rebuilt carb, no squirt!

[chrisb9259]

i tore apart my 4160 holley carb. changed the gaskets clean all the junk out and put it back together. my 72 c10 that would start until you pressed the gas and then shut off NOW starts only when i keep gas on it until it floods. there is no squirt from the nozzle into the throat. i checked the bowl and it has gas. and when i rebuilt carb i made sure needle and seat functioned. so whats up? any help with this would be greatly appreciated.

[demian5]

Sounds like you got the accell pump arm on wrong or the pump parts were not addressed/installed incorrectly.

[chrisb9259]

oh i forgot to mention that. i replaced the acel pump diaphragm. is there a way to know if i have the arm wrong? it looks right. its under the throttle linkage... i think thats what its called. (screw with spring) also replaced the red seal under accel pump spring

[demian5]

Originally Posted by chrisb9259

oh i forgot to mention that. i replaced the acel pump diaphragm. is there a way to know if i have the arm wrong? it looks right. its under the throttle linkage... i think thats what its called. (screw with spring) also replaced the red seal under accel pump spring

When you pump the throttle, gas should squirt out, if not, pull the carb back apart...

[chrisb9259]

what should i check when i pull it back apart?

[KJSR]

There is a feed passage as well as a discharge passage. They both need to be clear. Also there is a check ball in one of those passages that can get stuck. Check the squirter and make sure its not clogged.

[KJSR]

https://www.google.com/url?sa=i&sour...60889191723968


Try this link......

[chrisb9259]

thank you for all the help. i took the front bowl off and turned it toward me to check the pump.... s[lash right in the face. that works. lol i blew compressed air through the metering block. no stop there. so im assuming there is a block in the main body. so my question is.... is that enough to getting the engine from running? i have to keep the gas pedal pressed to keep it running for the 30 seconds it does. if i let off the gas at all its dead as a door nail.

[KJSR]

The accelerator pump has nothing to do with the idle circuit. You may have more issues.

[KJSR]

Also check if the fuel is dumping out the overflow tube.

[chrisb9259]

nothing coming out of the overflow tubes and still nothing coming out of the squirt nozzle. i started looking into idle circuits more and i will try the secondary screw on the bottom of the carb as well.

[chrisb9259]

I will update tomorrow. Is there anything else I should check?

[SmirchIs#1]

Originally Posted by chrisb9259

i tore apart my 4160 holley carb. changed the gaskets clean all the junk out and put it back together. my 72 c10 that would start until you pressed the gas and then shut off NOW starts only when i keep gas on it until it floods. there is no squirt from the nozzle into the throat. i checked the bowl and it has gas. and when i rebuilt carb i made sure needle and seat functioned. so whats up? any help with this would be greatly appreciated.

It sounds to me like you may have the wrong gasket between the metering block & carb body.There are 2 diff. styles.The accelerator pump passage passes through the well where there is intake manifold vacuum to act on the power valve.One style uses a brass tube w/"O" rings,which would be hard to miss.The other is sealed by the gasket itself.When the wrong gasket is used you are sucking fuel out of the bowl via pump passage and directly into the intake,plus the power valve is not closed at idle as it should be.I'm for some reason not able to put pics on this site.It's unfortunate because a few pics would be worth that thousand words.

[chrisb9259]

thanks in advance. i will look for the pictures. and i will keep you updated. it would be nice its that the bulk of my problems

[chrisb9259]

So I found a problem. The needle under the discharge nozzle was stuck. And changed the gasket between metering block and carb body. She runs better while pressing the gas but still dies if I let go of the gas pedal. Do you think it could be a vacuum leak?