I got a 1999 Ford f150 5.4 liter and recently it blew a spark plug I replaced the cylinder head but now it's not running right could my catalytic converters be clogged at a 180,000?

 

gotta love these motors spouting out plugs

 

What is not running right about the engine?

 

Codes? If not, check your coil plugs. If there all good, your spark plugs weren't properly gapped.

 

I never loved questions, and answers like this....

Your truck is no longer running good. Okay sweet. That tells us NOTHING. How is it running poorly? What is happening? Does the weather, time of day, environment seem to affect it at all.

Also, you might be right about improperly gaped plugs. But you the OP needs to do some REAL diagnostics. Don't throw parts at it. Find out what is wrong.... Check fuel pressure, check for spark, check for vacuum leaks, etc. etc....

 

I got it at a shop right now and there's a possibility that I timed it wrong....anyway the shop is saying the number 5 piston is missing so there doing a compression test on that cylinder. ...I'm just wondering if the cats could be clogged and maybe that's why it blew the plug......The truck idles fine and has no problem getting up to 65 it's just when I gas it .....it gets real loud and doesn't have ***** going 65 plus

 

Thats because your firing on only 7 cylinders. XD

 

I never said to throw any parts at it. I simply told him to check the ingition parts.

 

If it runs good up to 65 I dont think its your timing. And no plugged cat will not cause a blown spark plug.

 

To me it is more generalized, and IDK not trying to give you a hard time, I just feel more diagnostic's need to be done.