F-150 coil issue-2000

[Jmnhunter]

i have the dreaded COP issue on my 5.4 2000; its intermittent(when it does miss, its a when i accelerate to 50mph and after its warm, it goes away) has not thrown a code. I was curious if anyone has got a scanner to pick up on the bad coil even though its not throwing a check engine light?-i thought i heard somewhere some places have better scanners to pick up on this? I dont need to have it fixed right away, its more annoying then anything since it doesnt happen everytime, maybe something i get done sometime this summer.

yes the plugs have been changed about 20k miles ago and I dont want to check each coil as it looks like a PITA to get in there to check each one

[1968]

Did you replace the boots when the plugs were done? At least one out of eight seldom last the life of 2 plug sets.

Also make sure your intake manifold isn't leaking coolant. The last four 5.4 "tune ups" for me were due to coolant down the plug holes.

[Jmnhunter]

no the boots were not replaced during the spark plug change and the intake manifold is clean

[JOHNBIGDOG]

A ford dealer can find the cylinder that is misfiring and have it fixed in a half hour.

As a ford tech our scan tool has a "power balance" mode that shows, in a line graph form, the relative power balance of all the cylinders. Makes quick diagnosis of this problem. Also it may be cheaper for you to purchase the coil ahead of time and give it to the service writer then to have the shop sell you the coil.

Also I will bet if you put your truck in reverse step on the brake pedal AND the gas pedal, the misfire will get very bad.

[Jmnhunter]

the dealer would allow me to bring an after market part or a motorcraft part i found elsewhere for them to fix?

[Jaspernuts]

You can buy all 8 off the bay for seventy bucks. Thats cheaper than the diag you will pay and thats the price of one coil at the dealer. Then they are all good for another 100k. Easy to install yourself.

[Jmnhunter]

"Easy to install yourself" HA! i've done a early 90's chevy and that was easy, but this is stuffed with fuel/coolant lines, cant even fit a hand back by the firewall without taking the top half of the motor off!

i'll probably have them run a scan and bring it to a local shop for them to play with; thanks all

[Jeremy airjer W]

"Easy to install yourself" HA! i've done a early 90's chevy and that was easy, but this is stuffed with fuel/coolant lines, cant even fit a hand back by the firewall without taking the top half of the motor off!

i'll probably have them run a scan and bring it to a local shop for them to play with; thanks all

A 6 and 12" 1/4 drive extension, A quarter inch ratchet, and a 7mm short chrome swivel from either mac or snapon (craftsmen are to long to get the one under the fuel pressure regulator)is all that is needed to get the 8 bolts that hold the 8 coils in place. There is not a whole lot that needs to be removed besides the air snorkel. Everything pretty much stays where it is and you can easily work around it.

The aftermarket scan tools also will have a cylinder contribution test (snap on lists it under functional tests). Find the cylinder that is showing negative numbers and you found the culprit!

[JOHNBIGDOG]

SK (the tool brand) will work too, about 15 bucks last time I had to replace mine.

[Jeremy airjer W]

SK (the tool brand) will work too, about 15 bucks last time I had to replace mine.

Good to know. I believe the Cornwell and the Matco one will not work either. At one time we checked all the major tool guys swivels to see what ones worked and what ones did not. This was years ago so the designs may have changed. If I remember correctly the difference between the ones that worked and the ones that did not was the depth of the socket part of the swivel. The shallower the socket end the better the fit in the tighter I spaces.