It's just weird that I SEE the gas squirt and thought "how can the accelerator pump be bad if it Squirts?
![Thinking :thinking](./images/smilies/icon_think.gif)
Nicely condensed diagnostic routine.martincom wrote: ↑Sun Sep 04, 2022 9:17 pmA vacuum leak around the throttle shaft will really impact idle. It'll be rough and you'll have the idle mixture screws opened well beyond the normal amount of turns. If you have power brakes and the booster was leaking, pinching off the hose to it will change the idle speed/smoothness. You can check the PCV valve by pinching off the hose to it. The idle speed will drop around 50 - 100 RPM when the hose is pinched off on a properly functioning PCV valve. You can spray brake cleaner or some other aerosol that is mildly combustible around the carb base and intake passages to check for leaks, while running. You'll hear the idle change if there is a leak when it draws the aerosol in.
The taper is likely due to die casting. One would have a heck of a time getting the part out of the mold without it, the shrinkage of aluminum alloy as it cools being what it is.
Hmmm.... that makes sense!!Wildergarten wrote: ↑Mon Sep 05, 2022 7:38 pmThe taper is likely due to die casting. One would have a heck of a time getting the part out of the mold without it, the shrinkage of aluminum alloy as it cools being what it is.
You may be right John! I think it needs a double BOOSTER shot (of gas)!
So if all else fails, I would need to remove the intake and clean it out. No way of doing that "on the truck", right? I've never had that issue before, that's why I ask.nutz wrote: ↑Tue Sep 06, 2022 7:39 pmyes heat riser in one exhaust manifold is used to heat the intake manifold rite after the choke comes off
had a 69 dart 273 had a horrible hesitation ,tried timing ,carb ect. never figured it out ,sold the car to a friend and had to reseal the intake
found clogged crossover ,cleaned it out and never ran so good ,the clue for me was it didn't seem to hesitate when cold
if you look down the carb and have a steady stream of gas when you open the throttle accelerator pump should be fine
but if it doesn't vaporize when it hits the intake it will puddle up and hesitate
seems like 4bbl cars seems to spray more of a mist so aren't effected as much
I'll put my finger on the intake... but I'm holding YOU responsible for burns! HAHA! After some searching I've read where some guys block them off.martincom wrote: ↑Wed Sep 07, 2022 3:34 pmIt is simple to determine if the exhaust crossover is plugged. With the engine at full operating temperature, you won't be able to hold your finger tip on the crossover. If you can, it is plugged.
Yes, it is a remove intake repair.
From your symptoms, I doubt this is your issue.
PwrWgnDrvr wrote: ↑Wed Sep 07, 2022 5:14 pmLooking down the carb while running can be really bad if it backfires. Burned face, eyes, etc. Lucky if it only takes eyebrows and hair. Especially dangerous when you're pumping the throttle to diagnose problems. If you must, wear a full face shield.
Drops of oil on the leather will be dissolved instantly in the gas.