• 1000's Of Fords For Sale
      1000's Of Fords For Sale
    • Savings Up to 15% Off For Members
      Savings Up to 15% Off For Members
    • Share Your Car Experience
      Share Your Car Experience
    • Get Your Club gear
      Get Your Club gear
    • Huge Range of Ford Parts
      Huge Range of Ford Parts
    • Join Premium & Save
      Join Premium & Save


Damian_B

Catalytic Converter Problems

6 posts in this topic

Hi,

Four years ago I had to buy a new catalytic converter for my Focus. I've just been told I need yet another one. What could be wrong with it? It can't be normal to have to replace the catalytic converter every four years, can it? The car is only 8 years old and has done 90k.

After getting the new one fitted four years ago I continued to have problems with the engine warning light being on. The garage said they didn't know what was wrong with it and basically shrugged it off. This was a garage approved by the Office for Fair Trading, not a totally dodgy one.

I'd be grateful for any advice. I don't want to replace another catalytic converter if it will just go again in a couple of years. Is there likely to be an underlying problem, or could the garage have botched the installation of the last one?

Thanks.

DB

Share this post


Link to post
Share on other sites
 

Could be a few things , un- burnt fuel can cause early fails , or bad mixture of fuel causing it to clog easily.

Also continued use of additives can cause them to fail.

Incorrect fuel/air mixture, incorrect timing, or misfiring plugs are the first things to check

Share this post


Link to post
Share on other sites

did you have the fault codes read? this is what the engine warning light is indicating..

Share this post


Link to post
Share on other sites

Moving to the Focus section, its probably better served there!

Share this post


Link to post
Share on other sites

should never fit a cat till youve found and cured the problem that caused it to go in the first place...if that hasnt been done then guarantee it will keep blowing.

if engine light is/has flashed then the reason it flashed will be instantly stored in the ecu....majority of cars it will stay there till its been read and cleared with a reader..

if it was me, thats first point of call...get it read followed up with an emmission test and readout...

one tip....always remember any fault code is a clue to the fault, not a definite reason for whats wrong.

for eg...code tells you oxygen sensor is not switching...doesnt mean sensor is faulty, it could be a wiring fault, could be injection fault, ecu fault and so it goes on...

finally, be aware that cheap cats are known for failing prematurely....a definite item that fits in the you get what you pay for catagory.

Share this post


Link to post
Share on other sites

Is the car a petrol or a diesel? what engine/ capacity is it?

(i assume its a petrol engine) if its a petrol the engine has to operate at the correct air/ fuel ratio, otherwise it can contaminate or burn out the CAT, without fixing this 1st it will continue to need CATs (as wase has said)

Thats a good piont about sensors etc, the amount of times iv'e read on forums, that someone hase replaced a sensor (sometimes at great cost) because its showing a fault code, to find the new one shows the same code

Also, other things can contaminate CATs, like a worn engine

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now