So if your catalytic convertor or O2 sensor fails (or is starting to fail) you should get an SES light, correct?? If not a light, would they throw a pending code?

Mark

 

One of my O2 sensors has been going out over the last couple days. It was only throwing soft codes until tonight when the SES came on and the motor would hardly idle at all. Replacing both of them tomorrow.

 

I wonder how much an O2 sensor costs....

 

mine are bad becuase of the leaky I/C unit I had replaced.
I have new cats and sensors coming.

the one thing I immediately noticed is that my truck is running extremely RICH!
the exhaust is caoted in Carbon and the fuel mileage is about 1/2 what it is normally.

Damn you FORD.... (leaky I/C) cuases more damn problems.,

 

HI!... I had this happen to my cats on my truck. I got NO codes or SES light at all. I knew something was wrong when I lost massive power. Take a look :

https://www.f150online.com/galleries...-793-23378.jpg
https://www.f150online.com/galleries...-793-23375.jpg
https://www.f150online.com/galleries...-793-23376.jpg
https://www.f150online.com/galleries...-793-23377.jpg

 

Yikes!

I plan on having my cats "repaired" prior to any of this happening (i.e. upgrading to single hi-flow cats)

 

my new onesare on the way.

is there an O2 sensor after the cat?

I was thinking of making the ones I have on there now Hollow, just to see how it sounded,
and if I got any codes, I'd put hte new ones on.

It'll be about 3 weeks before Ihve time to get to this though..

how loud do you think it will be with Empty cats and MAC exhaust?

 

Just bought 2 today for $171.20 for the pair. Problem solved...(knock on wood)

 

Aside from the obvious of ripping into them, is there another way of determining if your cats have been demolished.

Mark

 

They will rattle if they are cracked. If they are clogged/melted, you wont know unless to chop the pipe. Hell, you could have bad precats or main cats. Theres 4 total on the pipes.

Mark, shoot me an email and ill see if i cant get you one of the first public avail high flow mid pipes avail from Magnaflow. This will save you quite a bit of coin having a pipe already assembled, instead of hacking into the stock pipe, cutting, adding new cars, etc.

 

I want in on that! I'm about to rip out the whole mid pipe... already have their cat-back (version 1.0, crummy seams...) and heard yours with the hi-flows

email me, I'd like the info...