Jump to content
speeddemon40

96 cobra killing catalytic converters

Recommended Posts

Anyone else have issues with their 96-98 cobra killing cats? Bought the car several months ago. Came with an off road pipe and mil eliminators, but the check engine light was on. Ended up putting a upr xpipe with hi flow cats on. After a few weeks, a cat started rattling. UPR was cool about it and sent me a new cat and credited me money to have it put on. Couple of days later, the other one went. Same deal except this time I had to pay for it to be cut off and welded back. Now a month later the rattle is back.

I drive this car on nice days so it gets very few miles. Maybe 150 to 200 miles per month.

Runs great, but at a loss for this issue. UPR just crappy or something else wrong?

BTW, car just turned 70k miles.

Share this post


Link to post
Share on other sites

its possible you aren't getting them up to temp to actually burn off.  is the car tuned?  you might be pushing too much fuel at it that the cats can't eat up

Share this post


Link to post
Share on other sites

take it out for a decent trip and give it the business a little bit.  get that exhaust nice and hot and see what it does.

Share this post


Link to post
Share on other sites
43 minutes ago, Prokiller said:

take it out for a decent trip and give it the business a little bit.  get that exhaust nice and hot and see what it does.

 

Are you saying to get the car hot to see if it goes away?

 

It seems like every time it's started rattling was after a longer drive. Then the next time I drive it, it is worse.

Share this post


Link to post
Share on other sites

when you say rattling, do you mean like a pinging/ticking type sound after the car is off?

Share this post


Link to post
Share on other sites
4 minutes ago, Prokiller said:

when you say rattling, do you mean like a pinging/ticking type sound after the car is off?

Rattling while driving like a heat shield is loose. The inner part of the cat is actually moving around in the exhaust

Share this post


Link to post
Share on other sites

Never really known of upr to be a wel k own exhaust manufacturer. I’ve seen cheap cats fall apart on work trucks in the past. A company local here had been victim to an overnight robbing of over 75 cats by thief’s. Local shop replaced them with some cheaply made garbage that all ended up being replaced within months, some writhing weeks. 

 

Some were rattling,  some clogged shut instantly almost due to poor internals melting. They found a more reputable shop who replaced all of them with name brand replacements and the. There was no more problems. 

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

  • Recently Browsing   0 members

    No registered users viewing this page.

×