Davidlx9

I have a 97 5.4L Triton, i have a engine miss and i cant figure out what is causing the miss. I have changed plugs, coils, injectors, fuel filter, ect. everything i can think of to fix the problem but have had no success. Ihave even checked as many vacume hoses that i can see and dont see any ones that are cracked or broken. Also the engine light is not on, so they cant diagnose the problem at the shop ect. Any suggestions will help, because im at wits end over the matter.