Symptoms:
Info:
Ultra Gauge:
I'm really most concerned about the amount of smoke and weak idle. Those have been the problem since first starting the rebuilt engine. I'm almost positive I caused the high idle problem by confusing the ECU when I removed the TPS.
Cold start and Ultra Gauge video:
97 Discovery - Weak Idle, Smoke, and Ultra Gauge - YouTube
Short drive with lots of Ultra Gauge data (unfortunately I forgot to add O2 bank 2 sensor 2):
97 Discovery - Test Drive - YouTube
At 11:15 it started losing power. I gave it throttle to go and it would barely accelerate and seemed to be misfiring. This is the first time it wouldn't accelerate like that.
Thanks for the consideration
- Lots of white smoke. Dissipates quickly but does NOT smell like coolant to me. Just smells like exhaust/gas, not sweet.
- Smoke disappears after engine warmed up hot, but still idles like crap
- Has two modes of idle, weak and high, which it seems to switch between randomly as I'm driving.
- Weak mode: Idles ok, but not great, in neutral. Struggles or stalls in drive/reverse when stopped.
- High mode: Idles anywhere from 1500 to 2500 rpm. 800-900 in drive when stopped. Only started after I disconnected TPS from the throttle linkage and turned it manually to see what would happen.
- Just started hesitating and barely accelerating in video below.
Info:
- New rings, honed cylinders, main bearings, turned crank, cam, tappets, pushrods, rockers, rocker shafts, timing set, oil pump
- Heads and block surfaced and flat
- No cracks detected by machinist
- New composite HGs
- ARP head studs carefully torqued to 66 lb-ft
- Idled ok, and smoked less before rebuild, even when it was burning coolant from blown HG.
- New Kingsbourne wires, and NKG plugs gapped to 0.035
- All new vacuum, PCV, coolant, oil, and trans oil lines/tubes
- Cleaned MAF
- Oil levels at full
- Redid valley pan gasket with RTV to ensure good seal
- No bubbles in coolant detected when running.
- Plugs were sooty dry black, but now have all turned silvery grey.
- All cylinders have compression around 150-160 psi except #3 at 140 (was 120 a few days ago)
- Adding cap of oil to #3 boosts compression 10 psi.
- Oil samples do not appear to contain coolant
- Engine is still in break in period.
- Fuel pressure is 35 PSI at idle
Ultra Gauge:
- Codes: P1313, P1314, and now P1316
- Alarm: CAT Bank 1 Sensor 1 F: 8789, max 2011
- Timing at high idle is 42, falls when not idling high
- Throttle position: 11.9 (min), 92 (max)
- Coolant F: 188-192 when warmed up
I'm really most concerned about the amount of smoke and weak idle. Those have been the problem since first starting the rebuilt engine. I'm almost positive I caused the high idle problem by confusing the ECU when I removed the TPS.
Cold start and Ultra Gauge video:
97 Discovery - Weak Idle, Smoke, and Ultra Gauge - YouTube
Short drive with lots of Ultra Gauge data (unfortunately I forgot to add O2 bank 2 sensor 2):
97 Discovery - Test Drive - YouTube
At 11:15 it started losing power. I gave it throttle to go and it would barely accelerate and seemed to be misfiring. This is the first time it wouldn't accelerate like that.
Thanks for the consideration
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