Check for vacuum leaks for the RPM being high. I don't have much experience with the pedal/throttle stuff, I've just noticed that they never seem to quite report what I'd expect.
Also be aware that the LFX has cat light off - so it'll run super rich and higher RPM for the first 20 seconds or so to heat up the catalytic converters. Idle will lower after 30 seconds or so, faster if the coolant temperature is high. 0x7E8: P0010 - Intake (A) Camshaft Position Actuator Circuit / Open (Bank 1) (Permanent) - doublecheck your wiring here. 0x7E8: P0097 - Intake Air Temperature Sensor 2 Circuit Low (Permanent) - same.. although I think this should be in the MAF(?) 0x7E8: P0627 - Fuel Pump A Control Circuit / Open (Pending, Current, Old) - ignore / disable - since you don't have a fuel pump control module, shouldn't matter. 0x7E8: P062F - Internal Control Module EEPROM Error (Permanent) - ugh.. okay, this one is annoying, possibly made worse by crossing the streams between HPTuners and EFI live. It's basically saying there's a checksum value that's failed. I don't think there's any way to "fix" it - if it was OEM the fix would be to reflash the entire thing with the GM software. 0x7E8: P0807 - Clutch Position Sensor Circuit Low (Permanent) - ignore / disable. |
Just to be clear, nothing from EFI live was ever uploaded. I simply downloaded the ecu data with the efi live autocal, nothing else.
Still waiting on a tune from Overkill... (crickets) So yeah, decided to not wait any longer and just go full bore hp tuners. |
What's the easiest way to post a video on this site?
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<yt> youtube link </yt> if memory serves - replace the <'s with square brackets
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Edit: The numbers on the dash are for the gps. Total brainfart, forgot the obd was connected to hpt.
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Quick question.... does the ecu need to get constant power from the battery even when the car is off? I saw an HPT thread mentioning that you can reset fuel trim values by disconnecting the battery.
So if I am using a battery disconnect and killing power to the ecm when not using the car, am I always resetting the fuel trims? Is this bad? |
If you do not have a constant 12v then it will have to re-learn the fuel trims every time you drive it after it has set for more than 15 mins or so. The impact of that can be minimized by how well your open and closed loop tuning is, but it will make your life soooo much easier if you allow it to maintain 12v and keep the LTFTs.
Hopefully that makes sense... Do you not have any relayed outputs for your ECU, Fuel Pump, O2s, ...? |
Originally Posted by griff
(Post 1547531)
If you do not have a constant 12v then it will have to re-learn the fuel trims every time you drive it after it has set for more than 15 mins or so. The impact of that can be minimized by how well your open and closed loop tuning is, but it will make your life soooo much easier if you allow it to maintain 12v and keep the LTFTs.
Hopefully that makes sense... Do you not have any relayed outputs for your ECU, Fuel Pump, O2s, ...? |
Does anyone know what this plug is? Can't figure out where it goes for the life of me. Wire colors are: 1) black 2) baige with white stripe. The connector is purple and blue.
https://cimg3.ibsrv.net/gimg/www.mia...be8d84b766.jpg |
This chart has been a big help troubleshooting for me. Posting it up in case anyone else needs it.
https://cimg4.ibsrv.net/gimg/www.mia...b299a2f9d3.gif |
Might be the Evap solenoid? See if it tones out to pin 51 on the black ECM connector.
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If the next end down (very last on that leg of harness) is to the secondary O2 sensor, than I believe that connection is to the transmission, towards the back. I don’t know what the sensor is for, but those were the same color wires and connector on my stock harness and I’m almost certain that’s where it connects. (Yours is very different than mine, and hard to trace from picture.)
https://cimg1.ibsrv.net/gimg/www.mia...1a2a85807.jpeg btw...been a little while since I’ve been online, but Congrats on getting the engine started! Sounds awesome! |
Originally Posted by rdb138
(Post 1547583)
If the next end down (very last on that leg of harness) is to the secondary O2 sensor, than I believe that connection is to the transmission, towards the back. I don’t know what the sensor is for, but those were the same color wires and connector on my stock harness and I’m almost certain that’s where it connects. (Yours is very different than mine, and hard to trace from picture.)
btw...been a little while since I’ve been online, but Congrats on getting the engine started! Sounds awesome! Thanks!!! |
VSS sensor for the MV7 is on the passenger side. On the MV5 that might be the trans temperature sensor. VSS sensor and temp sensors are gonna be 3 pin though.
Edit: might be wrong. Pin 9 black connector is Tan/White is the MV5 trans temp sensor. |
Originally Posted by gooflophaze
(Post 1547587)
VSS sensor for the MV7 is on the passenger side. On the MV5 that might be the trans temperature sensor. VSS sensor and temp sensors are gonna be 3 pin though.
Tan and white is definitely it. |
The connector itself looks a lot like a GT150, which is typical for GM temp sensors (if that helps)
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Originally Posted by HarryB
(Post 1547600)
The connector itself looks a lot like a GT150, which is typical for GM temp sensors (if that helps)
Trans temp is not showing up properly (-40F) in my obd2, so I believe that is it. Everything else is connected. |
Is there a way to tell in HP Tuners if my long term trim is being saved or erased when I power down? I believe I have everything wired up correctly, but I'm curious which wire controls the power to the ecu memory. I have an small red 12v acc wire and large red 12v battery wire on my engine harness from keisler. The 12v accessory wire (when off) is not allowing me to connect to the ecu via the obd2. I figured with the main power wire getting 12v I could still connect. So now I am questioning whether or not the ecu is getting power where it needs so it does not turn off and forget everything.
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I'd check your 12v constant with a multimeter while the switch is off to be sure but you will not be able to connect to the ecu, and the obd2 will most likely not have 12v until the ignition is on.
I have not found a way to easily see that the LTFT has been saved to memory. |
Originally Posted by griff
(Post 1547619)
I'd check your 12v constant with a multimeter while the switch is off to be sure but you will not be able to connect to the ecu, and the obd2 will most likely not have 12v until the ignition is on.
I have not found a way to easily see that the LTFT has been saved to memory. Found a loose ground for the engine, so going to try and start it up again and see if that fixes any issues when the kids wake up. This car is not nap time friendly. |
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