clogged cat test idea

Reply Subscribe

Thread Tools

Search this Thread

Nov 5, 2011 | 12:52 PM

cadetspider06

Thread Starter

Freshman User

Joined: May 2004

Posts: 41

Likes: 0

clogged cat test idea

Is it safe to run the 4.9 with just the exhaust manifolds? I am trying to determine if my cats are plugged and thought it would be a good idea to just take the pipes loose from the manifolds. Would it cause any damage? Is there a better way to check for clogged cats?

88 f150 I6 FI 4X4

Nov 5, 2011 | 04:31 PM

cadetspider06

Thread Starter

Freshman User

Joined: May 2004

Posts: 41

Likes: 0

So I pulled the 02 sensor to take restriction off the exhaust, but it still runs like crap.

It will fire off, but then sputter and die.

Any Ideas?

Nov 6, 2011 | 08:36 AM

Harte3

Postmaster

Joined: Dec 2006

Posts: 3,603

Likes: 10

From: Spokane, WA

The sensors will be disconnected with the pipe off which will be a problem in itself. Have you pulled the codes? Also, if your truck has 100,000 miles or more on it the Cats are due/overdue for a change anyway.