Engine Issues CJ5 AMC 304
I have a 74 CJ5 that has been I picked up as a project a couple years ago and am just getting some free time to work on. When I bought it, it ran really rough and the carb was junk. After trying to swap the carb with a refurb that leaked I decided to go ahead and get an edelbrock Performer non-egr manifold and a Holley truck avenger 670 cfm carb. As a note I have also replaced the plugs, wires, coil, and rebuilt the top of the distributor (cap, points, rotor). The jeep will fire up fine when cold and idles good until it gets warm. Once it gets warm it starts running rough almost like it is skipping a cylinder here and there. At any time whether it is idling rough or good, if I put it in gear and try and drive it will stall. I have pulled the first plug and checked to make sure the timing is close. I have a timing light but can't use it because I can't get the idle to back down below 1300 RPM and have the idle screw all the way out. I am running manifold vac to the distributor off the bottom of the carb. I have used carb spray to check around the carb base and the plugs in the manifold for vacuum leaks but have found none. I have read it is common to not get a good seal when installing the manifold which could cause a vacuum leake under the manifold. Before I pull the manifold off and try and reinstall I figured I would post this to see if anyone has any other suggestions. Let me know what you guys think and I will check it out and let everyone know.