Coolant sensor/idle problem

[Precious88xj]

1988 Jeep xj 4.0 4x4 aw4

So I recently swapped in a high output motor and forgot to install the coolant sensor that mounts to the motor on the renix. I kept my electrical system from the renix. Would that cause me a rough idle I don’t have it connected?
Also I won’t be able to install it to it’s original location can I adapt it to the water outlet where the temp sensor goes located for the H.O

[BenWheelin]

The one in the head is for the gauge and nothing else. Check your ignition system, air filter, EGR valve, etc.

I think Renix has a knock sensor in the block, that would make sense.

[techno1154]

Originally Posted by Precious88xj

1988 Jeep xj 4.0 4x4 aw4

So I recently swapped in a high output motor and forgot to install the coolant sensor that mounts to the motor on the renix. I kept my electrical system from the renix. Would that cause me a rough idle I don’t have it connected?
Also I won’t be able to install it to it’s original location can I adapt it to the water outlet where the temp sensor goes located for the H.O

Are you referring to the sensor in the back of the engine or the one at the front? They both serve different purposes.

[1990JEEPXJ]

The one in the side of the block is important if that is what you’re referring to. If there are no provisions for it on the new motor I don’t see why it wouldn’t work in the thermostat housing like on later models.