xjk9bar1

My bad....4.0

I've been a previous owner of a XJ, current owner of a LJ, WK, and now a new proud owner of a '87 MJ for a DD. I'm having one issue getting it ready. The MJ starts and idles fine, but during acceleration it will bog out/miss fire...couldn't get it to rev over 2K without it missing. What I've done: new oil pump/distributor/wires/plugs replaced broken vaccum lines with newused lines from donor '89 XJ new fuel filter new cat/muffler Now the MJ will rev up to 4K with slow/smooth acceleration sitting in the garage. On quick acceleration/test drive, it boggs out again at when trying to accelerate. What is your concensus? Is the timing off a tooth? Should I do the TDC/distributor again? I have tried "search" with little results...maybe I'm not looking or typing the right key words. Thanks, Joe Colorado Springs, CO