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Chris, Shop Foreman
Category: Jeep
Satisfied Customers: 3322
Experience:  Jeep Certified Master Tech
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Cyl 1 missfire, liberty 3.7, 2011, coils plugs wires and

Customer Question

cyl 1 missfire
JA: What is the model/year of your Jeep?
Customer: liberty 3.7
JA: What year is your Liberty?
Customer: 2011
JA: Are you fixing your Liberty yourself? What have you tried so far?
Customer: coils plugs wires and injector swapped out asd relay
JA: How many miles are on the car? Has the car been starting normally?
Customer: 75000 and starting normally
JA: Anything else you want the mechanic to know before I connect you?
Customer: it is intermittent
Submitted: 9 months ago.
Category: Jeep
Expert:  Amedee replied 9 months ago.

Hello and welcome!

My name isCustomerand I can assist you with your question.

Expert:  Amedee replied 9 months ago.

Does the misfire occur all of the time or just intermittantly? Does it happen at idle or under a load?

Have you checked engine vacuum?

Customer: replied 9 months ago.
what is making this jeep missfire intermittently on cyl 1
Customer: replied 9 months ago.
Both at idle and under load but not always did not check vaccum
Expert:  Amedee replied 9 months ago.

Have you checked compression on number 1 cylinder?

Customer: replied 9 months ago.
No only because it runs perfect at times
Expert:  Amedee replied 9 months ago.

Ok, this is because of a burned or sticky valve on number 1 cylinder. YES, it will do this intermittantly and YES, it will show up on a vacuum test using a hand held vacuum gauge. YES, the cylinder head or both heads will need to be removed and sent out to a machine shop for repair. That is your fix.

Expert:  Amedee replied 9 months ago.

Your welcome.

Expert:  Amedee replied 9 months ago.

Hello! It'sCustomerfrom just answer.

I am just checking in to see if you need any further assistance?

Let me know!

Customer: replied 9 months ago.
Expert:  Amedee replied 9 months ago.


Did you have any further questions?

Expert:  Amedee replied 9 months ago.

Or have I answered your question?

Expert:  Amedee replied 9 months ago.

I would like to close this thread out if you dont have any further questions.