Yea it's a federal 😂. But imo a single cat for an almost 6 liter V8 that guzzles gas is not acceptable.

 

They flow enough to more than merely adequate to the task.....

 

Ok so I have good and bad news.
Good news is that after replacing the fuse and swapping the asd and horn relay the 20amp in fact did not blow after 35 miles of highway and city driving. Neither did the truck try to stall/lose power

The bad news is that the check engine light did not come on. 😬 No sensor short, no catalyst efficiency below normal, no evap system leak, no nothing.

This has me worried something else is horribly wrong with the truck, unless o2 sensors have a break-in period 🤷

 

How is no check engine light bad? Keep driving it and report back if anything comes up.

 

I have no catalytic converter, if the sensors are working properly I should be getting the "catalyst efficiency below normal" code. Maybe it'll come eventually