So.....
She's back on the road
Had a slight problem at the beginning, was still running pig rich at idle and had a hard time starting when warm. Went ahead and replaced "all the things" and even swapped out the O2 sensor for an Innovate LC-1 I bought back in 2006. Here you can see the new shiny LED and calibration button...
Bump that junk, ran worse than before and didn't do much than cause self-inflicted bald spots as I pulled out my hair and black splewdge from the car.
Here is just the beginning, it got worse, much worse as I tried to program the LC-1 outputs to make the stock ECU happy... like banging your head against a wall and expecting the wall to get out of your way. MadDog even confirmed a similar experience with LH and a wideband conversion, never again Innovate! Fool me once...
Cannabalized the other working 740 wagon of its O2 and installed the stock unit in a second location now everything is well!
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And then I went and got digital...
Got the idea and the base code from a thread posted here:
http://forums.turbobricks.com/showthread.php?p=5673219
Never did like the big ole' analog gauge on the A pillar, so I thought the stealthy aspect of integrating a small display into the instrument panel was a nice touch. But I didn't want everything showing in Bar, so I modified the code to show vacuum in Hg and pressure in PSI.
3D-modelled reproduction of the original...
3D-model modifications to add a 0.91 Inch OLED display plus arduino Nano and pressure sensor
3D-printed unit
Go time!
Plan is to have the bottom left show manifold pressure and the bottom right AFR. Problem is, the 12v to 5v converter I installed to power the Arduino units blew up and took the first unit out in a puff of smoke... No biggie, the things only cost a few dollars, but add another week of waiting till the new toys are up and running.
Until then, vroom vroom!