I'm putting an MS2 and an LC-1 in a BMW I recently bought. I'm putting the MS inside the stock ECU case and was wondering if running the LC-1 power,ground, and analog out into the case (soldered to either the MS board or stock ECU pin) would cause any problems? I know the MS and LC-1 should be grounded at the same point, but am curious about the current from the heater in the LC-1 possibly causing issues.
Thanks, Dave
Megasquirt/LC-1 question
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Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
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nitrousdave
- MegaSquirt Newbie
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- Location: indiana
Re: Megasquirt/LC-1 question
Hey Dave-
Definitely do not run power to LC-1 from the MS2 power in the case. LC-1 is a very noisy unit; both conducted and radiated. Put a scope on it, or turn it on/off with an AM radio antenna around, you will see what I mean. Both units will be much happier the further away they are getting their power. Also- be sure to mount the LC-1 controller away from any heat; engine compartment = bad, below on frame rail = good. I learned these lessons already, and once it works... it works great.
Grounding individually at the engine block will avoid any potential for ground loops, and big fat soldered grounds are always a better long term build.
Scott.
Definitely do not run power to LC-1 from the MS2 power in the case. LC-1 is a very noisy unit; both conducted and radiated. Put a scope on it, or turn it on/off with an AM radio antenna around, you will see what I mean. Both units will be much happier the further away they are getting their power. Also- be sure to mount the LC-1 controller away from any heat; engine compartment = bad, below on frame rail = good. I learned these lessons already, and once it works... it works great.
Grounding individually at the engine block will avoid any potential for ground loops, and big fat soldered grounds are always a better long term build.
Scott.
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Sequencer (beta) accumulating miles on E12 M90 635csi
& Squirted Pontiac Bubbletop
Sequencer (beta) accumulating miles on E12 M90 635csi
& Squirted Pontiac Bubbletop
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nitrousdave
- MegaSquirt Newbie
- Posts: 3
- Joined: Thu Jun 30, 2005 4:40 am
- Location: indiana
Re: Megasquirt/LC-1 question
Cool, that's pretty much what I figured. I have another one on my mustang but that one's carb'd so there wasn't an ECU to worry about. I'm actually using the original BMW grounds which surprisingly are in decent shape. I'm going to ground both of them inside the stock ECU case.