wrapping up a big project which included new injectors, fuels lines, fpr, fpd, etc. Anyways most all the fuel system under the hood is full of air. Many modern cards have a bleeder built in and i am wondering how to do this on the old '73 280se. surely many of you guys have done this already.

Turn the key from off to run a few times. The fuel pump will pressurize the rails and the air will go out the return line to the tank. The car should fire up after a second or two of cranking after that.

__________________
Current:
2021 Charger Scat Pack Widebody "Sinabee"
2018 Durango R/T

Previous:
1972 280SE 4.5
2014 Jeep Grand Cherokee Limited "Hefe", 1992 Jeep Cherokee Laredo "Jeepy", 2006 Charger R/T "Hemi"
1999 Chrysler 300M - RIP @ 221k

i should have known you'd be the one to answer! what should the fuel pressure be?

~31 PSI give or take a pound.

__________________
Current:
2021 Charger Scat Pack Widebody "Sinabee"
2018 Durango R/T

Previous:
1972 280SE 4.5
2014 Jeep Grand Cherokee Limited "Hefe", 1992 Jeep Cherokee Laredo "Jeepy", 2006 Charger R/T "Hemi"
1999 Chrysler 300M - RIP @ 221k

well it cranks right up but it immediately idles VERY high. I imagine this thing was tweaked to run as optimally as possible when things should have been fixed so things are probably way out of whack. the entire fuel system under the hood is brand new, all new air hoses, seals etc. so as far as i know there are a few ways to adjust things. TPS, screw near the cold start injector... i havent adjusted the fuel pressure yet because i didnt want to let it idle to long like that, could high or low fuel pressure cause this?

ah ha! turned out i missed air hose right under that cold start injector! idle is much more tame now