:-) I HAD READ A FEW THREADS CONCERNING OIL PRESSURE , I KNEW ABOUT OIL PRESSURE ON SOME LARGER ENGINES BECAUSE I HAD A 82 GMC 4X4 PU AND HAD PROBLEMS WITH THE OIL PRESSURE SENDING UNIT. THANKS TO THESE THREADS AND REPLYS IT JOGGED MY MEMORY AND I WAS HOPEFULLY ABLE TO SOLVE MY 87 YJ's PROBLEM...