LC-1 Intermitent? Please Help
 

OK so I installed my MSPNP and my LC-1 last week. Car runs better than I thought it would but the problem is my LC-1 has not been working right. I did the calibration a couple times and got it to work and display in Megatune. I took it for a short ride and everthing looked to be reading right. Now when I start the car it wont read more than 7:1 and the led for the LC-1 blinks 4 times. I did notice that if I turn the ignition on and let the led blink until it stay solid, then start the car everything seems good. This only works sometimes though.

Any thoughts would be a big help. I wish there was someone in the area that could help, but I dont think anyone is around here.

You're getting error code 4, pump cell circuit open. This could be one of the following:

1. A bad sensor
2. A damaged sensor cable
3. The connector not completely seated at the LC-1
4. Bad sensor heater calibration

#4 is the easiest to check - try recalibrating the heater circuit, not just doing a free air calibration.

I have done this. It will work for a bit. If i turn the key to on and wait for the led to go solid then start the car its fine. If i just start the car without the led going solid it show error code 4. Then i have to redo all the calibration to get it to work properly.

I'm new at this and just want this thing working right before I try to auto tune the car.

How are the LC-1's power and ground circuits connected?

All grounds are grounded into one lug on the back of the block. Power is tapped off of the radio circuit.

That may be your problem - it's losing power while cranking.

Point me in the right direction.

you need to power it from a source that is hot whenever the key is on. the radio power cuts out while cranking.

Where can I get that. I read somewhere to take it off the ECU harness. Which pin and how? With a wire tap or cut and splice?

I contacted support and this is wrong. It needs to cut power while cranking because the voltage drop does not agree with the controller. Anyway they had me check a few things and said sounds like it is internal in the unit so I am sending it back.