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Hesitation #1331818 Tue Oct 29 2019 10:15 PM
Joined: Oct 2019
Posts: 75
T
Tony292 Offline OP
Shop Shark
So my new to me 40 1.5 ton runs great but has a huge bog/hesitation that happens every time I shift. I have to wind the **** out of it and then double clutch, shift and then go light on the gas pedal otherwise it will bog down severely. It makes driving a pain in the ****. Has the carter W1 on it but no way to tell if it’s been rebuilt or not.


Advice? [img]https://www.stovebolt.com/ubbthread...A40B7E28-CBD9-4567-B9E0-D89E2B958F5C.png[/img]

Re: Hesitation [Re: Tony292] #1331836 Wed Oct 30 2019 12:55 AM
Joined: Sep 2009
Posts: 219
G
Green_98 Offline
Shop Shark
Check to see if the choke flap is perhaps closed.


-Patrick
1953 Chevrolet 3100
261 / 4-speed / 4:11 / Commercial Red

Re: Hesitation [Re: Tony292] #1331840 Wed Oct 30 2019 01:13 AM
Joined: Mar 2010
Posts: 8,641
5
52Carl Offline
Master Gabster
Have you done a tuneup on it since you got it? I would start there.
Start by removing the spark plugs. They will tell you a lot.
Do not do anything to the carburetor until you have made sure that everything else which makes an engine work right has been checked.
"It is never the carburetor." Say that 3 times like you mean it. It will save you a lot of tail chasing if you were to start digging into the carburetor before you have checked everything else.
If it ends up being the carburetor, at that time, you will only be fixing one problem instead of multiple problems.

Re: Hesitation [Re: Tony292] #1334109 Sun Nov 17 2019 07:23 PM
Joined: Apr 2005
Posts: 1,979
B
Builder Offline
Shop Shark
I agree with 52carl. I got a truck out of a 27 year sleep. I just cleaned the outside of the carb and stuck it on. With only idle adjustments I drove it 900 miles home. It is still on the truck and not been taken apart.

Re: Hesitation [Re: Tony292] #1334110 Sun Nov 17 2019 07:25 PM
Joined: Aug 2005
Posts: 8,761
Tiny Offline
Global Mod
I remember that journey and a short stop in Kansas.


Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.
Re: Hesitation [Re: Tony292] #1334123 Sun Nov 17 2019 08:37 PM
Joined: Apr 2005
Posts: 7,879
Justhorsenround Offline
Grease Monkey, Moderator General Truck Talk & Greasy Spoon
As do I and Terry B for the short pit stop in El Reno, Okla.


Martin
'62 Chevy C-10 Stepside Shortbed (Restomod in progress)
'47 Chevy 3100 5 Window (long term project)
‘65 Chevy Biscayne 4dr 230 I-6 one owner (I’m #2)
‘39 Dodge Businessmans Coupe


"I fought the law and the law won" now I are a retired one!
Support those brave men/women who stand the "Thin Blue Line" and lock up those on the wrong side of that line.

Re: Hesitation [Re: Tony292] #1334151 Mon Nov 18 2019 01:20 AM
Joined: Jul 2014
Posts: 139
1
1Ton_tommy Offline
Shop Shark
This hesitation could also be retarded ignition timing or a leaking vacuum advance unit. In which case it would have a tendency to pop back thru the carb when cold. It could also be a vacuum leak associated with the brake booster hose that might be rotted and leaking or the hydrovac itself. Of course there are many possible sources of vacuum leaks including warped intake manifold, the vacuum booster for the wipers if so equipped, the governor if so equipped, are a few that come to mind.


51 3800 PU, 55 235 (w/cam, headers, 2 carbs, MSD ign.), SM420 & Brown-Lipe 6231A 3spd aux. trans, stock axles & brakes. Owned since 1971.
Re: Hesitation [Re: Tony292] #1334174 Mon Nov 18 2019 03:57 AM
Joined: Nov 2002
Posts: 1,902
C
carbking Offline
Carburetion specialist
I really dislike the use of the words "always" or "never"; so I won't use either wink

But my guess is that, given the symptom you have posted, the probability that this symptom is being caused by the carburetor is lower than your probability of winning an argument with the IRS.

I would first look at the advance mechanism of the distributor. And as mentioned by others, there are other possibilities.

Jon.


Good carburetion is fuelish hot air
The most expensive carburetor is the wrong one you attempt to modify
If you truly believe "one size fits all" try walking a mile in your spouse's shoes!
[image]http://www.thecarburetorshop.com/Avatar.jpg[/image]
Re: Hesitation [Re: Tony292] #1334434 Wed Nov 20 2019 04:31 AM
Joined: Mar 2010
Posts: 8,641
5
52Carl Offline
Master Gabster
Maybe so, Jon, except it is "Never the carbretor"........ smile smile smile
Carl

Re: Hesitation [Re: Tony292] #1334458 Wed Nov 20 2019 01:27 PM
Joined: Nov 2002
Posts: 1,902
C
carbking Offline
Carburetion specialist
Cart - for many years I have contended that the ancient updraft carburetors were much more reliable than modern downdraft carburetors!

WHY?

Since the updraft required significantly more work to remove, the actual "carburetor problem" would be diagnosed and fixed BEFORE trying to remove the carburetor! wink

But your "Never the carburetor" is going to put me out of business! wink wink wink

Jon.

Last edited by carbking; Wed Nov 20 2019 01:27 PM.

Good carburetion is fuelish hot air
The most expensive carburetor is the wrong one you attempt to modify
If you truly believe "one size fits all" try walking a mile in your spouse's shoes!
[image]http://www.thecarburetorshop.com/Avatar.jpg[/image]
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