Parking a vehicle for a few months can really kill them. If you have been running modern alcohol enhanced fuel it it I suspect that is the problem. It attacks the rubber used in older vehicles. It also cleans any dirt or rust in the fuel lines and plugs up filters and injector screens. The only real fix for this is to replace all of the rubber lines flush the rest of the lines (or replace them with stainless) replace the filter and pull the injectors and clean them.
However -
First test, fuel pressure and flow, plugged filter from dirt could cause multiple misfires.
Next test the resistance of each injector and do a simple injector flow test.
https://www.2carpros.com/articles/how-to-test-a-fuel-injector
As you have already checked for spark and compression the fuel system is about the last item.
Test for a vacuum leak using either starting fluid, propane or water.
Good luck.
SPONSORED LINKS
Friday, March 10th, 2017 AT 4:35 PM