Bogg around 1k-1200 rpm

[andrewbridges1]

My 40 shuts down for around 1/2 a second right when you hit the throttle. it does it every single time hot or cold. I will upload a video of it here soon. Carb is rebuilt, put in time, i dont think there are air leaks because i can spray around the carb and nothing changes. it has an electric fuel pump set around 8 psi. Thanks!

 

[andrewbridges1]

My 40 shuts down for around 1/2 a second right when you hit the throttle. it does it every single time hot or cold. I will upload a video of it here soon. Carb is rebuilt, put in time, i dont think there are air leaks because i can spray around the carb and nothing changes. it has an electric fuel pump set around 8 psi. Thanks!

its more of a stutter more than a bogg. Like a hiccup

 

[1911]

My 40 shuts down for around 1/2 a second right when you hit the throttle. it does it every single time hot or cold. I will upload a video of it here soon. Carb is rebuilt, put in time, i dont think there are air leaks because i can spray around the carb and nothing changes. it has an electric fuel pump set around 8 psi. Thanks!

Checked your ignition timing lately?

 

[charliemeyer007]

Accelerator pump linkage? Float level? The intake manifold gasket has a much larger surface area than the barb. Brake booster leaks.

 

[Grayscale]

Sounds like my experience running an undersized Weber. Or sounds like a vac leak. The stock carb fuel pressure should be between 3.4 and 4.8 psi.

 

[andrewbridges1]

Checked your ignition timing lately?

Yes I think it was 12 degrees or somthing like that

 

[andrewbridges1]

Sounds like my experience running an undersized Weber. Or sounds like a vac leak. The stock carb fuel pressure should be between 3.4 and 4.8 psi.

how do I check for a leak? It’s an original carb

 

[andrewbridges1]

Accelerator pump linkage? Float level? The intake manifold gasket has a much larger surface area than the barb. Brake booster leaks.

Has a brand new accelerator pump. How do I check the float level?

 

[charliemeyer007]

You failed to say what carb. Any way linkage is adjusted by bending the wire. Float level could be in a sight window, or you set it while the carb is apart.

 

[Grayscale]

A vacuum gauge, measuring intake manifold vacuum at idle, will be insight as to whether or not your motor has a vac leak.

 

[andrewbridges1]

You failed to say what carb. Any way linkage is adjusted by bending the wire. Float level could be in a sight window, or you set it while the carb is apart.

Sorry yes it’s I think a 72 carb. Which way does it sound like I need to bend the wire?

 

[Grayscale]

Fix the fuel pressure first, then check your float level.

 

[andrewbridges1]

Fix the fuel pressure first, then check your float level.

Should I just go back to the original pump?

 

[charliemeyer007]

Um I'm the physic person I know but I never learned to remote view.

I'm not saying you "need" to bend the wire, I saying you might need to bend the wire so that the pump squirts fuel when you step on the gas right away rather than later after the slop/play is taken up

I run a Rochester 2bbl because my rig came that way - the PO and I never liked the OEM carb. I think someone here has a nice vid on the carb maybe "pinhead". You could also see if there is a free manual besides the generic Haynes which will explain things like float level and accelerator pump linkage adjustment.

Land Cruiser Factory Service Manuals (FSMs)

Factory service manuals (FSMs) for your Toyota Land Cruiser ! From the 1950s to the present!

www.cruisercult.com

You should also make sure your valves are adjusted correctly. Timing/dwell is good. Not excessive play in the distributor shaft. All the contacts are clean - Inside the cap, scrape off the aluminium oxide layer

 

[vfrer]

I agree with Charlie... accelerator pump needs to be checked to make sure you are getting a good squirt. Should be able to see it if you look down the carb and push the pedal linkage. I had a bad one and it had that stumble.

 

[Pighead]

Sorry yes it’s I think a 72 carb.

Read the FAQs on carb dates to find out for sure. Read the FAQs on finding a vacuum leak and where the porthole window is.
Can you post pics?
I might try advancing the timing a bit (like another 5*) and see if that helps. If it does, advance it a little more.

 

[andrewbridges1]

Read the FAQs on carb dates to find out for sure. Read the FAQs on finding a vacuum leak and where the porthole window is.
Can you post pics?
I might try advancing the timing a bit (like another 5*) and see if that helps. If it does, advance it a little more.

I don’t know how to upload a video here so here it is as a YouTube short

 

[andrewbridges1]

its more of a stutter more than a bogg. Like a hiccup