LE5 won't start with both cam position sensors installed. Either one or both can be removed and it starts, about 3 seconds of cranking but it starts.
Junk yard motor is from a 2006 Solstice, Manual trans. N/A. 80k miles. Matching ECM from the same donor. Installed in a Jeep.
Mods-- Solo header, Cobalt MAF tube with 10" straight section before and after, new Cobalt Cam Sensors due to firewall clearance issues. New timing chain and all the associated parts. New VVT actuators. Custom built wiring harness from AFI.
When it runs I get DTC 0340 and/or 0365 Both of those are cam sensors. depends on which sensor is unplugged.
I realize that the Cobalt sensors are pinned differently so pins B and C are swapped.
When running with the EXH sensor installed I can see the cam pulses and some angular movement. I don't see anything from the INT sensor.
Swapped in the Solstice sensor with the same results. I have a patch cable that I can check voltage on and swap pins.
This is my fourth engine swap. I've been an electrician and instrument tech for 40+ years, now retired. Also been working on cars for 45+ years.
Tune is basically stock other than the VATS/TCS patch, Speedo, Fuel level, Tach and alternator adjustments. Nothing disabled since it needs to pass emissions testing.
On the no starts I can only crank few 10 seconds or else it backfires a lot.
Cobalt cam sensors output different waveforms. Solstice sensors pull up the signal and the Colbalt sensors pull down. My oscilloscope died from neglect. Got a new one on the way. I'll post some pictures.
Put both Solstice sensors in and it fired right up. Exhaust side not bolted it because it hits the firewall and heater hose. Going to have to make a clamp for it to rotate 135 deg. Still have an EXh Sensor DTC. It may have been a bad sensor. Got a new one coming with the correct connectors.
Got this sorted out. Bottom line is that the Solstice and Cobalt/Canyon/Colorado cam sensors are not interchangeable. Physically they are mostly identical. Differences are the size and angle of the connector.
My test rig is a transmission gear with 4 metal poles glued on and running on my drill motor. Initial tests showed a fairly large voltage difference. After about an hour of testing various sensors I noticed that the drill was running CCW which would be the opposite direction of the actual cam rotation. Switched it over to CW and the signal for the Colbalt sensor inverted. It apparently is able to detect rotation direction.
Test4 is the Solstice sensor on channel 1 and the Cobalt sensor on channel 2. Test9 is with both Solstice sensors running with no codes.
What did not help was having a bad sensor and a bad pin in my new connector.
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