Clicking sound coming from MS board.

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anuwer
MegaSquirt Newbie
Posts: 1
Joined: Thu Nov 21, 2013 3:23 pm
Location: Bloomington, IN
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Clicking sound coming from MS board.

Post by anuwer »

Hello and thanks for taking your time to read this post.

I build an ms-II V3.0 about five years ago and used it to run the ignition system on a dodge 360 for several years without incident. It then sat on a shelf until recently I've used it to power a fuel only, coil negative triggered mpfi setup on a dodge 2.2 liter. And yes I followed the assembly guide to the letter about placing the zener diode etc etc).

It worked fine for a month or so, but a worrying clicking sound was coming from the board that corresponded with (I think) the tach input.
Now it's dead(ish) and I have a brand new MSII V3.57 to replace it (jumpered to bring in the signal on the opto-isolator).

The clicking sound is still there and I'm quite wary. Is this normal or horribly wrong?
Should I just give up on coil neg triggering and fabricate a crank wheel?

Any feedback is welcomed, and thanks again.
Matt Cramer
Super Squirter
Posts: 2951
Joined: Sat Jul 03, 2004 11:35 am

Re: Clicking sound coming from MS board.

Post by Matt Cramer »

There shouldn't be any components on the MegaSquirt itself that click. About where on the board is the noise coming from?
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