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Frank S Fitch Posted on Oct 29, 2018
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I have 413 dodge with a 600cfm holley carb. It is stalling on deceleration .It was rebuilt by the previous owner. I am thinking possible air leak at gasket under the carb?

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80stech

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  • Expert 120 Answers
  • Posted on Oct 30, 2018
80stech
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Probably not. Any air leak under the carburetor would cause a problem with the engine idling not just on decel.

5 Related Answers

Anonymous

  • 120 Answers
  • Posted on Aug 16, 2008

SOURCE: Holley carb leaks gas regularly

the float may be stuck whitch means a car rebuild

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Anonymous

  • 147 Answers
  • Posted on Mar 29, 2009

SOURCE: Mass air flow sensor on a 1995 dodge stratus is located where?

Try to unplug maf sensor and try to start and run. ECM will go to default values. I vehicle starts and runs with sensor discoed then that is the problem. Make sure all connections for air induction between maf an intake are tight and there are no leaks. Air leaks after maf sensor will cause runability issues.

Anonymous

  • 118 Answers
  • Posted on Dec 04, 2009

SOURCE: Old chevy 235 six cylinder, when cold it falls on its face

Question, does it stall, or bog? A few things come to mind. You say the carb. is new, what is the cfm of the carb.? Could be too much carb. for the cam. It could be a problem with the accl. pump on the carb. dumping too much fuel on take off. Have you checked the fuel pressure at the carb. also? You say you checked the timing and vac. advance, but is the timing set high enough? Usually this is a sign of too much fuel being dumped. If you have the chance, try another carb. Let me know.

baugh55grfmj

Mitchell Baughman

  • 225 Answers
  • Posted on Feb 09, 2010

SOURCE: 88 dodge ram le 150 318 carburated

Yes the rear seal on the rearend would cause a leak and would have to be pressed in.

Anonymous

  • 5 Answers
  • Posted on Feb 27, 2010

SOURCE: i have a 1981 dodge ram 150 pick up that will not

you need to replace the fuel filter.

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Why does a carbureted motor run fine at cruising speeds, and cold starts but at warm idles and coming to a stop sometimes shuts off and idle surges?

Maybe float level is low. If possible split top off carb to observe wet level inside carb. Thinking 2 things for deceleration that changes pressure in fuel line is volume push by fuel towards front components and maybe Evaporative Emissions is getting solid fuel instead of vapors from splash.

Idle dashpot is part on some early carbs to allow throttle gradual closing. Some are vacuum controlled with what is called a "vacuum tree" which routes the vacuum to the dashpot by temperature. Vacuum tree could have wrong hose routing or THERMOSTAT for engine could be too cold.
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Carb. problem replace options ?

Rebuild it yourself with a carb rebuild kit

Buy it rebuilt and just install it

Or buy a new aftermarket holley or edelbrock.
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Old chevy 235 six cylinder, when cold it falls on its face

Question, does it stall, or bog? A few things come to mind. You say the carb. is new, what is the cfm of the carb.? Could be too much carb. for the cam. It could be a problem with the accl. pump on the carb. dumping too much fuel on take off. Have you checked the fuel pressure at the carb. also? You say you checked the timing and vac. advance, but is the timing set high enough? Usually this is a sign of too much fuel being dumped. If you have the chance, try another carb. Let me know.
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383 Stoker Chevy dies when I put it in gear

That converter should make stalling less of an issue, not more. (stall speed is higher than stock) Make sure that you have the cam degreed in properly, that you have the timing set properly (I'd use 8-12 degrees to begin) and make sure that you have no vacuum leaks.
With a stock converter, you shouldn't use any cam with more than 220 degrees duration...With the higher stall converter, you may get a few more degrees leeway. Also, the carb is too small for the application...should have at least a 750 dbl pumper or larger on there depending largely upon the car weight, gearing and what you have as far as intake and exhaust. (header diameter, length and design)...This should have been all figured out on paper before spending a dime for parts...Biggest mistake I see is people putting "mis-matched" parts together and expecting it to work (everything needs to compliment everything else)
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My 88 raider did the same thing. As long as I had my foot on the gas pedal it would run but if I lifted off the gas it would die. It ended up being a vacuum line. I can't remember which one (possibly the AAP) but not sure. I did replace the AAP diaphragm and all of my vacuum lines.
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Need fuel/air settings for 4150 holley 600cfm. from seat.

Depends where the timing is set and you really just have to play with them until you get the rigght settings
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88 dodge ram le 150 318 carburated

Yes the rear seal on the rearend would cause a leak and would have to be pressed in.
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