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Hey, you're in the vehicle / car zone--YOUR HANDYMAN ZONE!

Cars / Trucks / Vans Category: Emission System

Problem:

Muffler explosion (incorrectly called by many as "backfire") occurs when you start your vehicle.

Tools / Materials (See Below for Applicability):

Solution:

 

A muffler explosion is the noisy blow-out of exhaust from the tailpipe of your vehicle's emission system when fuel that has not been burned (i.e., exhaust) is ignited upon the startup of the vehicle.  Many people mistakenly call this noisy encounter as a "backfire" because of its deceptive similarity. In actuality, a backfire, as the related how-to-page section speaks of, concerns an "explosion" that takes place in the engine system, as opposed to the emission system, where fuel is ignited in the air intake manifold, causing the explosion sound to reverberate through the engine's carburetor.  The following may be probable causes of your vehicle's muffler explosion problem that you should consider checking, causes of which may similarly cause a backfire:

                                (i.)    For Frequent Muffler Explosions:

  • The distributor may be worn out;

  • The engine vacuum may be suffering from a leak;

  • The carburetor may be dirty or otherwise worn out;

  • The timing of the ignition may be detrimentally off;

  • The intake valve train may be worn out; or

  • The exhaust valve train may be worn out.

                                (ii.)    For the Occasional Once-a-Day Muffler Explosion:

  • The air pump diverter valve found in the air injection reaction system may be malfunctioning; or

  • The air valve found in the carburetor's snorkel may be malfunctioning.

Any one of the above can be the cause of your vehicle's problem, so it would be best to pay attention to the above probable causes when attempting to diagnose and fix the problem.

Ed the Handyman

            &

Your Handyman Zone Team

 

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