Motor swap OBII computer & Oxygen sensor question
Thread Starter
Intermediate
Joined: Nov 2005
Posts: 48
Likes: 0
From: New Orleans La
Motor swap OBII computer & Oxygen sensor question
Hey did a search but turned up nothing...Anyway
I have a '92 & i want to put an in a LT4 motor; it comes with the computer and wiring harnesses...
1) Do i need the OBII computer or can i tweak my OB1?
2) If i do need that computer... will i also need another set of O2 sensors for the computer to work properly? i thought LT4's and even '94- LT1's have 4 sensors while i only have two...and if so how is it an ordeal/ possible to wire something like that to the new computer???
Thanks for any input it is greatly appreciated!!
I have a '92 & i want to put an in a LT4 motor; it comes with the computer and wiring harnesses...
1) Do i need the OBII computer or can i tweak my OB1?
2) If i do need that computer... will i also need another set of O2 sensors for the computer to work properly? i thought LT4's and even '94- LT1's have 4 sensors while i only have two...and if so how is it an ordeal/ possible to wire something like that to the new computer???
Thanks for any input it is greatly appreciated!!
Le Mans Master
Joined: Jan 2003
Posts: 8,596
Likes: 19
From: Portland Oregon
You need to swap out the LT4 knock sensors with your original sensors. Otherwise you old ECM will not like the shunt resistors of the newer engine and will set a code and it will run like do do.
