What adapters do I need for the pressure tester? Looks like I can use a male fitting like on the fuel rail with a Tee and some fuel hose. Just need to find the male fitting

 

Not sure, don't know what brand tester you have. Look on that brands website and see what is available.

 

I have seen an adapter somewhere that would install at the fuel line connector. Cannot find it yet....still looking. It would go here:

 

You can use a simple vacuum gauge to check exhaust restrictions. If you have one , hook up to intake and should have 17 to 19in on gauge. Increase rpm's and watch needle, if it does constant drop, then you have restriction, likely the cat.

 

True, but that doesnt help with fuel pressure.

 

Just giving OP a cheap suggestion, since a lot of opinions from others have been clogged cat.

 

If weather clears before I go to work I will check with Vac gauge. Thanks for the idea, at this point I will try just about anything.

 

unplug the O2 sensors, see if that does anything. at the least, it will tell you if your check engine light is functioning properly. Otherwise, if it helps then you may have some wiring issues if you find that your sensors are testing out as functional and within specifications.

check your timing! I met a dude who did everything and then some until he found bent valves as a result of a timing chain gone bad..

+1 on compression test as well.

 

I have run the truck with both O2 sensor and TPS disconnected and the check engine light came on with proper codes. Thanks for trying. My next move will be Vac gauge when I get some time off.

 

You're supposed to REMOVE the front O2 sensor from the pipe, not unplug it.

By REMOVING it, you're reducing some of the backpressure from the engine, thereby helping it run better.