Nikki wont stay running

[banzaitoyota]

12A RX2 unknown mods to car. It will start and idle if I prime the carb. I have good fuewl pressure to the carb. Where do I start?

[banzaitoyota]

here is the problem child

[Sterling]

Beautiful carb. Same one I have on my Rx-7.

By "priming" I'm assuming you're opening her up and filling the bowls manually.

The first rule in carb troubleshooting is "Follow the Fuel".
Start with the pump. Is it running? Check the fuse. It should kick on for a second when ignition is first engaged, though I'm not first-hand familiar with pre Rx-7 models.

Next up is the filter. I suggest that the filter would rarely be the culprit in a case like this because if the pump is working then you have an actual obstruction in route from the tank to the carb. But if you have large flecks of crap in the filter from inside the tank, it can help in your diagnosis.

Be sure the tank is breathing properly. When a tank becomes vapor-locked the whole fuel system gets screwed up. If you remove the cap and the tank "whooshes" excessively, there's a problem somewhere.

Blow through the return line to the tank by mouth to be sure it's not obstructed.

[banzaitoyota]

Here is a graphic of what I have found. I blew thru the return line it is clear

[banzaitoyota]

More Info:

Car has a Fuel cell, Facet Pump / standard inline filter

Need to check pressure in the AM.

[banzaitoyota]

found one problem, Previous owner had fuel lines run backwards

and the unknown connection is the choke shaft tube:ugh2:

[Sterling]

The part circled in the diagram is where the linkage for the choke rod goes. It's not a port.

-ya beat me.

[banzaitoyota]

I'll put a fuel pressure gage on it in the morning

[Sterling]

I'll check in mid morning Eastern time. ;)

[banzaitoyota]

It runs!!!!! Now to fix the brakes