When i start my car the clear filter before the carb wont fill up after i put in my new fuel pump. And it bogs off the line. I know the pump is working because i Took the line off the carb and ran it into a fuel can and it worked fine. But i think it has some pressure keeping it from getting to the carb because when it starts it draws tiny amounts of fuel into there. Also when we had it off and we plugged the line with my finger it emtied like that. No its not the gas cap either i tryed it with out it on. So can you bleed fuel lines do think thats my problem.
You need to hook a fuel pressure guage to it to see if that pump is good. You don't need to blled fuel lines. Are you sure it's not sucking air somewhere....top of the tank maybe?
when i had the regulator it came with it was reading 7 psi but that was leaky to i have this ****ty 5 psi one right now and i know it can bring fuel up there because i put it in the gas can and it pumped a **** load of fuel into it. but when the line is on the carb its like the air wont let the gas fill up that filter. It runs but when i get on it from a stop it kind of studders and when i can get the little filter full it wont do that. Its weird and its bugging me
its a edelbrock and all the fuel lines are brand new. How would i check theneedles and seats and if they were bad would that ristrict fuel going into the carb?
Im gettting gas and once the engine is revved the gas can flow a little better. But when i come off idle at full throttle it bogs down like there is no gas and sometimes i can get the gas to fill up the filter and it will be fine off the line. Its really irritating.
Take the bowl or bowls off and holding the carb level try to blow through the fuel line. As the float will be hanging and off the needle , air will pass through. Slowly lift the float while still blowing and note when it gets restricted( when you cant blow anymore) The float should be in the half way position. Half way betwen hanging and fully closed. Thats just to get an idea where the float is opening and closing the needle,it's not the way to adjust it. If you find air is only passing through when the float is pretty high up then you'll know that its set wrong and you'll have to get the specs for that carb to reset the float. Maybe someone else in the forum can help you with that if you dont have them. rick
You are never going to see that clear filter full so don't relate that to any problem. 3 psi should more than feed your engine. It might be sucking air between the pump and tank. It might be a lot of things that aren't even fuel related. Maybe a vacuum leak or egr valve hanging open. Make real sure it isn't something else before you attack the carb, because then when you do find the real problem you will have to fix all the other ones you caused by jacking with the carb.
what should my vaccuum be at around 1000rpm right now its at like 5 but if i bring it up to around 1200 or 1500 it comes up to 20 psi which is "normal" on the gauge.
also i know there isnt supposed to be completely full but occasionally theres no fuel at all in there i dont even understadn how it runs.
On a street engine that is way low, plus it should idle smooth at lower rpms, unless it has an agressive cam grind. As the rpms come up the volume of the vacuum leak is a smaller percentage of the air coming through the intake so it isn't as noticeable. There are several ways to look for a vacuum leak. The one I prefer I am hesitant to reccomend as it can be dangerous if done improperly. I would say use a section of vacuum hose, put one end in you ear and "sniff" around the carb base or any suspected areas with the other end. You will be able to pinpoint the slightest leak because you will hear the hiss. I have an old mechanics stethascope with a section of vacuum hose on it that I like to use.
it idles smoothly but when i turn off the pump the filter fills up with air bubbles coming out of the carb side of the filter. But at soon as the pump comes on the filter emptys out and no fuel will go into it until the engine is started and once its started it still just barely brings fuel in and it comes in little bursts emptys out then bursts again.
there is a little hole on this piece of metal that sticks out of the black choke accuator. Its sucking in tons of air i dont know if its supposed to or not. when i put my finger on it the engine slows down and gets quieter.
check your float levels, they come incorect from the factory or atleast mine did if you still have the manual that came with the carb check it, if not i have the manual sitting around somewhere let me know if you need the proper float adjustment
(the little tube on top by the choke sucking air is the air bleed to the idle rich/lean adjusting screws, should be open)(if it ever does get clogged, ok to blow air back down it to clear)
a full gas filter is a dirty filter restricting the flow, the floats take care of the air
when you shut off the motor the floats are up and closed, air leaking back to the filter is more likely a leak in the hose from the filter to the carb or in the filter itself, check the 3/8" fitting also
****disconnect the gas line from the carb and plug it, run the pump just long enough to build 5lbs, if you have no leaks/good pump it should hold the pressure 10 minutes or so then slowly leak down. (isolates it to a carb problem and the pump is good)
how old is the carb, been sitting awhile, can be varnish, add a can of carb cleaner to a 1/2 full tank, won't hurt, may help
don't mess with the jets or floats yet, need to know what the motor is because there are special instructions for low Hg/big cam motors,
there are 3 (?) seperate problems, need to find the vacuum leak, fix the carb, then see if it needs tuning for the bog.
if the vacuum guage hooked up to the port on the back of the Edelbrock reads 5Hg (or less than 12+ minumum) at idle you have to find the leak and fix it. Check that first
goal of the carb fix is to have it hold 3-5psi + for 10 minutes with the engine off and everything hooked up = all is good,
please do the line pressure test to isolate it to the carb, new parts or not, test it, just plug the hose off the 3/8" carb fitting.
then if the line is good it is going to be time to remove the carb top (easy to do) and check for dirt in the float seat/sticking float/wrong float level. The carb manual is on the Edelbrock for setting the floats
I have checked the lines. Im gonna do all this stuff today later
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