iamchad

Hey guy I own a 02 f-150 ext cab 4x4 5.4L and it's skipping and jerking baddddd no coil codes replaced egr cleaned throttle body used seafoam

On behalf the battery is jimmy rigged could be the cause for the jerk/ skip? Mainly on acceleration or up hills by does do it around constant speed and main gear changing 30-40 55 and 60-75 rpms shoot to zero then back up causing the jerk idk what would cause this mainly coils I here ppl say but I got 0 codes for that

biglee88

If it goes all the way to zero I'd figure loosing power but this is weird it does sound like a coil to

iamchad

Here's an old code I wrote down I had before p0320

iamchad

An old code I had when I accidently cleared it bit I wrote it down p0329

iamchad

Bump

bobkyle2

Yes, Fix all connections to the battery.

It could also be a Crankshaft sensor and/or the wires running to and from.

There is also some wires that runs to the alt that can give you problems. Its connected in close to the battery and a AC line, I can't remember exactly off the top of my head, But you need to check those wires for chaffing. You should be able to see the back spot in the wire.

iamchad

On will check those thanks I'll get back to ya

Warhammer

The reason people are telling you it's probably the coils is because that is what matches the problem you are describing. It is very common for coils to start going bad without throwing and check engine code. You can buy a full set of plugs and coils off of eBay for around $150. You'll probably spend more than that messing around with every other "possibility" while trying not to do what several (on both of your threads for this topic) have already suggested. Just do it. Your plugs are probably way overdue for a change anyway, and new coils are never a bad move. Good luck!

deanofay

When my coils started going bad it never threw a code and I had a horrible misfire. Sounds like what my truck was doing minus the rpm dropping to 0. Buy the coils online you can find them for $80 instead of $400 from autozone.

iamchad

Iv had a coil out b4 and it just don't feel like a coils out its different