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"piggybacking" std ECU for datalogging

Posted: Fri Apr 09, 2010 2:04 am
by Metalfab_101
On my first MS install a few years ago I converted a carb'd engine, and while it was still running on the carb I had the MS hooked up to all the sensors and was able to datalog and check that I wasn't getting resets. It also ended up logging the ignition curve of the stock dizzy, though I never used that to set up ignition on my MS install.

Now I have a EFI vehicle and want to do the same sort of thing. If I just go and connect the MS to the stock sensors with the original ECU still in place, are they going to share them OK? I thought that as long as my grounds were good and there was no difference in potential between the two ECUs it should work fine.

thanks!

Damo.

Re: "piggybacking" std ECU for datalogging

Posted: Fri Apr 09, 2010 4:27 am
by Matt Cramer
We have an article on parallel installations that covers what sensors can be shared and what sensors can't.

http://www.DIYAutoTune.com/tech_article ... rallel.htm

Re: "piggybacking" std ECU for datalogging

Posted: Fri Apr 09, 2010 1:14 pm
by Metalfab_101
Thanks Matt, the article is very helpful.