Oil pumps for the 88 L4 are near impossible to find. Its a common problem with other engines too. I have 93 4.9L Cadillac engine in one of my Fieros and that oil pump is also impossible to find. The pump still works but after an oil change , pressure takes a bit longer than to come up than on my 3800SC. Next time I will try filling the filter with 15W 50 Mobil One, but if I find a new pump I'll buy it.
" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite.
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "