View Single Post
Old 08-27-2021, 11:11 AM   #7
LugNut1990
 
LugNut1990's Avatar
 
Join Date: Jul 2015
Location: N.E. Kansas
Posts: 835
Vehicle: 1990 Nissan Hardbody
Thanks: 0
Thanked 120 Times in 106 Posts
Default

Definitely not in the cat, as the excess fuel gets burned there. And I'm suspecting that maybe his problem is in one cylinder (if not overall) so that there is excess oxygen and thus combustion continuing in the exhaust ahead of his cat. Even a bad, or using no exhaust manifold gasket, or bad torquing/cracking the manifold, could be contributing.
__________________
Original owner
1990 Nissan Hardbody, Aztec Red
Standard cab, 4x4, KA24E, 5-speed
Intentionally near-stock
Mods: Second OEM horn, stereo/speakers/sub,
mud and snow tires, HD trailer hitch (cat 3+),
liquid bed liner, G1W dashcam
Definitely not for sale!
LugNut1990 is offline   Reply With Quote