Engine dies when vehicle is clutched.

[cardana24]

Do you have AC hooked up? If so, see if your idle changes when you turn on the AC. I'm just wondering if your IAC valve is operating properly. If not, then you could see the symptoms you are describing.

AC is not hooked up.


I'll look into getting an adaptor so I can run the VSS.

[IsaacHayes]

VSS not hooked up is your problem. I'm pretty sure of it.

Since the trans is turning the engine when slowing down, then when you push in the clutch it no longer is being turned and the ECM doesn't expect this and the engine speed drops too fast for it to react. I believe I've heard of others having this issue with VSS not connected. If it was connected the ECM would know you are slowing down and see that the RPMs are high and figure out what is going on and anticipate it better.

[bszopi]

Do you have AC hooked up? If so, see if your idle changes when you turn on the AC. I'm just wondering if your IAC valve is operating properly. If not, then you could see the symptoms you are describing.

[cardana24]

I have a 3.4 in my jeep cherokee. When I clutch the vehicle coming up to a stop sign the rpm's dip down low and the engine dies. This only happens when the vehicle is up to operating temp, it works fine when the engine is cold. How can I fix this?

Currently I do not have the Vehicle Speed Sensor hook up, and I do not have a brake switch hooked up (I thought this was only necessary for automatics, and I have a manual trans.) Would either one of those being un hooked cause this problem?

Any ideas?