p0304 misfire number 4, new plugs and wires, no coolant leaks, chatters quite a bit, new maf, truck runs very well, just a lil rough idle and sounds bad, that being said mash the gas its smooth and powerful, took plug out was soaked, it is firing thru the wire, swapped injectors, nothing helps, however i dont understand how soaked plug would let truck run good out on road, the chatter sounds like a rocker arm to me, cold hot doesnt matter does it all the time, i am lost on this, good fuel mileage, no smoke, just a 0304 code and idles like a miss and chattering

 

chatters and you mash the gas... Smooth... im betting you have a dead cyl. a valve may be bad if its chattering.

 

Sounds like you have low compression on that cylinder, You need to have it checked

 

thats what im thinking as well but how could it run perfectly when driving it?, im talkin smooth powerful runs great, just same code and idles rough

 

At higher RPMs it will build enough compression to ignite the fuel just not enough at low rpms

 

ahh, ok maybe thats the problem then, motor change just my luck, but has to be ive done everything else, unless valve problem maybe take cover off?

 

Thats where i would start, look for maybe a broken valve spring, and make sure your lifters and rockers look ok

 

i dont see enuff room to get cover off, its like jam packed pass side?

 

And if they look ok rotate the engine until the lobs on the cam on that cylinder only are pointing up and check to see if there is any up and down play between the rocker and the cam

 

yeah its tight but it can be done,

 

T sucks perty bad, lol

 

i just bought the truck, wondered if maybe a stuck valve? try to seafoam the brake booster line 1st? was going to yanl cover off today but looks like not enuff room to get it off

 

Cant hurt to seafoam it, be worth a shot

 

any way to get pics of what im looking for? never had 1 of these apart

 

Go to youtube, and put in 1998 crown vic 4.6L valve covers off and you should get a perty good idea what you will be looking at