rosaaen89

i’ll try to run the baby bottle of fuel right before the pump to see what happens and let you guys know what happens. if the line is stopped up is the only way to get around that just replacing the hard lines that run from the tank to the engine bay or is there some way to get them cleaned out

awesome i’ll get that done as well and check for any crud in the tank

sounds good i’ll try this out and see what happens

i did run the car off fuel by manually filling the carb bowls. it does run off that then dies but still has the sputtering issue running at like 60-70%. can i drain the tank without dropping it ? sorry i know these are probably dumb questions but i’m fairly new to the datsun and thank you for all of your help.

the other day when i was blowing from the line to get fuel to get it started i did catch some fuel inside of a water bottle and it was a little darker orangish color. maybe it’s just year old fuel or maybe it’s from crud? when i get home later i’ll upload some pictures to give you better idea what i’m talking about as well

before i bought the car and made the 30min drive home i was with the previous owner and he did blow into that line and i did hear bubbling in the gas tank. i still probably should drain the tank and try to get it cleaned out. Previous owner told me he had the tank cleaned out and sealed so no rust issues would occur with the tank. but it’s probably best for me to make sure of it myself. if the tank is indeed filled with gunk what’s the best way to clean it all out ?

yeah i push it back into the filter so i can get it started. once i do that sometimes it’ll continue to run and idle, other times it’ll die. i haven’t noticed any fuel leaks, but there is stronger fuel scents than there should be. i moved the nozzle manually by the lever itself without choke cables attached and they’ll now both move up and down. if u move the nozzles all the way down they get stuck.

i replaced fuel filter it’s a clear one. fuel pump is new and it’s mechanical . i just now removed the cables for the choke. when i move by hand the nozzle on the bottom of front carb moves down and up some but the nozzle on the rear carb when moving the choke by hand doesn’t move up and down at all. Also i think one of the clamps that holds the small hose running from the nozzle to the bowl might’ve had a pin hole in it from being old and brittle but not sure if it happened when i removed it.

i’m going to double check all the fuel hoses and carb hoses . thing is the car will start but i have to prime it by blowing the rubber hose off the return line with air so the fuel filter fills up then starting it. sometimes it’ll die once that fuels gone or it’ll actually keep pressure and run/idle for as long as i want it until it sits for a day or two

i will probably order the float sync , i was thinking about taking it to a local mechanic but i’m in the middle of nowhere in new mexico so i doubt they know much either. if the mixture is off/floats not correct though would that keep it from running ? or just make it run really poor ?

i don’t have an airflow meter at the moment. when i pulled the spark plugs the front 3 were light tan/ whitish and the back 3 were black with carbon built up on them

so i just picked up a 71 240z. engine is a stock l24 with e31 head. only modification is a flamethrower ignition . car was running rough probably about 60-70% of its capabilities. so previous owner parked it and was sitting for about a year. i replaced the mechanical fuel pump , installed new spark plugs, wires , distributor cap and still runs exactly the same. i had to blow air through the return line in the fuel system to get it running so the fuel filter would actually fill up to keep the engine running. to me it seems like the carburetors aren’t getting enough fuel. i was thinking of either rebuilding them myself or ordering new ones from ztherapy, but i don’t want to do that (mainly ordering new ones) if it’s not the issue. so i was wondering if someone could help me out in trying to diagnose it instead of just throwing a ton of money at it. i also noticed the carb damper oil was real low if any at all so i filled that up.