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Carburetor setting I start the engine runs fine then it starts spluttering over fuelling that I even get fuel coming out the one exhaust. what can I do?

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  • Cars & Trucks Master
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Check the float levels. If it is a holley check the power valve for a power valve diaphragm failure. (they burn from back firing) Check fuel pump pressure. replace the needle and seat assy. tighten the seat in the body properly using a fibre washer.

Posted on Apr 22, 2013

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6 Suggested Answers

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Posted on Jan 02, 2017

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  • 21 Answers

SOURCE: truck runs rough

Sounds like one of your chambers isn't firing. Run your car for a few minutes, shut it off then pull your plugs one at a time and see if one of them is wet. Might just need a new plug.

Posted on Nov 28, 2008

Bloomingidoi
  • 49 Answers

SOURCE: engine misfiring/fuel coming out exhaust

Sounds like you may need to inspect and replace your fuel line from front to rear. no other reason for your problem.

Posted on Nov 29, 2008

dgjtex
  • 405 Answers

SOURCE: new carburetor installed on 79 el camino

I am familiar with these, a manual choke carb works off of a bimetal coil in the manifold exhaust crossover on the passenger side of the intake, Make sure it is hooked up, then while the car is cold, on the rockchester carbs, use an 1/8 in drillbit to set choke. You have to loosen the three screws on the choke to set, when the choke flap, the very top one on the carb touches the drillbit, set it there and lock down screws, pump once or twice and it should start and idle, as the bimetal coil heats up it should open the top flap. if you try to accelerate before it is wam it will disconnect from the auto choke. I hope this helps if not please do not rate me at all, if it does help you fix your problem then please give me a fixya,

Posted on Dec 22, 2008

Ray190te
  • 61 Answers

SOURCE: daewoo cielo 1997 spluttering @ startup

Try to reset the IAC valve on the throttle body it has 4 wires t it .
procedure is as follows

turn ignition key on (don't start the engine), unplug the IAC valve, turn the key off, replug the IAC .Do this 3-4 times .Then start the engine while holding the pedal down at about 2000 rpm then let the rpm down slowly till idle. Sometimes the throttle requires cleaning then redo the reset.

Posted on Jan 19, 2009

alicantecoli
  • 22219 Answers

SOURCE: Bosch edc 5.3 fitted to MAN D2876 lf02 engine

try blocking off the valve that connects the inlet manifold to the exhaust and see what happens ??? or just disconnect it from the inlet manifold and try that before you remove the pump to have it overhauled ,Yes we do seem a bit short of motor vehicle categorys if not a yank it doesnt exist ,and as for the spelling¿¿¿¿ DA??? pigs tails??? fire wires??looks like we will have to re invade the colonys and teach them proper queens english .The only problem with that is and thats all the english have left the UK ,Its now a third world muslim country .Anyway best of british with it ---from spain

Posted on Sep 12, 2009

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2 Answers

OK I have a 1976 Chevy C20 with a 350 and I am getting popping through the carb can anyone tell me what could be the problem thank you in advance


Most certainly not a problem I have come across but I would start with the spark plugs wires and distributor cap. There is back up pressure coming out on you as you know but seems that there is a late spark or none at all.

Apr 05, 2016 | Cars & Trucks

1 Answer

I got my carburetor problem fixed but now it runs for a while then starts backfiring it'll shut off let's set for a couple seconds and start right back up can anybody tell me why


That sounds like a fuel/air mixture problem.

Just to confirm .. it is a carburettor, not fuel injection?

As a general rule of thumb (with carburettors..) if it backfires through the exhaust/muffler .. the fuel mixture is too rich.

If it backfires through the carb/air filter, the mixture is too weak.

It could also be a 'sticking' float in the carb.

When an engine is cold the fuel is rich .. lots of fuel .. that's how a choke works.. However, when the engine warms up a rich mixture causes problems. The car may splutter and stall, run sluggish or cut out.

Dec 25, 2015 | Cars & Trucks

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1999 blazer only starts when primed and then wont start after sitting


Black smoke is usually extra fuel, but you say you are priming it to start so that could be why.
Have you checked fuel pump pressure before and after cranking ?

Mar 04, 2013 | 1996 Chevrolet Blazer

1 Answer

I have corona st 171,the engine can start and then stop


The poor performance of the car makes these faults to come up and undermine the working of the engine. So to start off we need to check from the fuel tank. Check if the fuel contains impurities and specially water. If so this can come up with the pumping when the tank gets empty and produce misfiring, splutter and jerks. So a check on the fuel filter will confirm this as it will be seen, if so remove and clean tank and change the filter. We then come to the fuel pump/carburetor as the fuel mixing and pressure is determined in this section. You need to have the pump calibrated if the pressure at the injector is low.

If the car has starting problems then check these tips:

http://www.fixya.com/cars/r5843031-tips_check_car_not_start

Jan 06, 2012 | Toyota Cars & Trucks

1 Answer

Was running act like it was running out of gas now won't start


The poor performance of the car makes these faults to come up like abrupt stops or spluttering which undermine the working of the engine. So to start off we need to check from the fuel tank. Check if the fuel contains impurities and specially water. If so this can come up with the pumping when the tank gets empty and produce misfiring, splutter and jerks. So a check on the fuel filter will confirm this as it will be seen, if so remove and clean tank and change the filter. We then come to the fuel pump/carburetor as the fuel mixing and pressure is determined in this section. You need to have the pump calibrated if the pressure at the injector is low.

If the car has starting problems then check these tips:

http://www.fixya.com/cars/r5843031-tips_check_car_not_start

Then we must check with the electrics. The spark intensity is most important .Remove all plugs to check gap and condition of plugs. The black plug indication will confirm that the performance is bad whereas a fully fired plug without deposits must be the ideal view. Check the HT coil and the HT wires, if the intensity is bad this must be swapped and checked to confirm. DO NOT CHANGE any part without a confirmation by trying with a replacement from another vehicle or friend. Finally the LT trigger to the coils must be checked be it from the platinum points or an electronic ignition unit. The voltage of the trigger must be high to give the best HT output.

Now use a strobe to check the Timing on the engine. Adjust if needed to see the TOP DEAD CENTER-TDC- mark. If there is valve noise make sure that the tappets are set properly so that the valves seat firmly for the best compression. Also check compression of engine if there is imbalance on the engine or reduced power.

Thank you for using Fixya

Aug 24, 2011 | 2000 Chevrolet Astro

1 Answer

1979 ford 460 v8 engine on a ford one ton truck frame under a motor home. would not start. installed a rebuilt carburetor and a new fuel pump. got it to run, took it for a test run of 20 miles. at 10 miles...


Pull a couple of the sp. plugs out and see if there is fuel on them. If not pull the o2 sensor out of the exhaust and see if it starts. It will run rough but should start and run. If it does start you have a plugged catalytic converter or muffler and it is putting back pressure on the engine and not allowing the fuel into the cylinders.

Jun 22, 2017 | 1979 Ford F 350

1 Answer

2000 silverado wont start turns over with lots of power . drove fine parked it and now wont start !


It might be the fuel pump, you can test it by pulling off a vacuum line on the intake manifold, then spray a lot of carburetor cleaner into the manifold, then replace the vacuum line and see if the engine will start. If the engine does start and run even for a few seconds, then you have a fuel related problem and it will most likely be the fuel pump itself. (make sure that the carburetor spray that you use says that it is extremely flammable, otherwise it will not start the engine).

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1 Answer

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