time or get yelled at by mechanics every time they scan for codes after some minor repair, just leave it connected.

What Happens When You Disconnect Your Throttle Position Sensor?

1. The ECU will read the TPS as disconnected, but it can’t do anything about it. The ECU will simply ignore the signal from your TPS.
2. The ECU will reduce your rev limit to prevent you from redlining. This is because when you disconnect a sensor, the ECU assumes that something is wrong and that you need more power to make up for it.
3. The ECU will think that the throttle is always stuck closed and keep your engine from starting because it thinks there’s a problem with it.
4. The car won’t start at all if you do not have a TPS connected or any other sensors connected (cam and crank).
5. When you reconnect your TPS, all of these things happen again (except for #4), because the ECU cannot tell if the throttle is open or closed anymore (remember, when you disconnect a sensor, the ECU assumes something is wrong).
6. If you have disconnected your TPS and cam and crank sensors, the ECU will incorrectly read that it is not receiving a signal from the TPS or any of its other sensors. This will cause the ECU to read codes related to these other sensors as faulty.
7. If you disconnect your TPS, crank, and cam sensor, the ECU will think that it is not receiving a signal from the crank sensor. This can cause the ECU to misread codes related to these other sensors as faulty.
8. If you disconnect your throttle position sensor, it cannot tell if your throttle is open or closed anymore, which can cause it to read codes related to this sensor as faulty.
9. If you disconnect any of these sensors (cam/crank/TPS), the car will no longer start at all if you are in first gear or higher (or if you have removed a relay).
10. The car may check whether all of these things are connected before starting: The throttle position sensor (TPS) Camshaft position sensor (CMP) Crankshaft position sensor (CKS) Throttle position sensor (TPS) Engine coolant temperature sensor (ECT) Brake switch (BSW) Ignition switch (ISG) Airbag system

Why Would You Disconnect Your Tps?

• To save money on parts.
• To make the car easier to start in cold weather.
• To make the car easier to start in cold weather without having to warm up the engine a lot before starting it up.
• To make the car easier to start in cold weather without having to warm up the engine a lot before starting it up, you still want it to run smoothly and not stall when you apply throttle.
• You want your intake manifold temperature sensor (IAT) to read higher when you do not have any sensors connected and lower when you do have them connected (for tuning your tune).
• You want your IAT temperature sensor (IAT) reading higher when you do not have any sensors connected and lower when you do have them connected (for tuning your tune).
• You want your IAT temperature sensor (IAT) reading higher when you do not have any sensors connected and lower when you do have them disconnected, but still want it to read correctly for some other reason (for example, for tuning purposes).
• You want your IAT temperature sensor (IAT) reading higher when all of these are disconnected: Camshaft position sensor Crankshaft position sensor Throttle position sensor Engine coolant temperature sensor Airbag system Brake switch Ignition switch Airbag system.

What Happens When You Disconnect Your Cam And Crank Sensors?

• The car will no longer start at all if you are in first gear or higher (or if you have removed a relay).
• The car will not start when you release the throttle, even if your throttle position sensor is connected and reading correctly.
• The car will not start when you apply the brakes, even if your brake switch is connected and reading correctly.
• The car will not start when you press on the gas pedal, even if your throttle position sensor is connected and reading correctly.
• The car may check whether all of these things are connected before starting: Camshaft position sensor Crankshaft position sensor Throttle position sensor Engine coolant temperature sensor Brake switch Ignition switch Airbag system
• If you disconnect any of these sensors (cam/crank/TPS), the car will no longer start at all if you are in first gear or higher (or if you have removed a relay).

Final Words

People will often disconnect their TPS or unplug their cam and crank sensors when they’re doing things like installing cams and intake manifold gaskets. This is because they want the computer to go through its self-check sequence so they can make sure everything is working properly. Sometimes, the computer will throw a code if you change too many things at once without going through its self-check, so it’s a good idea to go through this process to make sure everything is working properly before you put everything back together. Disconnecting your TPS is not something you should do regularly. If your car is running poorly, the first thing you should do is go through a tune check with an engine scan tool. If the tune is bad and can be fixed, you don’t need to disconnect anything. If the tune is bad and can’t be fixed, you do want to go through a tune reset with an engine scan tool.

FAQs:

Q. What is a tune check?

1. A tune check is a process where you go through all the sensors and relays on the car and see what they all do. The computer will read each sensor, relay, fuse, and wire to make sure it is connected properly. Then you go through this process several times to make sure everything is working correctly. This helps prevent a bad tune from causing damage to your car.

Q. What is an engine scan tool?

1. An engine scan tool can be used to go through your car’s self-check and tune reset procedure without having to disconnect anything on your car or remove any wires from its connectors or sensors. It can also be used for troubleshooting any problems with your vehicle that might not have been able to be fixed by disconnecting things from the computer (such as faulty ECU connections).

Q. What happens if I leave my TPS unplugged when I’m installing cams?

1. You should not leave your TPS unplugged when you install cams because doing so will prevent the computer from going through its self-check sequence which may cause damage to your ECU or other important parts of the ECU (if there are no other solutions for this problem). Before you install cams, make sure everything on the car is connected properly and that none of the sensors are disconnected (including your TPS).