How many catalytic converters are on there?

Here is a guide to help walk you through the cat replacement with instructions in the diagrams below for your car.

https://www.2carpros.com/articles/catalytic-converter-replacement

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.

Differential axel is leaking oil...I recently changed the oil , 70-145 weight.. I found oil on my front left wheel quite a bit ..its also getting on my catalyt converter
My Options: rebuild or replace ? ..and if it's a seal that needs to be replaced?

clean oil off everywhere first to get a better idea of where it is coming from more than likely the cover and an axle seal. repair both .

Thank you Sir!!

Noises problem
2003 Ford Expedition 6 cyl Two Wheel Drive Automatic

My truck has 2. What is the expected life span of the convertor and would it be standard operating procedure to replace both if one is bad?

That depends on the engine and the fuel you've used. If the engine starts burning oil a catalytic converter can fail rapidly. Some fuel additives can also cause a catalytic converter to fail prematurely due to incorrect fuel/air ratio. Typically, cat. converters last the duration of the vehicle's life.

One of them was replaced when I bought the vehicle a couple months ago. Now the other one is making the same noise. Would it stand to reason the if one was bad that both would have been bad?

yes most likely both were bad, but my concern would be why either failed in the first place. a failing converter usually indicates an issue with the fuel/air ratio as i stated before. most commonly one or more of the oxygen sensors failing is the reason for the cat. converter to fail. is the engine light on?

no warning lights are on. seems to be running ok. No excess fuel smell. What else could I be looking for?

Does anyone have tips or recommendations on soaking catalytic converters when off the car, I removed them because car wouldn't start, once off it started right up, I've seen some being soaked in laundry detergent, yay or nay Anyone?

could have slight misfire of engine due to weak spark plugs / wires. also ensure engine oil and coolant are not leaking. may want to test the oxygen sensors as well, even though engine light is not on.

I never heard of anyone that was successful cleaning them. They usually melt down internally when they go bad. I recommend getting a direct fit replacement.

will your converter malfunction in cold weather only and not in worm weather

No, if it is faulty, it will be so all the time.

mark (mhpautos)

only on cold weather my truck idole is low like if it wants to turn off but it wont turn off

check eng. light is on and had it check out in the auto parts and told me it was the o2 sensers had already changed the top two before the cadillac converter

Often the O2 sensor will show up due to other problems, parts sellers just aren't techs, you will have to look into the tune side of things leaky injectors, vacuum leaks, faulty plugs, leads any significant tune issue car cause an O2 sensor to go out of range and set a code.

mark (mhpautos)

my expedition idle is low like it wants to turn off can it be the idle air control valve

how can i check to see if its not working properly