My 89 SC 5spd. Wont hold an Idle. I put new plugs N wires on. But it sat for 4 yrs. after I put new water pump on. She only runs when I keep hitting the gas pedal on N off. Stop doing that, she shuts off. I drained the gas tank. But maybe it`s the gas left in the Injectors. So, I put Injector cleaner in. Any Help here??. The plug N wires were put in after it sat.