O2 sensor

[Tim Rogers]

brian cembor wrote:

>>with my emission problems.. i was wondering.. i have a newer engine in the
car but all the exhaust/intake stuff is from the old car. that being said..
when the old engine let go, could it have fouled the 02 sensor? thusly
giving false readings, contributing to my emissions failure and causing the
21-23mpg i am getting right now?<<

That is a pretty good possibility.
Oil tends to mess up an O2 sensor if it gets on the outside of the sensor, I
would assume the same for the section inside the exhaust pipe.
When your engine blew, did you break any pistons, or did you just seize it?

Tim Rogers
-93 NX T-top -needs motor work
-91 NX - Racecar-to-be
-75 Silverado - Rusty Beast
-01 Astro - Work Van, Tow Beast