Possible fuel or ECM issue?

[Dixie01]

I'm new here so if I'm doing this wrong please forgive me. My 84 cj has a gremlin. It will run fine for days, then give the symptoms of fuel starvation and bog down and eventually quit. It will run again after sitting. Already re-routed few lines cause I thought it was vapor locking. I have not changed the ECM though. Thinking about doing the stealth hei mod. Any help would be greatly appreciated. Greetings from Roll Tide country.

 

[Saddle Tramp]

Do you have the OEM fuel vapor canister and a return fuel line to the tank? The fuel filter should have one line in and two lines out; to the carb and the return as without it vapor lock symptoms can occur. Vacuum line leaks can give you troubles too.

 

[Dixie01]

There is a return just like you described. I guess I should mention when it quit on me yesterday, I removed the air filter and worked the carb and it sprayed fine. Also it seems to only occur when tank is 1/2 or more full. Also extreme smell of raw gas at rear. Aftermarket steel tank, with signs of past leakage from sending unit area. I just haven't determined if it is fuel or fire related.