Aug 14, 2026

Day 6 — PCV Fix, Idle Dialed In, First Road Tests

7 logs analyzed · 96 minutes of logged data · 2 stall/restart events detected

Everything converges Installing a missing PCV valve eliminated the white exhaust smoke that had been misread earlier as a rich condition (it was oil, not fuel). The idle table reached its best stability yet (±19 RPM), and the car left the driveway for the first time. Drive 2's post-drive stall was traced to a ~0.4% shift in closed-throttle TPS — a real, if intermittent, mechanical finding — while drive 3 completed cleanly with the same TPS band recovering to normal.
7
Logs this day
96m
Logged duration
888
Avg idle RPM (session-wide)
2
Stall/restart events

06Log-by-Log Breakdown

Session-wide statistics computed across each full log. These pool every idle-qualifying sample in the file, so they run higher than the narrow steady-state windows cited in the final project report — that's expected; this view shows total session variability, not just the best segment.

Coldstart-3.mlgLOW CRANK VOLTAGE 0.0V

PCV valve installed — white smoke resolved. Idle stability reached ±19 RPM, the first genuinely tight result.

742.4s
Duration
74202
Records
95.4–213.0°F
CLT range
1479.0
RPM max
985.0
Idle mean
152.4
Idle σ
0.0V
VBatt (crank min)
34.0%
Fan on %
1
Stall events*
w-start-2.mlgLOW CRANK VOLTAGE 5.33V

Full 453s warmup. Fan-on/off discontinuity in idle RPM identified and addressed.

453.6s
Duration
45345
Records
170.9–212.5°F
CLT range
3933.0
RPM max
947.0
Idle mean
163.6
Idle σ
5.33V
VBatt (crank min)
61.0%
Fan on %
1
Stall events*
w-start-4.mlgLOW CRANK VOLTAGE 0.0V

Truncated at 47s — TunerStudio went offline mid-session (USB link drop).

47.3s
Duration
4170
Records
168.6–172.5°F
CLT range
461.0
RPM max
403.0
Idle mean
43.4
Idle σ
0.0V
VBatt (crank min)
0.0%
Fan on %
0
Stall events*
C-start-4.mlgLOW CRANK VOLTAGE 9.2V

Heater-on-max idle surge documented and explained (open-loop can't see the load). Cooling holding noticeably better.

1754.9s
Duration
175413
Records
116.1–209.1°F
CLT range
7620.0
RPM max
899.0
Idle mean
131.6
Idle σ
9.2V
VBatt (crank min)
72.0%
Fan on %
0
Stall events*
test-drive-1.mlg

First road test. Clean, no faults, coolant held under load.

519.4s
Duration
51919
Records
134.0–208.0°F
CLT range
3530.0
RPM max
1057.0
Idle mean
215.3
Idle σ
13.69V
VBatt (crank min)
43.0%
Fan on %
0
Stall events*
test-drive-2.mlg

Stalled after the drive — closed-throttle TPS was found to have shifted ~0.4%, dropping idle until it died.

650.0s
Duration
64979
Records
205.6–209.7°F
CLT range
3054.0
RPM max
851.0
Idle mean
220.0
Idle σ
12.54V
VBatt (crank min)
100.0%
Fan on %
0
Stall events*
test-drive-3.mlgLOW CRANK VOLTAGE 0.0V

27-minute drive, no stall. TPS band recovered to normal; idle held ±19-20 RPM in steady segments.

1606.0s
Duration
160536
Records
205.2–212.6°F
CLT range
4246.0
RPM max
1076.0
Idle mean
210.2
Idle σ
0.0V
VBatt (crank min)
100.0%
Fan on %
0
Stall events*
* On stall/restart counting Detected algorithmically as RPM dropping below 300 for a sustained period followed by a subsequent rise — a reasonable proxy for restart events, not a precise fault classifier. Treat as directionally accurate, not exact.
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Day 5