If I delete the cats on this truck how do I fool the O2 sensor?

 

Something like this:

Mustang Plug-in MIL Eliminators at AmericanMuscle.com - Free Shipping!

More trouble than it's worth unless your cats are hopelessly plugged and you never have to worry about inspections.

 

Yeah both cats are plugged to the point it blew one of my spark plugs out of the head and I had to deal with that. Also we did away with the inspections back in the late 90's.

 

Please it makes my brain hurt.

You did not blow a spark plug because of clogged cats. If your cats were that clogged, the engine wouldn't even run.

You blew a spark plug because the threads are damaged and the spark plug couldn't hold on any longer. There are numerous causes for this, overtightening, too loose, etc.

In all likelihood, this caused misfires which in turn clogged the cats (the cats didn't clog themselves).

As mentioned above, running an eliminator is a lot more trouble than its worth.

Firstly, they often don't work. Secondly, you cam profile is set up for cats, so if you don't have cats, the engine over scavenges, resulting in a decrease in fuel economy because the intake mixture gets pulled into the exhaust.

That would be a hard comparison for you, since the conditions that likely caused the cats to plug is probably causing poor fuel economy.

 

The plug that came out looked as though it only had about 1/3 of the threads n the head. I assume that the last meathead probably cross threaded the plug and when it seized they called it good and thought it was in properly or didn't care. We used a heli coil spark plug repair kit for the fix. The engine has over 137k on it and I couldn't justify a new rebuilt head. I looked a little for a pull off head at the JY, but didn't run across one.

Now for some reason the cylinder that the spark plug repaired burned the entire bottom of the spark plug off. So I used a shorter bushing from the kit in order to see if that was the problem. I cant imagine that being it because it was the same length as the threads on the spark plug.

Any ideas?

 

I've never heard of such a thing, please elaborate.

 

This post is actually about my truck, and I'm not sure the fuel mileage could get any worse. I usually get around 12 empty, and about 8 pulling my trailer. When I pulled the cat off, four golf ball size chunks of the mesh or whatever you want to call it came out and you could only see through about 25% of the cat. It was pretty clogged. Unfortunately we are still having head and spark plug issues. I plan on swapping the head this weekend and will let you guys know whats going on after that. I appreciate all of the input.