Well, glad to be a new member here, I managed to get my hands on a rather modified 1980 CJ7 with an AMC 360 and what appears to be a DIY TBI setup. When I start this thing up, it leaves a nice black blast of soot on the wall of my garage, and I can't figure out why. When I pull the plugs on each bank, I would expect one or both to be black, but they're not. They're slightly brown and not black at all. I noticed it idles high, around 1200 RPMs, but with this DIY TBI I'm not entirely sure of how to lower it and if it'll help me stop leaving Jackson Pollack paintings on the wall of my garage before my wife kills me.
Can someone point me in the right direction? I've been around modern cars, and this old school Jeep thing is awesome but I'm definitely on a learning curve going from EFI/standalone systems to 40 year old tech with TBI.