Suggest check the EFI trigger points in the tray in the distributor beneath the ignition control. There are four sets of points, each controlling a pair of fuel injectors. Injectors for cyl. pairs 4-8 and 7-2 are each controlled by different points, so this fits your symptoms.

Over time the EFI points are fouled by oil vapors from the driveshaft at the bushing at the base of the distributor. The points will likely work just fine again if you clean them (costly to replace, worth the effort to try cleaning). Each of the points has a plastic cover that must be removed to clean them. I put the covers back after cleaning, but I believe others have simply discarded them.

Other possibilities would be a bad connection between the trigger points and the ECU, bad fuel pressure adjustment (should be 2 bar?), mixture too lean (does the miss disappear at higher speed?), bad/clogged injectors.

good luck!