Hi , so I swapped out a dead efi for an edelbrock 1410. I kept the electric fuel pump and added a regulator with bypass. So I've got 5.3psi at the carb. Problem is, the engine starts but to keep it running I need to give and hold it at about 25% throttle. If I bring it back to neutral it stalls. What do I need to adjust here to have it idle at neutral without throttle? Thanks

Engine specs ?
ignition and verified timing specs ?

It's a Gen V mercruiser 7.4l 330hp / bravo 1. Since it's not currently running right I didn't think I could check or adjust the timing unless I could first get it to idle in neutral. Currently I can only run the engine under some throttle . Nevertheless until my Fitech died 3 weeks ago the engine was running fine at whatever timing it's currently set at. Edelbrock told me the solution is to do with adjusting the mixture screws and the idle screw on the carb. But as for the mixture screws I'm not sure if my situation is a too lean or too rich deal... I was hoping to figure which direction to start with on that.

Okay, well, we need that verified. Ignition must be working correctly and set correctly before moving on to possible carb issues.

Also, what spacer or adapter did you use to seal the carb to the OE Quadrajet intake ? Or is it another intake ? Asking, because you could have a vacuum leak.

I used the edelbrock 2696 spacer with all their gaskets. The engine runs very well, only I need to give throttle . No missing or weirdness.

You said you swapped out for the edelbrock carb but is it new or used. Is tge choke working properly? Maybe zip tie it open and adjust your mixture screws. Start with backing them out a half turn at a time and fine tune from there. If you can’t figure it out within minutes something’s gotta be screwed up the the circuitry. Find another carb of any sort just to try.

Brand new 1410 out of the box . Yes electric choke works properly, I looked at that to be sure.

did your fitech control ignition?

No ignition is original. I only kept the electric fuel pump and added a bypass regulator and pressure guage after it.

Are the ignitions the same or compatible with one another. I didn’t think about that.