roughskinjrz

hey, last night the motor ran perfectly, today i went to start it, it fired up for a second, then shut off(assuming left over gas sitting in the carb), now i cant get the motor to start at all.

i move the throttle on the carb, i see no gas, i take off the fuel line, no gas is coming out of the hose.

i take off the hose from the fuel pump, there is no gas coming out of the little line coming out of the fuel pump i put the hose over.

does this mean the fuel pump is bad??

roughskinjrz

oh by the way, its a carbureted '72 350, so the fuel pump is on the motor on the passenger side.

Dialed_In

iTrader: (3)

Could be something wrong with the pump pushrod, maybe that's the noise you were referring to in the other thread

roughskinjrz

what is the fuel pump pushrod, will i have to purchase a new fuel pump?

here is a picture of the fuel pump, is the arrow pointing to the fuel pump pushrod??

click this link to see it:

http://img313.imageshack.us/img313/4380/fuelpump1qy.jpg

Dialed_In

iTrader: (3)

The pushrod is what drives the pump. It goes from the pump up through the block and rides on a lobe on the front of the cam. I moves the part that the arrow is pointing to in the picture.

roughskinjrz

no way, how would i fix that, take apart the motor?

roughskinjrz

hmm that sounds like a big job if its connects to the cam. would that be bad if i get no gas to the carburetor at all? i figured it would be the fuel pump, i was going to get one at canadian tire, they are 22$ CAD

roughskinjrz

also if i pour gas down the carburetor, the motor starts right up

Dialed_In

iTrader: (3)

it's unlikely, they don't just "go bad" but if something was improperly installed anythings possible. Do you have gas in the tank? Is fuel getting to the inlet?

roughskinjrz

fuel going to the inlet, what do you mean?

and the tank is 1/2 full

Dialed_In

iTrader: (3)

are you sure fuel is getting to the pump?

roughskinjrz

not sure how to tell, when i was taking out the pump, gas was spilling everywhere.. i had a steel hose about 4 inches up the motor, then turns into a rubber hose, that steel line was full..

inside the fuel pump was fuel cuz if i turned it upside down gas fell out

sellmanb

When you take off the fuel pump from the block there will be a big pushrod inside the hole where the fuel pump used to be. It isnt any bigger of a deal than taking the fuel pump off so dont worry about that


Basically, there's an extra cam lobe for fuel pumps. It pushes on the little tang/tab that goes into the block, which is what pushes the fuel.

If you dont have a fuel pump push rod then there's your problem. I would be concerned about where your old one went though!

roughskinjrz

ok it should still be there, ill be sure to check tomorrow morning before i bolt on the fuel pump. if the pushrod is still there, does that mean its fine and i can bolt up the new fuel pump?

kboehringer

Should be fine.

Make sure the rod is sitting on the lever as you bolt it up.

The instructions with the new fuel pump will certainly indicate using a small amount of lubricant on the lever assy.

Just follow the intructions.... You'll be fine!

roughskinjrz

yeah alright ill do that, the steel fuel line is seized onto the old fuel pump, so i have to go get a new one. lol.

sellmanb

good luck. I had to bend my own, none of the local parts suppliers had any. Boy what a pain! I went through atleast 3 sets of tubes before I got it right lol.

roughskinjrz

man, i hope i can get my old one off then!!

if it is my fuel pump pushord that is ****ed, how hard is it to put in?

kboehringer

VERY VERY UNLIKELY!

If it is screwed up it could have damaged the Cam. The rod is hardened steel and if you messed it up you'd have serious darn problems....... Again.... It's likely in perfect condition.

The rod may be hard to see if you have the large cover plate behind the pump... use a flashlight. The car just didn't get fuel and wouldn't start right?

I'd bet $20 you just have a bad pump. Don't loose any sleep thinking the rod is messed up. Very likely it's just fine!!

kboehringer

If your set-up is like this (w/Cover plate) it will be hard to see. The Pump lever goes down in the hole and the rod pushes on it.
The RED line indicates the basic line the rod follows to the cam.

roughskinjrz

yeah well when i pour gas down the carb it fires up, but i took the house off the car and no gas comes out of the hose.

where the fuel pump goes, its just 2 bolts, and a little hole where the arm goes in, ill try and get in on an angle and see the rod, what if i just stick my finger in and feel it to see if something is sticking out there?

Stekman

You'd feel it. Unless it fell out already, it ain't going anywhere. And if it didn't fall out, then there may be a bigger issue at hand, because once the pump comes off, nothing is holding the pushrod in place. And, at least mine, slides up and down rather easily...

roughskinjrz

well im not gonna **** around with it, ill just lightly touch it to see if its still there, and put the new pump in.

rgarcia63

If you want to pull the rod out use a magnet.
After you put the rod back in, or before you put the new pump on, use something to push on the rod (wooded dowel) while turn the crank manually until the rod is riding on the concentric part of the cam instead of the lobe high point, this will make it easier to get the bolts started.

roughskinjrz

thanks guy, installed a new fuel pump fires up without hesitation.

do i need to install a fuel filter, it never had one on there before?

kboehringer

There is a small filter inside the carb. It is right behind where you attached the fuel line to the carb. It's a tiny little filter but it'll cost about $5 at Autozone. If it's never been changed, you should probably put it on your list of things to do.

You could put an extra one in if you like. If so it must go between the pump and the carb. Some guys don't feel comfortable without one. I personally don't have an extra installed.

roughskinjrz

ok thanks, i have one, but i doubt ill put it on, doesnt seem to fit..

roughskinjrz

ok i think this fuel pump i have now my have went bad, i just boughti t over a month ago, started the car then, then never touched it in a month, i replaced pushrods and rocker arms, and i went to start it, no gas going in the car. not gas coming out of the fuel line. go to unbolt the fuel pump, so i take off the fuel line hose attached to the pump and gas dribbles out, quite a bit just leaks on the ground

any ideas

roughskinjrz

any takers? im about to bring back the fuel pump, do you think its just another fuel pump?

Lo-tec

Maybe the pump and lines are empty and need to be primed? Fill the bowls with gas to get it to run, and if the pumps good it should work the air out of the lines and start pumping fuel. If not, probably junk pump.

roughskinjrz

well i literally pumped non stop for 5 minutes, and no gas was coming up, so i took off the fuel line and nothing came out, then i took it off down by the fuel pump, and some gas started falling out, so i took off the fuel pump, and lines leading back to the gas tank? gas came out of those, so im guessing its another fuel pump.

roughskinjrz

ok i installed the new pump, still no gas getting into the carb. i pumped the throttle on the carb for like 3 minutes. i took off the gas line off the carb, nothing came off. i pushed the pushrod out of the way, put the fuel pump arm in there first to block off the pushrod from falling, then put in the pump and installed the 2 screws, i have no idea whats wrong.


pushrod is in there, gas comes out of the gas tank lines, well a little came out when i took them off the fuel pump

anything else?

roughskinjrz

oh also, i forgot that the pushrod could slide down, so i thought i did it wrong, and turned the motor over by hand a few times, is this bad for the pushrod while it was at the bottom? did it fall off or anything?

roughskinjrz

ok i went down again took off the fuel pump, to make sure that the pushrod was all the way up so i could put in the pushrod, i pushed it up put in the fuel pump, bolted it up again, hit the throttle on the carb for a couple minutes still nothing

i dont know why but i even cranked the motor of by hand a couple more times.

still no gas, what else could it be.

Lo-tec

empty gas tank...if not, try filling the bowls and running the motor. It will create a greater suction on the pump to get any air out of the lines and fuel to the engine. I don't think you can bolt the pump on if the pushrod is in the way.

roughskinjrz

alright, i will go get some gas and put some down the bowls and fire it up. the gas gauge shows its almost half full, it hasnt been wrong so far!

do you think no gas would get to the carb after pump for like 5 minutes, just because of air.


and what if it fires up on the gas i put down the bowls, but wont stay going because no fuel is coming to the carb? what else could it be?

Jetmeck

iTrader: (3)

I cannot believe no one has told the guy to change the fuel filter
FIRST, after all the fuel pump is only a month old. It could be bad but unlikely and if he has never changed the fuel filter that is the likely problem. If not put a new fuel pump on.

Lo-tec

roughskinjrz

yeah there is no fuel filter, unless there is one on the steel lines between the gas tank, and the fuel pump, but there was never a fuel filter between the fuel pump and carburetor, i heard there was one built into the carburetor, but the gas has not even reached there yet.

so i bought some gas i will try that in a bit.

what about my post above, about air can cause no gas going to the carb even if you pump for up to 5 minutes non stop?. and if it is not the air when i put gas in the bowls and turn the key, what else could it be?

roughskinjrz

ttt

roughskinjrz

well pouring gas down the carb, turned it over, nothing, we change the plugs around, still nothing, then i notice the wires that need to be plugged into the distributor arent. crank motor over. carb back fires, so i said ok turn the distributor 180 degrees. did that. when i put it back in plug in everything, i hit the throttle gas comes to the carb, YAY, fuel pump is working again. motor fired RIGHT UP

i love you Lo-Tech for all your help, haha.

just a couple minor problem, and most of it is the timing, after i have a couple clicking noises under the valve covers, im guessing another roller rocker issue. now, when i put them on i noticed the comp cam pro magnum 1.6's are VERY VERY close to eachother, infact almost touching, is this normal? im running TF twisted wedge heads.