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Wont idle,runsrough. Consistent. 1988 Cherokee 40.

Customer Question
wont idle,runsrough JA: Is the rough...
wont idle,runsrough
JA: Is the rough idle intermittent or consistent?
Customer: consistent
JA: What is the model/year of your Jeep?
Customer: 1988 Cherokee 40
JA: Are you fixing your Cherokee yourself? What have you tried so far?
Customer: everything except coolant sensor
JA: Anything else you want the mechanic to know before I connect you?
Customer: cannot find sensor
Submitted: 1 month ago.Category: Jeep
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Answered in 12 minutes by:
10/17/2017
Jeep Mechanic: Amedee, Jeep Technician replied 1 month ago
Amedee
Amedee, Jeep Technician
Category: Jeep
Satisfied Customers: 26,816
Experience: ASE certified Technician advanced level specialist. Wisconsin certified emissions state inspector
Verified

Hello and welcome!

My name isCustomerand I can assist you with your question.

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Jeep Mechanic: Amedee, Jeep Technician replied 1 month ago

This condition can be caused by a few different things.

1. Air/vacuum leak

2. Faulty TPS sensor

3. IAC motor/wiring

4. Base engine idle is out of adjustment.

I would start by checking for air/vacuum leaks first. Fix or replace any as needed.

Then check the TPS signal key on engine off and replace it as needed.

If that checks out good, I would try to set the idle if it has a base idle screw (you will have to double check).

If all checks out and the problem remains, the IAC motor is likely the root cause and will need to be replaced.

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Jeep Mechanic: Amedee, Jeep Technician replied 1 month ago

Hello there!

I am just checking in to see how things are going and to see if you need any further assistance?

If so, please let me know as I will be happy to help.

Best Regards,

Customer/p>

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Amedee
Amedee
Amedee, Jeep Technician
Category: Jeep
Satisfied Customers: 26,816
26,816 Satisfied Customers
Experience: ASE certified Technician advanced level specialist. Wisconsin certified emissions state inspector

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