Make sure my base timing is set. I know on a 88 mustang I use to have you would pull a plug to get base timing. I know on early 90's GM cars you had to jump a plug under the dash. I want to put a timing light on my jeep and see where base timing is and adjust it if needed. I'm about 95% sure you can change your base timing on a jeep. All you have to do is move the distributor, I just want to be sure I'm looking at base timing with no advance and I need to know how to eliminate the advance before I mess with it.
2001 Jeep Grand Cherokee Laredo 4.0L NV242LD Transfer Case, 42RE, 119,500 miles