Question about 1985 Chevrolet El Camino

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I have an 85 and its backfiring out of the carburetor,i just re did the carb,and all top gaskets-intake manifold and valve cover,also put in new water pump and thermostat

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  • Chevrolet Master
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Double check you spark plug wires to make sure you have the firing order right and aren't off time on the distributor. You should also re-check you timing.

Posted on Jun 24, 2009

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Having a backfire issue in exhaust during acceleration and release of throttle. I have cleaned carb, replaced intake manifold boot and gasket, relaced air filter and cleaned airbox. not sure if I have a...


Not sure what vehicle you are talking about, but backfiring is caused by gas not being fully combusted by the engine and passing into the exhaust system and igniting. So, when you step on the gas pedal, you are probably flooding the engine - I suggest you have another close look at your carburetor. There are also other less common reasons for incomplete combustion (e.g. timing, poor ignition, etc.).

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How to remove/replace the Valve Cover Gaskets on a New Beetle car?


Replace the valve cover gasket if the valve cover gaskets are leaking or if they're worn. The procedure is as follows:--
1) First of all let the motor cool down if the car was recently driven. Then remove the air intake boot.The air intake boot ios attached to the engine's throttle body.
2) Carefully disconnect the throttle cable , hoses and electrical connectors located on the upper intake manifold.
3) Then disconnect the hard pipe that is connected to the EGR (exhaust gas recirculation) valve.
4) The EGR valve is located beneath the upper intake manifold.
5) Then remove the bolts from both the upper intake manifold and the manifold support bracket.
6) Now the upper intake main fold and lower intake manifold both have got loose as you removed the nut.
7) After that remove the upper intake manifold from the lower intake manifold. Carefully place clean rags over the intake runners to prevent anything from falling into the intake system.
8) Then you will have to disconnect the crank case breather valve on the valve cover.
9) Then remove the bolts from the valve cover and remove the reinforcing straps.
10) Then remove the camshaft belt cover and the dust shield from the back of the camshaft sprocket.
11) Now carefully remove the valve cover. Properly clean the old gasket material with gasket remover.
12) You can install a new gasket in the reverse procedure of removal.


This will help. good luck.

on Mar 09, 2010 | Volkswagen Beetle Cars & Trucks

1 Answer

After replacing my intake manifold and carburetor my engine wont start, only sometimes but it would sound ugly and run very roughly at 400 rpm. PLEASE HELP


You have leaks in your gaskets. or vacuum lines removed and not replaced or broken in the operation. trace air leaks with propane torch unlit. where engine speed increases, you have an air or vacuum leak.

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2006 Kia Sedona Shaking & Vibrating Problems


From a quick search online and reading a little in some forums, it looks like the transmission fluid has to meet certain specs, and there may be only a few aftermarket fluids that do. Probably need to check to see if the fluid you used meets the Kia specs. You may have to do a drain and fill at least once if you contaminated it with an incompatible fluid.
You can use cheap carb cleaner to spray around manifold gaskets while the engine is idling to check for leaks. If it sucks the carb cleaner in, the idle will stumble and you found a leak.
Valve cover gasket shouldn't affect engine running. Might cause an oil leak, but that's about it.

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Backfire through carburater


check the compression,and the firing order.

Sep 29, 2010 | Ford F-150 Cars & Trucks

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1984 F150 won't idle


It sounds to me like there is still a pretty good vacuum leak somewhere, and you should also check for any dis-connected or missing vacuum lines on the intake manifold, at the carburetor, and the large vacuum hose to the brake booster unit and the vacuum valve at the brake booster unit for any vacuum leaks or broken vacuum lines/hoses, and they can be hard to find because cracks in the vacuum hoses like to hide on the under-side of the vacuum lines/hoses especially the hard plastic ones. Also the carburetor could be loose or the carburetor base gasket could be damaged, the EGR valve gasket could be damaged, or the intake manifold gasket could be damaged, and these are all the most likely places to suspect a major vacuum leak.

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1 Answer

What causes our 1986 chevy motorhome to back fire through the carburator? This occurs when you first take off, it stops after awhile when warmed up. Carburator has been rebuilt, new plugs, wires and cap....


Backfire in an automobile engine typically results from various malfunctions related to the air fuel ratio. Backfiring can occur in carburetor engines that are running lean where the air-fuel mixture has insufficient fuel and whenever the timing is too advanced. As the engine runs leaner or if there is less time for the fuel to burn in the combustion chamber, there is a tendency for incomplete combustion. The condition that causes this is a misfire. The result of a misfire or incomplete combustion is that unburned fuel or flammable hydrocarbons are delivered to the exhaust manifold where it may ignite unpredictably.


When starting an engine, timing that is too advanced will fire the spark plug before the intake valve is closed. The flame front will travel back in to the intake manifold, igniting all of that air and fuel as well. The resulting explosion then travels out of the carburetor and air cleaner. A common air filter will allow the gases to escape, but will block the flame front. On many small marine engines, no air filter is used, but a screen is placed over the intake of the carburetor as a flame arrest to prevent these flames from escaping the intake, and potentially igniting fuel, or fuel vapors in the enclosed sump or bilge of the boat and causing a fire or explosion. Improperly adjusted carburetors that create a lean condition during acceleration can cause the air fuel mixture to burn so slowly, that combustion is still taking place during the exhaust stroke, and even when the intake valve opens. The flame front can then travel up the intake and cause a backfire. In this situation it is conceivable that there is a backfire occurring in the intake manifold and exhaust manifold simultaneously.

Good luck and hope this helps, check the carburetor settings to make sure it's not running too lean and the timing . Keep me posted, be glad to help you get your RV running 100% again.

Jul 14, 2009 | 1995 Chevrolet C/K 3500

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Vacuum Leak on a 2000 Honda passport


Replace upper intake gaskets. They are made of metal and plastic. A common problem. Do not remove the very top plenum cover gasket.

Apr 24, 2009 | 2000 Honda Passport

1 Answer

How do i replace value cover gaskets on a 2001 cadillac deville


If you have your intake manifold over your valve covers you need to remove them. once they are off carefully disconnect as many hoses from the covers as you can and try to mark them so you can remember where they go. next you take your ratchet and remove all of the bolts from the valve cover. Take it off and get as much crud off of the surfaces that the gaskets seat onto as you can. next you take a tube of BLUE RTV and apply a thin bead to all of the surfaces that the gasket will seat into. Put gasket onto it's place on engine block, then affix the valve covers on top of that. Replace bolts and intake manifold if applicable and you are done. Note; follow instructions on the RTV tube or you will develop leaks all over the place.

Mar 11, 2009 | 2001 Cadillac DeVille

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