first things first.
the sensors are diff, on calif. and fed car.so you need to tell which it is.
one version has an extra low noise ground.
so you need to find out if car needs a 3 wire or a 4 wire and then buy the correct one using my o2 page.
if if you dont get it correct the o2 will rail and the ECU will go rich and then overheat and crack the new manifold. Glows red hot, that is what kills most MANS.
2nd problem may be OEM o2 lead wires my not fit new long manifold bung location.
so use the universal. 15726
testing-Oxygen sensor
if your car is 4wire do not mix up the 2 grounds on car.
one is for heater
and other is for CELL . (02 sensors cell)
mixing as bad news.
http://www.kick-fix.com/oxy-sensor/bosch-pinout.JPG
my edited comes with page. on Bosch.
__________________
http://www.kick-fix.com/
Post your car spec!, what ARE you driving?
96 Tracker, 5sp, 2Dr,4w,d OE stock.Fed48+No A/C ,No Cruise. +MPG gauge. a new 97 today 2wd 4dr
I do not advocate of shot gunning or guessing or working with out tools/meters/scopes
but I will help you the best I can! I can't see or hear/feel your motor, so consider my answers, in that light.
There are 2 diagnostic paths, one with tools and one without! Please advise which path you wish to take?
