milotan wrote:what are you going to do to get the oxygen sensor working for the efi computer as the pacemaker
does not have a mounting point?
Well for this I'm going to be drilling a hole and welding a o2 sensor bung to the extractors.
At the moment I'm doing some research on the single wire oxygen sensors for the best point to mount them to and I've found that they require quite a bit of heat to start functioning and sending mixture readings to the ecu. The single wire o2 sensor gets its heat from the exhaust (non heated).
![nerd 8-)](./images/smilies/msn_nerd.gif)
Ok so There are various types of o2 sensors. 1 wire (signal) 2 wire (reference ground and signal wire) 3 wire (B+,reference ground and signal wire) 4 wire ( ground(B-), B+,reference ground and signal wire) and a 5 wire with diagnostic wire being the only addition.
Point A and point B in this picture would seem like 2 of the most logical spots to be mounting the sensor how ever, if mounted at point A the sensor will only be taking a reading from 2 cylinders, and I see this as a potential problem if one of the other cylinders start leaning out for some reason as the ecu wont pick up the problem. (dependent on ecu)
So then that leaves us with point B how ever this is a lot further away there for may take longer for the sensor to start sending readings (or may not function at all?) to the ecu. (The ecu may throw an error code or run in "limp " mode because of this, once again depending on what ecu your running) So in conclusion to the above, point B with a heated o2 sensor seems like the way to go as it will be taking a reading from all 4 cylinders.
A heated o2 sensor heats up in seconds without relying on its position in the exhaust system and starts sending readings to the ecu immediately, and from what I understand they are far more accurate and could possibly improve power and economy at the same time because of this.
If your not too fussed how ever then point A would be the best spot for a single wire o2 sensor.
![thump :thumpsup:](./images/smilies/thumbsup.gif)
My only question is.
Does every o2 sensor work the same way sending readings regardless of whether its a heated sensor or not? ie I/O switch type o2 sensors? narrow band sensors? wide band sensors? either way ill be experimenting on my daily driver with various sensors and motoring things closely
M.B
![thump :thumpsup:](./images/smilies/thumbsup.gif)