exhaust gets red hot

[raspyvette]

i have changed the cat, muffler,coolent temp senser,new plugs and wires the truck will idle all day long but as soon as you drive the exhaust heats red hot any help would be great thanks jack

 

[71 cuda man]

What year is your truck & what engine? Well off hand if you changed the cat the only other thing I can think of is check the EGR

 

[raspyvette]

its a 1994 2wd 350ci thanks jack