LC-1 Help

[Tiny Tim]

Getting to the end of my teather now.

In a nutshell, I bought an LC-1 with DB gauge from a member who's now done a Lucan. At first I couldnt get it to work, so contacted Graham Goode racing. 2 months later they send out a replacement Lambda which i've just fitted. Still no joy.

Basically, after the initial 20 second power on without the sensor, then connect the sensor... even after 10 minutes its still stone cold.

From what I understand the blue wire is the heater wire correct? What can I check for people? I have a feeling i've been sold a duff unit.

[James5]

Correct Mr Tiny the blue wire is the Heater ground have you got his grounded to the same point as the white wire (Solder the white and blue wires together then ground)?

[Tiny Tim]

No, grounded seperately as I was told it can cause interferance if put together.

[James5]

What locations have you used for grounding?

Does the gauge work?

[Tiny Tim]

Oh, here and there lol Cars stripped and most of the wiring has been tucked away so i've been using the fusebox and some relays.

The gauge 'works' when connected (have tried to get the lc-1 working with and without it connected) but sits at 7.4 and just flashes. With the gauge connected to the LC-1, when I remove the heater earth the gauge reads around 22... which suggests to me the LC-1's getting power of sorts. gods knows whats going on.

[James5]

If memory serves me right I think the DB gauge should show something even when not connected to the LC-1.

You got the DB gauge wired up correct?

When you were talking blue wire I take it you were talking about the LC-1 and not the DB gauge? As the DB gauge blue wire should be connected to the brown wire of the LC-1

DB Gauge Red - should be a switched on (So ignition switch)
DB Gauge Black - earth point (For example under the steering wheel column),
DB Gauge Purple - to a ground point
DB Gauge Blue - should be connected to Brown LC-1

[Tiny Tim]

Yup. thats how i've got it. That doesnt explan why the lambdas not heating up though.

[James5]

I was just making sure it was all wired up correct, sounds like another dogey sensor though

[Tiny Tim]

Dont say that, I cant be dealing with waiting another 2 months

Is there any way I can test there's power going to the LC-1 and thus the sensor?

[5teve L]

Dodgy sensor of dodgy LC-1 unit
When you go to Nat day see if someone will let you hook up to thier LC-1, that will eliminate another duff sensor.

[Tiny Tim]

Yeah, thats an Idea Steve

[car.crash]

Correct Mr Tiny the blue wire is the Heater ground have you got his grounded to the same point as the white wire (Solder the white and blue wires together then ground)?

tim do that and use a decent earth striaght to the body.

[Tiny Tim]

tim do that and use a decent earth striaght to the body.

Ok mate, i'll give it a pop tomorrow. Take it they dont suffer interferance if together?

[5teve L]

Mine was all earthed to the same spot under the dash, steering colomn mate

[Tiny Tim]

Coolio. Im sure i've tried that already, but no harm in giving it another go.

[Nayls]

i have mine earthed to the firewall,same place the block is earthed from near the waterpump,
the manual say's to use an engine earth.


is your sensor power wire connected to the same place as the gauge's power supply?

[Tiny Tim]

No. Perm for the lc1 and switched for the gauge.

[James5]

LC-1 and DB should both be switched lives matey so run them of the ignition

Othewise the LC-1 will be on constantly when your not in the car

[Tiny Tim]

Ah.



Okaaay.


Thought it might need a perm to keep the calibration settings.

I'll be up first thing tomorrow to try that. cheers peeps.

[Tiny Tim]

Well that didnt work, im off to shoot myself

[BriC]

Yaaaaaaay

[Adey aka Ewok]

do it friday night so we can all see

[Martyn....11 Turbo]

do it friday night so we can all see

Its all about the evenings entertainment