JohnnyMaryjo Posted August 3, 2022 Share Posted August 3, 2022 why is it when I step on the gas full throttle the motor chokes out like it is asking for gas or drowning in it but at normal rpm like around 2500 - 3000 the motor runs fine we have done almost everything from new carb. all new wiring, reconditioned motor ,voltage , distributor, and on and on? what else is there ? Link to comment Share on other sites More sharing options...
Ben Bruce aka First Born Posted August 3, 2022 Share Posted August 3, 2022 " Asking for gas"! I like that. And my bet is that it is doing so. What happens if the throttle is opened slowly to wide open? Ben 1 Link to comment Share on other sites More sharing options...
EmTee Posted August 3, 2022 Share Posted August 3, 2022 How do the ignition points look? What is the dwell angle? Link to comment Share on other sites More sharing options...
carbking Posted August 3, 2022 Share Posted August 3, 2022 "New" everything is bothersome. Have you tested ignition to see if the dwell and timing are correct at idle? Is the advance mechanism on the distributor functioning? Have you tested the carburetor accelerator pump? "New", especially today, generally means shiny, not necessarily good. With no testing reported, first GUESSES are either advance mechanism isn't, or the accelerator pump isn't. Jon 3 Link to comment Share on other sites More sharing options...
JohnnyMaryjo Posted August 3, 2022 Author Share Posted August 3, 2022 thank you all I will have to ask my mech. if this is everything he has done ? anything else ? thanks Johnny Link to comment Share on other sites More sharing options...
JohnnyMaryjo Posted August 3, 2022 Author Share Posted August 3, 2022 Hello when I give the car some gas it goes great but when I ask it for all of it it will sputter , spit, chock and I have to let off the gas and drive it where it will accept the normal why is this .it was running great until this mech. was going to mess with the carb. cause it was running to rich and black smoke out the pipe. from he touching it .It never ran right again.I asked him what he did he said he just placed different jets in the carb. I told him to place it back the way it was I can handle black smoke . but he moved on and passed never did finish this What Mech can take this 1 bar. carter carb and make it correct. Who do we trust thanks Johnny Link to comment Share on other sites More sharing options...
plymouthcranbrook Posted August 3, 2022 Share Posted August 3, 2022 Not knowing where you are limits us in suggesting someone. That said Then and Now Automotive in Weymouth, Ma. Rebuilt a B&B single barrel for me several years ago and it worked well for a long time. Link to comment Share on other sites More sharing options...
LARRYCAROL Posted August 3, 2022 Share Posted August 3, 2022 Have you tried running without the air filter? Early filters had felt that can come loose and choke out engine under load. Link to comment Share on other sites More sharing options...
DFeeney Posted August 4, 2022 Share Posted August 4, 2022 Could the rubber flex line at the fuel pump be compromised and restricted by the new gasoline and not delivering full flow. 2 Link to comment Share on other sites More sharing options...
EmTee Posted August 4, 2022 Share Posted August 4, 2022 Has the fuel pump been tested for pressure AND volume? 1 Link to comment Share on other sites More sharing options...
keithb7 Posted August 4, 2022 Share Posted August 4, 2022 (edited) " I will have to ask my mech. if this is everything he has done?" This statement raises my eyebrows. Good troubleshooting means understanding what it's supposed to do and why. I hope he gets it sorted out. -Test distributor vacuum advance -Check ignition timing -Set dwell -Plugs clean? -Check carb for air leaks. Float setting. -Remove air filter, engine turned off. Look down into carb air horn. Cycle throttle by hand. Is a raw stream fuel being shot-in when throttle is opened quickly? It should be. -With engine running, air filter off. Rev up engine quickly. Have a mustard squirter bottle of fuel ready. When engine stalls out, squirt a little raw fuel in carb yourself by hand. Better? Worse? -Engine running. Cycle the choke closed a bit to cut off air supply slightly. Not all the way to cause the engine to stall. Quickly rev up engine. Better? Worse? That'll help you get closer to the problem. Edited August 4, 2022 by keithb7 (see edit history) 3 1 Link to comment Share on other sites More sharing options...
keithb7 Posted August 4, 2022 Share Posted August 4, 2022 1 Link to comment Share on other sites More sharing options...
JohnnyMaryjo Posted August 4, 2022 Author Share Posted August 4, 2022 14 hours ago, keithb7 said: " I will have to ask my mech. if this is everything he has done?" This statement raises my eyebrows. Good troubleshooting means understanding what it's supposed to do and why. I hope he gets it sorted out. -Test distributor vacuum advance -Check ignition timing -Set dwell -Plugs clean? -Check carb for air leaks. Float setting. -Remove air filter, engine turned off. Look down into carb air horn. Cycle throttle by hand. Is a raw stream fuel being shot-in when throttle is opened quickly? It should be. -With engine running, air filter off. Rev up engine quickly. Have a mustard squirter bottle of fuel ready. When engine stalls out, squirt a little raw fuel in carb yourself by hand. Better? Worse? -Engine running. Cycle the choke closed a bit to cut off air supply slightly. Not all the way to cause the engine to stall. Quickly rev up engine. Better? Worse? That'll help you get closer to the problem. thank you tried all of it no change in the way it is acting ran the same with all you tld me to do Link to comment Share on other sites More sharing options...
JohnnyMaryjo Posted August 4, 2022 Author Share Posted August 4, 2022 15 hours ago, EmTee said: Has the fuel pump been tested for pressure AND volume? we replaced 3 of them Link to comment Share on other sites More sharing options...
JohnnyMaryjo Posted August 4, 2022 Author Share Posted August 4, 2022 Just now, JohnnyMaryjo said: thank you tried all of it no change in the way it is acting ran the same with all you tld me to do 15 hours ago, EmTee said: Has the fuel pump been tested for pressure AND volume? replaced 3 of them good better best Link to comment Share on other sites More sharing options...
JohnnyMaryjo Posted August 4, 2022 Author Share Posted August 4, 2022 On 8/3/2022 at 8:10 AM, Ben Bruce aka First Born said: " Asking for gas"! I like that. And my bet is that it is doing so. What happens if the throttle is opened slowly to wide open? Ben same no difference Link to comment Share on other sites More sharing options...
JohnnyMaryjo Posted August 4, 2022 Author Share Posted August 4, 2022 15 hours ago, DFeeney said: Could the rubber flex line at the fuel pump be compromised and restricted by the new gasoline and not delivering full flow. no but thank you Link to comment Share on other sites More sharing options...
JohnnyMaryjo Posted August 4, 2022 Author Share Posted August 4, 2022 On 8/3/2022 at 8:10 AM, Ben Bruce aka First Born said: " Asking for gas"! I like that. And my bet is that it is doing so. What happens if the throttle is opened slowly to wide open? Ben chokes out wants to stop the moter from going until I let up on the gas peddle then it will continue to run Link to comment Share on other sites More sharing options...
JohnnyMaryjo Posted August 4, 2022 Author Share Posted August 4, 2022 21 hours ago, plymouthcranbrook said: Not knowing where you are limits us in suggesting someone. That said Then and Now Automotive in Weymouth, Ma. Rebuilt a B&B single barrel for me several years ago and it worked well for a long time. do you have a ph # or e mail for them or web site thanks Johnny Link to comment Share on other sites More sharing options...
Joe Cocuzza Posted August 4, 2022 Share Posted August 4, 2022 https://www.then-now-auto.com/fuel-pumps/ 1 Link to comment Share on other sites More sharing options...
plymouthcranbrook Posted August 4, 2022 Share Posted August 4, 2022 5 hours ago, JohnnyMaryjo said: chokes out wants to stop the moter from going until I let up on the gas peddle then it will continue to run That sure sounds like either a vacuum leak or a bad accelerator pump. Link to comment Share on other sites More sharing options...
Oldtech Posted August 5, 2022 Share Posted August 5, 2022 I want to say it's the carb. these have a metering rod as I remember and if they changed the jet, could have adjusted the rod incorrectly or whatever. Even broke the tip off the rod, You need some one that understands carbs to take a look at it. Link to comment Share on other sites More sharing options...
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