Good new 
Fuel pump
Le Mans Master
Joined: Aug 2017
Posts: 8,336
Likes: 2,810
From: Cool Northern Michigan
So now, you are back to square one. Why no fuel at carb?
Its not the pushrod.
Its not the fuel supply line.
Its not the pushrod cam lobe.
Not sure on the pump.
Getting back to what Peterbuilt said earlier, do you have the preformed "S" hose installed at the pump inlet? When you tested the pump by hand pressure, that important "S" hose was not likely involved. But when you attached the pump to the block it is imperative that special hose is in place. Otherwise the fuel is pinched off.
Its not the pushrod.
Its not the fuel supply line.
Its not the pushrod cam lobe.
Not sure on the pump.
Getting back to what Peterbuilt said earlier, do you have the preformed "S" hose installed at the pump inlet? When you tested the pump by hand pressure, that important "S" hose was not likely involved. But when you attached the pump to the block it is imperative that special hose is in place. Otherwise the fuel is pinched off.
Le Mans Master
Joined: Jun 2006
Posts: 6,400
Likes: 1,226
From: Tampa Florida
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Safety Car
Joined: May 2004
Posts: 4,363
Likes: 1,588
From: los altos hills california
Some related comments:
We don't know why planet decided he needed to replace the fuel pump.
(OK, car doesn't start - this is new behavior? You didn't just get the car or something like that?)
We don't know if the supply side line is actually supplying gas
We don't know what 'no fuel to the carb' means (two filters are in the path). Are we looking for the accelerator pump to squirt?
Recommend planet that you supply the outlet side of the pump before the filters through a hose to a bucket and see if it pumps. There is actually a specification for how many gallons per some unit of time. I believe that is in the shop manual. BE CAREFUL!
Other
At idle, the pump needs a ridiculous little bit of travel - my car was still running until the cam lobe went almost completely round, so 1/2" is plenty for normal driving
HeadsUp: My cam supplier claimed that they improperly hardened the cam. On top of that I had just switched to Mobil 1 which I suspect was low on ZDP to begin with.
We don't know why planet decided he needed to replace the fuel pump.
(OK, car doesn't start - this is new behavior? You didn't just get the car or something like that?)
We don't know if the supply side line is actually supplying gas
We don't know what 'no fuel to the carb' means (two filters are in the path). Are we looking for the accelerator pump to squirt?
Recommend planet that you supply the outlet side of the pump before the filters through a hose to a bucket and see if it pumps. There is actually a specification for how many gallons per some unit of time. I believe that is in the shop manual. BE CAREFUL!
Other
At idle, the pump needs a ridiculous little bit of travel - my car was still running until the cam lobe went almost completely round, so 1/2" is plenty for normal driving
HeadsUp: My cam supplier claimed that they improperly hardened the cam. On top of that I had just switched to Mobil 1 which I suspect was low on ZDP to begin with.
Last edited by ignatz; Jul 5, 2019 at 08:19 PM.
Le Mans Master
Joined: Jun 2006
Posts: 6,400
Likes: 1,226
From: Tampa Florida
When you disconnected the fuel line to the fuel pump, did you get a good flow coming from the fuel tank?
OK, so you assumed it was a defective fuel pump....I would have too. Here is a similar situation where a guy replaced a fuel pump and his engine still wouldn't start. Turned out to be a defective sending unit....it must have been plugged up or dirty sock filter.
Just a thought.
https://gbodyforum.com/threads/fuel-...-no-gas.36081/
OK, so you assumed it was a defective fuel pump....I would have too. Here is a similar situation where a guy replaced a fuel pump and his engine still wouldn't start. Turned out to be a defective sending unit....it must have been plugged up or dirty sock filter.
Just a thought.
https://gbodyforum.com/threads/fuel-...-no-gas.36081/
Safety Car
Joined: Feb 2006
Posts: 4,142
Likes: 704
Safety Car
Joined: May 2004
Posts: 4,363
Likes: 1,588
From: los altos hills california
Yup. It's a Crower roller cam and all the other lobes were fine but this one. Lots of people explained to me why my switch to Mobil 1 wasn't the culprit. Obviously I changed the oil. And all that missing metal didn't seem to hurt the motor. The motor kept running OK right until it didn't. Steel pushrod was fine, but I switched to bronze or maybe some composite, I don't remember which.
Last edited by ignatz; Jul 6, 2019 at 03:52 PM.
Is my vette stock?? HAHA
Joined: Oct 2015
Posts: 20,209
Likes: 9,348
From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
The pump will not draw gas up to the pump easily with just cranking the motor if the fuel can is lower than the pump, you should hold the gas can you were using higher than the pump so that the pump is using less effort to pull the gas, if you are just checking flow you are going to have to turn the motor over for a while to get the fuel to be drawn through the pump and out. If you are trying to get it to the carb, then you need to prime the carb with a tiny amount of fuel to get it to fire which will get it spinning fast enough to draw fuel up to ithe carb.
If you are thinnking the sock is plugged, disconnect the fuel line at the pump, gas will pour out very quickly, if its just seeping put , then you have a clog in the pickup tube or sock
If you are thinnking the sock is plugged, disconnect the fuel line at the pump, gas will pour out very quickly, if its just seeping put , then you have a clog in the pickup tube or sock
Last edited by Rescue Rogers; Jul 6, 2019 at 04:05 PM.
Is my vette stock?? HAHA
Joined: Oct 2015
Posts: 20,209
Likes: 9,348
From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
That's for the choke it appears.that won't stop fuel flow. Itll just run rich
Is my vette stock?? HAHA
Joined: Oct 2015
Posts: 20,209
Likes: 9,348
From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
So you are saying that if yo uclose the choke it will run longer than 5 seconds? what about after the engine is warm, will it die again once the choke opens?
Is my vette stock?? HAHA
Joined: Oct 2015
Posts: 20,209
Likes: 9,348
From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
If thats the case then you may have the idle screws adjusted incorrectly or you have obstructions internal to the carb. Was it ever rebuilt?