>>First off, year of truck and engine size would be helpful.<<
Per original post:
"5.2L V8 4x4 '94 Gen 1 with 175k miles on Odo
last smog test 12k miles ago - 2 years prior
Everything passed with good margins
NOx was 250 / 491 ppm max
HC and CO - very low."
>>I will also assume that you had high HC and CO due to 4 cylinders of fuel
just flowing through the engine without the benefit of combustion.........<<
^ this
Once you are firing on all 8 cylinders you should yield better results. As
far as the health of the Cat is concerned, if you haven't driven much with
all of that misfiring you should be in good shape. If the cat is toast, then
you can get an aftermarket 50-state legal cat pretty cheap that will outflow
the stock unit and most are a more efficient catalyst than the stock unit.
Best of luck!
- miggity
This archive was generated by hypermail 2b29 : Tue Dec 01 2009 - 18:23:04 EST