95 2.5L running rough

[TimTriumph]

At low RPMs in an easy drive through a neighborhood, occasionally the jeep will hickup. And for the life of me, I can't figure it out. Today, I received a "24" code. Finally, I have something yo work with.

Code 24 = Throttle position sensor signal above or below acceptable voltage.

How can I check this with a multimeter before I start throwing money at it?
I replaced it on my last tune up.

Thanks in advance.

 

[Chris]

At low RPMs in an easy drive through a neighborhood, occasionally the jeep will hickup. And for the life of me, I can't figure it out. Today, I received a "24" code. Finally, I have something yo work with.

Code 24 = Throttle position sensor signal above or below acceptable voltage.

How can I check this with a multimeter before I start throwing money at it?
I replaced it on my last tune up.

Thanks in advance.

Here’s how you can check the TPS with a multimeter:

1. Disconnect the TPS: Make sure you turn off the engine and disconnect the battery for safety. Then, unplug the TPS connector.
2. Set Up Your Multimeter: Set your multimeter to the DC voltage setting.
3. Find the Correct Pins: The TPS usually has three terminals. You’ll want to check the voltage between these terminals:
   - Pin 1 is typically the 5V reference from the ECM.
   - Pin 2 is the signal wire that sends the voltage back to the ECM.
   - Pin 3 is the ground.
4. Power On: Reconnect the battery and turn on the ignition (but don’t start the engine).
5. Check Voltage:
   - Backprobe pin 1 and check for around 5 volts (you should see a steady reading).
   - Now backprobe pin 2 while moving the throttle gently from closed to open. You should see a smooth increase in voltage as you move the throttle. Ideally, it should range from about 0.5V at closed throttle to about 4.5V at wide open throttle.
   - Pin 3 should show continuity to ground.
6. Look for Irregularities: If the voltage is erratic, or if it doesn’t smoothly transition, the TPS may need to be replaced again even if it was recently done.
7. Inspect Wiring: While you're at it, make sure to check the wiring and connectors for any wear or corrosion, as this can also cause issues with the TPS signal.

If the TPS looks good, it might be worth checking other components like the MAP sensor or vacuum leaks, as they can also contribute to rough running at low RPMs.

Hope this helps, and good luck with your troubleshooting!

 

[TimTriumph]

I keep getting "0" volts. No matter what I do.
I fallow the instructions. Even Jeep Solid online has a video that I follow.
I'm thinking it is a bad fuse. Do you know which fuse goes to the TPS?
I have some corrosion and broken contacts in my fuse box and some fuses I have to make contact with a small piece of aluminum foil on one of the blades to make contact. So the fuse could be good but just not making contact. (I have a new one but haven't had the time to pull everything out and replace the harness yet)
Does anyone know which fuse connected to the TPS? I can't find that info.
Thank you.