1. 4.0L timing check - Can I use a normal timing light?

    Can i use just a normal timing light to check and adjust the timing on my 97 cherokee4.0

  2. #2

    Re: 4.0L timing check - Can I use a normal timing light?

    Yes, to check timing, but it's not adjustable. The timing is controlled by the computer.

  3. #3
    So I have to take it to a dealer to have the timing fixed. Or a independent shop with the proper computer

  4. #4
    Join Date
    Feb 2012
    Location
    Cincinnati, Ohio
    Posts
    1,993

    Re: 4.0L timing check - Can I use a normal timing light?

    yes sir.

  5. #5

    Re: 4.0L timing check - Can I use a normal timing light?

    Quote Originally Posted by USAFJEEPR View Post
    So I have to take it to a dealer to have the timing fixed. Or a independent shop with the proper computer
    Neither, the timing is adjusted by the Jeep's computer. When the engine is assembled the timing is either spot on or 180* out.

    What is your engine doing that makes you believe the timing is off?

  6. #6
    Well I've had a lot of issues. I bought it super cheap not running. It takes me forever to start it. I usually can't get it to idle. I did get it to idle one day and a code popped up for the cps. So I replace that. Fuel pressure is good. And I pulled my iac motor. It's nasty. So I'm going to replace that. But if that didn't help I was going to check timing. I have replace plugs wires cap and rotor.

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