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Back fire into carb

When car is idling or riding back fire through carb

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I have a390 ford engine that back fires while idling it has a breaker point ignition what could be wrong

Check this video for idle speed adjustment. Backfiring can be caused by incorrect mixing in the carburettor or bad timing settings.

Check this link for backfire issues:

. What would cause Ford 390 to backfire through carb Yahoo Answers

Setting Curb Idle Speed of Carburetor Video Holley Carb DVD

Feb 12, 2015 | Ford Cars & Trucks

1 Answer

Fuel injection problem

carb needs cleaning, you may have a air leak. spark plugs being fouled up , and might even have timing out. there is 2 jets or more in the carb if there is a problem it can weaken fuel having choke on can give it more air and fuel. depending on model of engine. on fuel in line there will be a filter, very small these can get damaged and let sludge from the tank in. clean out the carb remove it and open it up clean out and you will see brass like screws blow them out with an air line, refit with new seals, you can make them if they not available. or you a sealer thats for fuel.. air lines you can spray them while engine is running and if engine pitch changes that can be were the air leak is.

May 28, 2017 | Cars & Trucks

1 Answer

How to fix back fire in my carb 1985 jeep cherokee

several things to check for this one....since its happening under a load.

- timing
- ignition (spark plugs, distributor, cap/rotor)
- Idle controller
- exhaust system

Feb 01, 2012 | 1985 Jeep Cherokee

1 Answer

Why does my 03 holden rodeo back fires & misfires under load, i have replaced sparkplugs but still slugish?

It sounds like your engine needs a tune up, the timing may be off and the carb may need adjusting to get the fuel mixture correct.

Dec 27, 2011 | Isuzu Rodeo Cars & Trucks

1 Answer

Looking for info on how to adjust the fuel mixture and Idle on a 1969 Corvette 427 400 HP Tri-power 3x2 carburetor.

That engine runs at low speed, starts and idles on the center carb only. first make sure the carbs are synchronized so the front and rear ones are fully closed at idle, then adjust idle speed and mixture on the center carb. Sweet ride by the way, if you get tired of working on it and want to get rid of it I will take it. LOL

Feb 22, 2010 | 1965 Chevrolet Corvette

1 Answer

How do i tune a edelbrock 650 carb on a 350

have a shop check the tension on the choke settings in the morning before car is started,and reset fast idle on choke settings,then when car is run and heated up it will trip off the choke settings and fast idle and return back to normal settings

Nov 22, 2009 | Chevrolet Nova Cars & Trucks

1 Answer

My 1986 F 350 with a 350 4 barrel carb back fires

check the vacume lines keep me posted

Sep 13, 2009 | 1986 Ford F 250

1 Answer

2002 nissan 2753cc 6cyl firing order.

Carb.basic setting.
On the Carb to Intake manifold there is an AIR/FUEL volume control screw. Gently screw it in Clockwise until it bottoms out, then back it out 2 turns.
Next, find the Throttle Butterfly Fast/ Slow idling screw, and back it out until the Throttle linkage is released.
Then slowly wind it back in 2 turns
If you have SPARK and FUEL up, then it should Fire Up.
When it does, using the Air/Fuel screw to stabilise the idle mixture, adjust the Idling Speed Screw to run balanced at around 750 RPM.
All the best and Regards, DT

Aug 29, 2009 | Nissan Minivan Cars & Trucks

2 Answers

Car wants to die at idle and slow rpm speeds

Got a quadrajunk carb on there? If so, unscrew the needle valves in the front of the baseplate and spray carb cleaner into the ports. Put them back in and turn out about two turns each. adjust back and forth to get the highest vacuum reading, then use a tach to get the best steady idle.Do this with the advance disconnected and plugged, adjust final idle speed with linkage adjustment.

May 23, 2009 | 1979 Pontiac Firebird

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