While tuning up my 00' F-150, I changed every spark plug except #4 which took a little extra time. Finally got it out and there are no threads on it.

Is this a common probmlem? I know that the cowl design routes water to the rear plug, and causes them to rust, but how do I fix it? I'm thinking about using an exstension, 8-point socket and an easy out, to get the threaded portion of the spark plug out..

Anybody have this problem??

 

Hi and welcome to FTE
Sorry to hear about your problem. There seems to be a problem with the plug threads in the heads on these Modular engines. I would spray liberal amounts of penetrating lube in there and let it soak a bit then try the easyout and see if it will come out without pulling the threads out of the head. Get a tap and clean up the threads in the head before installing a new plug. Use lots of lube on the tan so that most of the shavings will stick to the tap and not fall into the cylinder.

Good luck,
Jimmy

 

We got the thread out with no problems. Put all the plugs in and cranked it back up. It still missed real bad. Disconnected the battery and hooked it back up. Still missed. Drove it to go get the code read and it just cleared up all of a sudden. I have had no problems since then. Hopefully it will stay that way.

Thanks for the reply.

 

My '00 f-150 started missing suddenly while driving down the road. it took about 10 miles for the check engine soon light to come on...had autozone put computer on it and they said the #6 and #8 were misfiring. recommended changing plugs, so i did, and it is still missing just as bad, except the light hasnt come on. any suggestions????

 

Are the most likely thing judging by the posters here.

 

thats what im gathering hugepettyfan, i kept reading after i posted last night. also, i think i was misinformed by the autozone guy, he told me #6 and #8 was on the passenger side, but from what i am gathering from some of the posts it is on the drivers side, can anyone tell me for sure on a '00 ford f150 4.6L. i was concentrating on the cop's on the (what i thought was) #6 and #8 but again i was told these were the passenger side. thanks for help in advance. jim

 

They go like this.

Firewall
4 8
3 7
2 6
1 5
radiator.

Jimmy

 

thanks jimmy, im still having the problem with the truck missing, though. It is only "part time missing", what i mean is sometimes at an idle it will idle smooth as could be, and then sometimes rough. beyond the plugs which i've changed, and believing the cop's are ok, what is the next "process of elimination??? any help???

 

i forgot to mention, now after driving it for about a mile or more, when i come to a stop, i get a terrible smell from beneath the truck that comes into the cab. i describe it as a burnt flesh smell, im not trying to be sadistic, but it truly does. thanks for the help.

 

I would check for a rotted/leaking PCV hose. This is comon and will cause a bad idle and can emit crankcase vapors out of the engine and they do stink.
Jimmy