cylinder 4 misfire

use a noid light to see if you have power at coil if not there is your issue if you do move on to fuel then compression.

theres no spark on 4 once i figure out the no spark on 4 and still have a misfire then ill move to fuel and compression. and a noid light is used for checking fuel injector pulse right?

correct, also for coil pulse.

I'm having the same exact problem. Did you find out what it was?

Has anyone figured out what it could be...i have no spark on coil 3 on my 02/f150. Already replaced plug and coil for #2 and #3. horrible deiseling noise when in drive or reverse upon load being added. Also when decelerating at around 700-15k rpm. Voltage regulator diode was bad so had to change alternator anyway and thought it may help. Put 93 octane fuel with a can of seafoam to try to clear it. The tapping noise eased off but the extreme shaking has not gotten any better. Any help appreciated as I don't just have money to throw at it!

Mine is having an issue where it has a hard time starting, runs rough when it does run and the check engine light just flases and goes away. Plugs, wires and coil even changed. Tried changing that sensor for the egr at the back of the motor with the one plug and 2 push in studs to the vacuum lines. Plenty of fuel because you can definetly smell it and the pump is new too. People say it could be the crank sensor, idle air valve, throttle body but i have no clue what's going on.

It's a 2001 taurus 3.0 flex fuel