BMW 2002 FAQ - Megasquirt with Innovate LC-1 Question

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Thread Topic: Megasquirt with Innovate LC-1 Question

Date: 7-9-08 08:34 From: slash02 in Calgary Subject: Megasquirt with Innovate LC-1 Question
Hey, I just got an LC-1 and have it all wired in. all is well, however when I start the 02, it seems the LC-1 shuts off or displays a static af ratio. Probably a wiring issue. So question is, where did you guys wire power for your LC-1? I'm thinking 12v direct to battery through a relay switched via ignition is best? Yes, MS and LC-1 are using the same ground lug.

Date: 7-9-08 08:57 From: themoose in Scottsdale, AZ Subject: Re: Megasquirt with Innovate LC-1 Question
I have mine wired to a switched 12v source. No relay needed. _________________ '74 2002 (undergoing Megasquirt conversion!)

Date: 7-9-08 09:11
From: slash02 in Calgary

Subject: Re: Megasquirt with Innovate LC-1 Question

themoose wrote:

I have mine wired to a switched 12v source. No relay needed.

I have mine wired to that "green wire" under the hood, which is a switched 12v source. What source did you use?

Date: 7-9-08 10:03 From: themoose in Scottsdale, AZ Subject: Re: Megasquirt with Innovate LC-1 Question
I'll have to look when I get home. Have you calibrated the sensor yet? _________________ '74 2002 (undergoing Megasquirt conversion!)

Date: 7-9-08 10:32
From: slash02 in Calgary

Subject: Re: Megasquirt with Innovate LC-1 Question

themoose wrote:

I'll have to look when I get home. Have you calibrated the sensor yet?

Yeah, its calibrated. I am thinking that the starting current might be freaking my LC-1 out a little bit. My external gauge and megasquirt do concur on the AF ratio when the car is not running. Weirdness.

Date: 7-9-08 10:40 From: Grover in El Cerrito, CA Subject: Re: Megasquirt with Innovate LC-1 Question
I have mine wired to a 12v switched source, I think from an empty terminal on fuse number 10. I presume you are giving the LC1 sufficient time to warm up? Mine generally doesn't give an accurate reading for 20 or 30 seconds or so. Do you have the LED light hooked up? If so, the way it flashes can be an indication of what your problem might be.

Date: 7-9-08 10:44
From: slash02 in Calgary

Subject: Re: Megasquirt with Innovate LC-1 Question

Grover wrote:

I have mine wired to a 12v switched source, I think from an empty terminal on fuse number 10. I presume you are giving the LC1 sufficient time to warm up? Mine generally doesn't give an accurate reading for 20 or 30 seconds or so. Do you have the LED light hooked up? If so, the way it flashes can be an indication of what your problem might be.

hmm I'll look at fuse 10. :) It could even be that where I have the LC1 hooked up is seeing a crazy voltage drop during cranking and it is affected.

Yes, the LED light is hooked up. When the vehicle is running, I should see the led flash until the heater goes out then stay on? Mine does eventually go out.

I am giving it plenty of time to warm up as well.

Date: 7-9-08 11:01 From: 2002Targa in Kodiak, AK Subject: Re: Megasquirt with Innovate LC-1 Question
Try hooking your 02 sensor up to a relay lead coming out of the fuel pump power from the MS system, that way if the motor is not running the 02 sensor won't sit there burning away. TK _________________ Life's a garden baby, dig it. My web album 75 Fjord 73 RHD Targa

Date: 7-9-08 11:03
From: slash02 in Calgary

Subject: Re: Megasquirt with Innovate LC-1 Question

2002Targa wrote:

Try hooking your 02 sensor up to a relay lead coming out of the fuel pump power from the MS system, that way if the motor is not running the 02 sensor won't sit there burning away.

TK

When I first wired it, I was thinking just that. I think i'll go with that :)

Date: 7-9-08 05:29 From: Harv in Willoughby Oh. Subject: Re: Megasquirt with Innovate LC-1 Question
Are you sure the LC1 is getting voltage WHILE starting? Some 12v sources go dead when the switch is in the start position. John _________________ I suggest you sit down and dedicate a couple of hours to this thread. OOPS! NEW LINK! TRY IT NOW http://forums.vwvortex.com/zerothread?id=2224141&page=1 #1665778

Date: 7-12-08 02:04 From: slash02 in Calgary Subject: Re: Megasquirt with Innovate LC-1 Question SOLVED
Ran a thick ground for the LC-1, it was rebooting, probably picking up ignition noise. Grounded the MS, LC-1 and gauge the the same point. All better.

Date: 7-12-08 02:06
From: slash02 in Calgary

Subject: Re: Megasquirt with Innovate LC-1 Question

Harv wrote:

Are you sure the LC1 is getting voltage WHILE starting? Some 12v sources go dead when the switch is in the start position.

John

Yeah, during my troubleshooting that was my concern, I ran a wire right to the battery and powered it that way. It was that which led me to a better ground :)

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