Engine Performance problem
1997 Ford F150 V8 Two Wheel Drive Automatic 145000 miles
I have a f-150 5.4L that has been running rough, shuttering on aceleration, and lacking in power. I had it downloaded and said the #4 cylinder was not fireing. I first changed the coil and regained power, but at idol it still missed and RPMs would surge up and down. I then changed the spark plug. After that when I went to start the engine it would only turn over, almost achieve idol RPMs and die. A total run time of aprox. 2-4 sec. If anyone has any tips or advice It surely would be appreciated!