Fuel Injector Problem

["Chris C" <petleech@xxxx>]

I am new to the list and I am currently restoring an '83 DMC vin 
016727. When I got th car it wasn't running at all and I wnt through 
th whole fuel system and freed the plunger thats usually problematic 
ith the fuel air mixture. After the plunger was freed the car ran 
smoothly and beautifully, but after I had the car inspected, the 
engine would hunt horribly and after 1 point wouldn't idle at all. I 
ended up richening the air to fuel mixture screw located behind the 
air filter just to get the car to run. After that the car got about 
10 miles to the gallon and now gets about 17 on the highway. I have 
replaced the oxygen sensor, tested the pressures, set the timing, and 
flushed the injectors with cleaning. The problem could be a vacuum 
leak but I am reluctant to buy a vacuum testor because of the price 
and when the engine was pulled I could see no obvious leak. Someone 
had suggested I change the injectors? Is this the most likely problem?