As long as the choke is on, it will prevent the secondarys from opening. Since fuel is heavier than air, it takes longer to get it to move. The air valves on the secondarys act as a choke, while the metering rods are attached to the secondary throttle plates. When you stomp it, the metering rods raise first, while the air valves prevent the immediate rush of air, thereby creating the effect of immediate response. If you experience a major hesitation, your issue will most likely be 1) the accelerator pump itself is bad or incorrectly adjusted, 2) Someone has removed the lock-out for the choke, 3) Float level is too low or 4) the air valve spring is too loose. Also, on the secondary metering rods, find a pair that has a small slot cut in them. They allow fuel to pass sooner than the standard rods. Adding more tension to the air valve spring will prevent the air valves from opening so quickly.
Beautiful 3 door, all 67-72 burbans are 3 door only I've never seen a factory 4 door version but this one is Hella sweet and has the rear hatch which makes her better, she needs an LS swap and that looks like a 402
Beautiful truck, one of the better GM designs. And fairly easy to work on, with the 6-cylinder and small block V-8 you could crawl into the engine bay to work on it.
and you could fix it in less than a min with a pocket knife , one of the best carbs ever made , but gets a bad name because not one person knows how to tune one lol
As long as the choke is on, it will prevent the secondarys from opening. Since fuel is heavier than air, it takes longer to get it to move. The air valves on the secondarys act as a choke, while the metering rods are attached to the secondary throttle plates. When you stomp it, the metering rods raise first, while the air valves prevent the immediate rush of air, thereby creating the effect of immediate response. If you experience a major hesitation, your issue will most likely be 1) the accelerator pump itself is bad or incorrectly adjusted, 2) Someone has removed the lock-out for the choke, 3) Float level is too low or 4) the air valve spring is too loose. Also, on the secondary metering rods, find a pair that has a small slot cut in them. They allow fuel to pass sooner than the standard rods. Adding more tension to the air valve spring will prevent the air valves from opening so quickly.
What happen to that white stepside GMC you pressure washed in a video?
Beautiful 3 door, all 67-72 burbans are 3 door only I've never seen a factory 4 door version but this one is Hella sweet and has the rear hatch which makes her better, she needs an LS swap and that looks like a 402
Beautiful truck, one of the better GM designs. And fairly easy to work on, with the 6-cylinder and small block V-8 you could crawl into the engine bay to work on it.
That is a beautiful Suburban.
Agreed, love that styling
Great job on the dash. Perfect camp wagon.
I have been enjoying your videos. Do you only film in cold weather?
greetings from eastern wa, had to subscribe once i watched couple of your videos
en.wikipedia.org/wiki/Chevrolet_Suburban
My '72 Caprice had a 400 engine when it was new, but that was a small-block
this was marketed as a 396 in cars...
@@JoeHynes284
396 was available in `72?
Dash looks awesome
They stayed the same through 72 when they changed the body in 73 they added the 4th door
i was told repairmen used three doors but the vans became more popular
Quadrajets were notorious for bogging down when the secondarys opened
and you could fix it in less than a min with a pocket knife , one of the best carbs ever made , but gets a bad name because not one person knows how to tune one lol
Nice ride but those wheels look ghetto.
Should have been a longer drive.
Any classic mini's
Might be a big block 402.
right, but they were marketed as 396s in cars and 400s in trucks
In the '71 Chevy Caprice, the 402 was marketed as a 400.
@@JoeHynes284
1970-1975 Pontiac Firebirds (card) were marketing Formula 400s
That's my kind of subaru on that flat bed.
We ran an '83 1800 GLF wagon for years, terrific car. Rust killed it but it still drove perfectly to the scrapyard in '99.
Qudrapuke.
2:37 give it a black paint job and you've got a retro hearse