Any replies would be appreciated. Thank you.

 

p0430-catalyst efficiency (bank 2)
p0507-idle speed performance higher than excepted

http://www.troublecodes.net/pcodes/p0507/

http://www.troublecodes.net/pcodes/p0430/

 

The 507 code is most likely a code set by the idle issue and not a primary code - clean your throttle body - easy to do. I would also run a bottle of Techron fuel injection cleaner through the tank, put it in the tank, fill tank, run till empty.

The 430 code is most likely a bad cat converter passenger side - IF you can smack the cat converter to hear if you can hear a rattle or if you can hear a rattle from it over bumps or just the engine running - then the converter is broken and may be falling into a position intermittently that blocks the exhaust and causes your stumble/stall.
IF you hear no rattle at all, it MAY just be bad and not causing an issue other than extra pollution - it MAY also be broken and stuck and not rattling.
If you live in a state that smog tests, you will fail with this code and will need to either cheat to get around it or replace the cat converter. AS long as it isn't broken causing a restriction, it really doesn't hurt anything else.
And if you have a 3 cat converter system on the truck the last cat is cleaning the exhaust of most of the pollutants getting past the upper cat.

 

I replaced both right bank sensors. They were completely toasted melted metal. Worst I've ever seen. I also tightened up all vacuum connections. After clearing the check engine light codes and taking the truck for a 15 mile trip, I'm no longer getting the P0507 however, I'm still getting the P0430? Does this mean I need to replace the catalytic converter? Is this a job I can do myself with muffler clamps or am I going to have to take it to an exhaust shop and get it welded on?

 

If you want to fix it "right" yes it will need replaced.
Since the entire Y pipe is usually one piece, you would need to either replace the entire Y pipe/cats or cut out the bad cat and weld/clamp one in.

IF it runs fine and you just want to get rid of the code - as long as the cat isn't melted/broken/rattling the downstream O2 doesn't do much except tell you the cat is or isn't working - in your case it isn't.
There is a way to fool the system, however that cat will not be reducing the air pollution as much as a good one (if at all) SO it is either fool it and live with that or spend up to several hundred $$ and fix it the correct way.

Let me know which way you want to go.

 

I’ve decided to replace the “Y” pipe that has both cats. I looked under the truck today and it appears it bolts to the manifolds at one end and clamps at the other end to the pipe that leads to the muffler. My eyesight is not so good but it doesn’t look like it is welded anywhere. Does anyone know if I am correct that no welding is required and that I can simply unbolt the whole thing to swap it out?

 

As far as I know, it is not welded anywhere.

 

so after taking off the clamp and bolts all it takes is a little elbow grease and bloody knuckles and it should slip right off?

 

In theory yes There is probably a tab so it won't spin, hopefully not a spot weld (usually isn't but you never know).

Might be easier to just unbolt it and sawzall it into a few pieces so you aren't working with that big piece that doesn't want to move anywhere. Should only need 2 cuts, one on the drivers side of the Y to separate the two sides and one a few inches from the end where it goes into the pipe going back to the back.

Torches help too.

I haven't had any just "slip" off, they are usually a bear to get off unless using heat and on a rack.

 

My 3.7L V6 has 144,000 miles on it. I have yet to replace the cat and I still get the P0430 code. After clearing the codes I haven't seen the P0507 code come back. I don't know if this is related but now every so often when I come to a stop, the engine will die. It will start back up and run really rough for about 1000 feet and then run normally. I replaced the PCV valve and I also replaced the hose/tube that goes from the PCV valve to the intake because it had a hole in it as big around as a pencil. I'm still having the engine stall issue and can't figure it out. I check for codes when this happens and no new codes are present except for the old catalytic P0430 code. I have a hard time believing that a bad cat could cause this because I've been getting the bad cat code for nearly 2 years. I'm really trying to avoid replacing the cat "Y" pipe because it will cost me nearly $1200 for the part. Any help would be gratefully appreciated.

 

Could this be a camshaft position sensor issue?
Also need to know what the curb idle rpm should be.

 

I replaced the camshaft position 3.5 dayys ago and I’ve had no engine stalls yet. I’m hoping this has fixed the problem. Can someone tell me what the curb idle rpm should be?