![]() Once you’ve checked the spark plugs, it’s time to test the coil packs. The spark plug to the left was bad enough to cause a bad backfire and threw the P0301 trouble code, which indicated cylinder 1 had the misfire If the spark plugs look like they’ve fouled out, they are going to need replaced. Here’s a writeup on how to tell if your Equinox has bad spark plugs. It is also one of the most common reasons that a gas engine backfires. Taking a look at the spark plugs and determining their health is the easiest thing that you can do. It would be best to start with what is easiest. They will provide you with vital information that’ll help you narrow down why your Equinox is backfiring. If it is on, you can pull the diagnostic trouble does with a good code scanner. ![]() The best way to start is to start with the check engine light. Here’s more on detecting a bad timing chain/belt. If it jumps a tooth, it can throw the entire vehicles timing off to the point that it can backfire. Your Equinox uses a timing chain or belt to keep the camshaft(s) and the crankshaft synced together. You’ll often get trouble codes P0011 or P0014. When VVT goes bad, it can leave your Equinox with the wrong timing for the situation. Many modern vehicles use variable valve timing (VVT). Ignition timing is a very common cause of backfiring. A rich condition can occur when one of these sensors has failed. Your Equinox uses a series of sensors to measure the air and fuel going into the engine, as well as the oxygen content of the exhaust. When this happens, backfiring is the byproduct. On the exhaust stroke this mixture will burn up creating the loud backfire.Ī rich fuel mixture leads to there being leftover fuel after combustion. When this happens a weak spark ignites the mixture of air and fuel in the combustion chamber leaving fuel behind. Typically, only older models use a distributor these days.Īny part of the ignition system can go bad. The engine may use an ignition coil and distributor instead of a coil pack for each cylinder. Your Chevy Equinox’s ignition system consists of spark plugs and ignition coil packs. Here are the main reasons why your Chevy Equinox would be backfiring: 1. If your Chevy Equinox is backfiring, common causes include improper engine timing, bad spark plugs, engine running rich, and plug wires (if so equipped). It sounds like a shotgun blast and can scare you if you’re not prepared for it. Find out more about our advertising opportunities.One of the more jarring vehicle problems that you can experience is a backfire. Advertise Advertising on is well-targeted, has unique benefits, and is highly successful. Looking for something lighter? Read our funny complaints to see people who found humor in a bad situation. Vehicle Problems Find out what cars to avoid, view the latest problem trends, or keep up-to-date with the most recently reported problems. Contact us with any comments or concerns. Car Problem Resources Around the Site Information Find out more about us in the press or read stories from drivers who praise our work.The complaints are organized into groups with data published by vehicle, vehicle component, and specific problem. ® is an online automotive complaint resource that uses graphs to show automotive defect patterns, based on complaint data submitted by visitors to the site.
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