engine hesitation issues Options

[rosenfe]

my 73 2.0 started hesitating just this week when i rev at end of 1,2,3 gear,acts as though its not getting fuel,and it will just die if i come to an stop.i can get it started again,but it takes a bit of cranking. it will then run well and i have to keep revs up to avoid it dying at a stop .i changed fuel filters,have not changed tank sock.fuel pump is running.it has 2- 34 carbs, fairly new..


is this enough info to get some opinions.i wonder if either the fuel sock is full of crap or fuel pump is bad.it too is fairly new.

[colingreene]

the fuel sock you can check easily. start there work your way back
do you have inline filters on the carbs?

[rhodyguy]

Agreed on the tank strainer sock/filter. Can you make the stumble occur while parked and keeping the engine at driving rpm?

[rosenfe]

i have 2 inline filters,clear and then the plastic aluminum one,i changed both of them.at idle if i rev no stumble.this issue has progressively gotten worse.it began as a very slight stumble under load.then car would die at idle as though it was not getting gas.yesterday i drove to work for about an hour and there was a hesitaion occasionally.on way home ,it dies as i was slowing down on freeway.got it started after a lot of cranking,could hear fuel pump running.the rest of way home i had to keep revs up whenever i came to a stop.it finally dies again at top of driveway allowing me to coast to my garage.

do i need to take tank out for sock filter.or can i get it from below.

just wondering if the electric inline fuel pump is going,or if pressure regulator is bad.i do get quite a bit of smoke on startup.

[rhodyguy]

Rotary or facet pump? I think you might be able to replace the sock with the tank in but pulling the tank isn't that big of a chore. Great opportunity to get the tank nice and clean. Use the fp to empty the tank and look down the fill neck with a flashlight while the tank is still in place. Typically the sock gets sucked flat when it's all gummed up and under vacuum. The vacuum eases when the pump isn't running and may allow some fuel to exit the tank.

[rosenfe]

ill take tank out,had it out several months ago,should have changed sock then. ,good idea about useing fuel pump to empty tank.sock getting sucked flat makes sense.

[rosenfe]

not sure about rotart vs facet.its an inline electric is all i know,added after converting to carbs

[rhodyguy]

Does the pump make a 'whirring' or a rattelly/ clacking sound while running? The facet pumps are squarish and the rotary is round.

[rosenfe]

its round ,making a whirring sound.must be rotary.

[rhodyguy]

Is there a smallish metal canister still attached to the supply side of the pump?

[rosenfe]

ive gotten tank out,but dont see how i get to sock inside.any tricks to changing out sock.?ive taken nuts off of bottom inlet and outlet pipes,and removed the copper pipes.one to screen had debris in it,sock looks intact viewing it from filler hole.

[rosenfe]

do the threaded nipples on bottom of gas tank that copper pipes insert into just pull out the bottom after nut removal?

[bdstone914]

do the threaded nipples on bottom of gas tank that copper pipes insert into just pull out the bottom after nut removal?

Yes but they can get stuck. Try to rotate them to break them loose. Twist and pull.

[rhodyguy]

Does the sock look like it's sucked flat? Rotary914 has the proper washers for reassembly.

[rosenfe]

viweing from above sock is not flat..i will have it out today or tommorow,but i did find crap in the copper pipe attched to sock side of tank.as you said, im starting at tank,if problem persists i will change out fuel pump.it certainly cant hurt to change sock.

[rosenfe]

i did get washers and sock from aa.

[rosenfe]

so im following up with my fuel starvation issue.after changing sock,filters i still had the problem.in fact now i was getting no fuel to pump at all.pump works,but i realized that plastic fuel hose to rubber taper hose from 9.5mm to 8 was old and getting crimped with the bend required to turn 90 degrees and connect to filter and pump.

i dont want to replace plastic to stainless steel at this time,but did notice that tangerine has a short curved ss line that is the same as rubber taper hose with 9.5 on one end to fit over plastic fuel hose and 8 on other end ot fit fuel hose to filter and pump.

im trying to think of any alternative way to bush down without having to buy ss hose from tangerine.any ideas,its a tight fit with pump pressure regulator and filters.

[mepstein]

I'm not sure why you wouldn't go with a proven solution like tangerine. There have been 914's that have caught on fire and burned to the ground due to old plastic fuel lines. Tangerine has all the proper parts to do it right.

[Dave_Darling]

You can make a step-down piece out of larger and smaller hoses plus brass plumbing supplies. It will take up more space than the SS line specifically built for this purpose, though.

--DD

[rosenfe]

so what brass pieces are you referring to?.what diameter of brass should i use?