GMC Repair: 94 eldorado 4.6 engine miss, spark plug wire, auto part store

Question
this  northstar powered caddy has an engine miss right after startup goes away less than a minute.  Compression and ignition ok, fuel press was low filter bad. replaced it. No help, im thinking head gasket or f.i. Even though fuel press doesn drop fast

Answer

logo buy a spark tester at any auto part store. it is inexpensive. Test every spark plug wire. You will need to replace the set. Do not change individual wires. This goes with any part that is in a set or pair. check the plugs as well. regap if necessary. email me if this does not work. Also consider scanning. Northstars can be very difficult.