As stated, swapped my 4.3 vortec for a vortec 350. Runs great but a bit rich. O2s are Bosch which have been in the truck for at least 10 years but they were ran off of the stock v6 manifolds before. Upstream sensors are ranging from single digits to 7-8 hundred on the scanner. Thinking I need to switch to ac delcos. Any opinions?
Vortec 350 swap and hooker longtubes running rich
- Thread starter Oldg1997
- Start date
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