I hope the thread name is better this time.
I am trying to troubleshoot my LC-1 that is connected to my MSpnp with a brown analog #2 wire through stock plug next to CAS, the lc-1 gets power from a plug that is used for connecting the timing light so its not hot when cranking. All the negative wires are connected together into one plug and grounded to the bolt on the back of the head. There are two ground bolts there so i am not sure which i have to use, so the one in the picture is NOT
the one i connected it to. The one i connected the ground to is the one that is lower and a little closer to the passenger side.
Everything was running fine for a few days, car idles great and drove well. But later the cars started to cut off. When i was driving in 3 gear pretty slow the revs momentarily go down from like 3k to 2k and the car stuttered and was back to normal in split second time. This happened several times.,
Something similar happens when the car is idling. Everything would be fine and then suddenly the afr would go from 15 to 19 the car would stutter and go back again to normal.
It almost feels like its a bad ground.
1. Is my LC-1 wired right?
2. Where is the best place to wire positive LC-1 wire so its hot when cranking. Please tell me the exact wire. I am really terrible with wiring. I know there is a fuse box but i have no idea which wire to cut into.
3. Which ground is the ECU ground? the one in the picture above or the other one next to it.
4. I want to set up a gauge that came with LC-1. I tried to reprogram Analog#1 to show wideband reading just like Analog#2, it did show the same reading that LogWorks did on the screen of my PC but made the car run rough at idle and showed very lean reading like 19. After i unplugged the gauge and started the car again it ran fine.
I did read both MSPnP and LC-1 manuals multiple times and i did reset the LC-1 and performed Free Air calibration.
Please help me out here i spent all night trying to figure out this problem and getting hopeless.