Broncomanjoe

my 97 5.4 is idling rough especially when in gear after it warm i've changed the coil packs and plugs and still rough. its not throwing any codes so i'm thinking about changing the fuel injectors. I don't wanna keep throwing money at it if its not gonna fix the problem it has 140000 on it any ideas?

ONELOWF

Try a check of all of the vac lines, particularly around the back of the throttle body. You can use starter fluid or carb cleaner (be careful) to spray the hose ends and fittings, etc. If the idle jumps up when you are spraying, you have found a vac leak. I actually use propane myself.