"piggybacking" std ECU for datalogging

For discussing how to choose sensors and create a wiring harness for all Bowling and Grippo versions of the MegaSquirt® EFI controller.
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Metalfab_101
MegaSquirt Newbie
Posts: 5
Joined: Fri Mar 11, 2005 10:30 pm
Location: Qld, Australia

"piggybacking" std ECU for datalogging

Post 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.
Matt Cramer
Super Squirter
Posts: 2951
Joined: Sat Jul 03, 2004 11:35 am

Re: "piggybacking" std ECU for datalogging

Post 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
Metalfab_101
MegaSquirt Newbie
Posts: 5
Joined: Fri Mar 11, 2005 10:30 pm
Location: Qld, Australia

Re: "piggybacking" std ECU for datalogging

Post by Metalfab_101 »

Thanks Matt, the article is very helpful.
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