has anybody running obd2 used a programmable obd1 ecu in parallel to control fueling?

 

I think you should at least provide more details.

I can envision at least some problems if you simply wire up a second ECU - for instance, the coolant/temperature resistor divider circuits would get crazy. So, not sure how to feed signals into both ECUs.

 

i noticed this was still high in the topics. is the site dead now?

 

This site still has great information, many answers are on here if you search for it. When it comes to the original best guys full of great info, no, they don't get on as much or not at all. And why should they?Tthe same questions are asked daily that are on here already answered 100s of times. After that big dispute, things just don't seem the same, and that might just be a coincidence. I spend my time on here, pgmfi and honda-tech. but you won't find the elite guys on much on any of them.

I don't see why you want to do what you want to do. Run one ecu, if its for legal reasons, then hack it or swap it back for inspection time. Or better yet, spend lots of money and get a standalone.

 

The ECU forum doesn't get much traffic here. We have a tech article on our website on parallel ECU installation. It's intended for aftermarket ECUs, but a lot of it could apply to Hondas as well.

Installing Megasquirt in parallel with the stock ECU