2.8 problem

[lsixtyseven]

My 2.8 won't rev above 4000 rpm under load, but will in neutral, anyone have any ideas? Tried going up a steep hill today almost didn't make it.

[c-l]

Hey Tibs,

Mine did that a few times in the last 20 years. It starts like that and quickly gets worst. Both times, the problem was traced back to a clogging catalytic converter. Easy test - open up your exhaust past the Y pipe, put on a good set of hearing protector and go for a ride. If you can go over 4000 rpm... I'd take a good look at that cat !

[FieroBUZZ]

Or hit the cat from underneath to see if it rattles.  If it's fairly old, it wouldn't hurt to change it.  No more etesting so I guess you could hollow it out if you wanted.

[lsixtyseven]

I'm going take a look at the cat, i hate cats. 

[lsixtyseven]

Does anyone know the size of the exhaust pipe?

[dguy]

1 7/8" inside diameter.

[lsixtyseven]

Well it seems that the cat was the culprit, the car never ran so good and loud.