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Old 12-02-2008, 01:20 AM
duxthe1 duxthe1 is offline
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Join Date: Oct 2004
Posts: 3,278
I think the big thing ECUs validate is whether the O2 signal oscillates and the time from peak to peak. The controller will track the oscillations and mimic them. Part of the "beta testing" will be determining how far from 50% I can deviate the signal before the ECU calls shennanigans. The CIS cars can get away with a pretty poor tune and don't set C/E lights easily. Hopefully I can run it right to the edge of the chart and not "off the charts" so to speak. The neat thing about having the LEDs display the Lambda is that it will let me know when the O2 signal is called out for a fault with a fixed 50%.

I'll keep you guys posted with progress. Right now I'm waiting 5-10 days on a delivery of components, which is torture since I've spent the last several weeks getting the code written and debugged.
Attached Thumbnails
Lambda Controller-o2controller.jpg  
90 300TE 4-M

Turbo 103, T3/T04E 50 trim
T04B cover .60 AR
Stage 3 turbine .63 AR
A2W I/C, 40 LB/HR
MS2E, 60-2 Direct Coil Control
3" Exh, AEM W/B O2
Underdrive Alt. and P/S Pulleys,
Vented Rear Discs, .034 Booster.
3.07 diffs 1st Gear Start

90 300CE 104.980
Milled & ported head, 10.3:1 compression
197 intake cam w/20 advancer
4 ignition advance
PCS TCM2000, built 722.6
600W networked suction fan
Sportline sway bars
V8 rear subframe, Quaife ATB 3.06 diff
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