2001 TJ 2.5
I've gone through the boards and tried a few things. Cleaned the IAC and throttle body. Tested it with a new TPM and IAC plunger. Reset the PCM. Replaced all my air intake hoses (some were missing, rerouted, plugged when I bought it) and have looked for leaks but have not done a smoke test.
The problem is random so I can't repeat it at will. When I am driving if I release the gas the RPMs hold where they are for a second then slowly starts to drop. Seems normal. However, when I depress the clutch that seems to be when the RPMs will shoot up 500-1000. Then they will drop while I coast with the clutch in. Then without changing anything the RPMs will shoot back up and then down. Kinda like a pulse. Once I get to a stop that's when everything seems to go back to normal but not all the time. Sometimes the RPMs will shoot back up while stopped both with the clutch in and out while in neutral. Sometimes I slow down and stop and everything is normal.
The worse part is sometimes while stopped and I just released or release the clutch and give the car some gas, that will cause the RPMs to shoot up to 2000... sometimes even 3000 and hover there for 3-4 seconds before coming back down. This is more rare than the regular RPM isue and sometimes during those times I have the small evap leak and large evap leak codes thrown. I replaced the gas cap but this still happens. Clear the codes and CEL stays off until the next spike in RPM
It's weird because sometimes the Jeep drives fine without any RPM issues. Other times I feel like the guy next to me thinks I want to race.
I'm in the process of replacing the cold air intake setup the PI put in with a stock air handler. Kiinda not sure what to do next but before I take it to a mechanic figured I would give this forum a shot. Below (I hope) is a video of the RPM.
I've gone through the boards and tried a few things. Cleaned the IAC and throttle body. Tested it with a new TPM and IAC plunger. Reset the PCM. Replaced all my air intake hoses (some were missing, rerouted, plugged when I bought it) and have looked for leaks but have not done a smoke test.
The problem is random so I can't repeat it at will. When I am driving if I release the gas the RPMs hold where they are for a second then slowly starts to drop. Seems normal. However, when I depress the clutch that seems to be when the RPMs will shoot up 500-1000. Then they will drop while I coast with the clutch in. Then without changing anything the RPMs will shoot back up and then down. Kinda like a pulse. Once I get to a stop that's when everything seems to go back to normal but not all the time. Sometimes the RPMs will shoot back up while stopped both with the clutch in and out while in neutral. Sometimes I slow down and stop and everything is normal.
The worse part is sometimes while stopped and I just released or release the clutch and give the car some gas, that will cause the RPMs to shoot up to 2000... sometimes even 3000 and hover there for 3-4 seconds before coming back down. This is more rare than the regular RPM isue and sometimes during those times I have the small evap leak and large evap leak codes thrown. I replaced the gas cap but this still happens. Clear the codes and CEL stays off until the next spike in RPM
It's weird because sometimes the Jeep drives fine without any RPM issues. Other times I feel like the guy next to me thinks I want to race.
I'm in the process of replacing the cold air intake setup the PI put in with a stock air handler. Kiinda not sure what to do next but before I take it to a mechanic figured I would give this forum a shot. Below (I hope) is a video of the RPM.
