Forcing Vehicle Monitors For Calibration
Simple Fixes For Bad Battery Connections
Quality-Built Brake Pads and Rotors Powered by MPA
Misfire Codes After A Spark Plug Replacement (Video)
Forcing Vehicle Monitors For Calibration
Simple Fixes For Bad Battery Connections
Quality-Built Brake Pads and Rotors Powered by MPA
Misfire Codes After A Spark Plug Replacement (Video)
Sponsored By NGK Spark Plugs
Modern Cooling System Diagnostics: Pumps, Fans and Thermostats
Sponsored By Carter Fuel Systems
All modern engines need a specific air/fuel ratio for efficient operation. But the mixture of air and fuel must be at the correct temperature inside the combustion chamber. If a cylinder is too cold, it will require extra fuel. Conversely, if a cylinder is too hot, the fuel and air could combust prematurely or produce less power. Controlling the temperature is the responsibility of the water pump, thermostat and fans. In a 45-minute webinar, experts from Carter will cover how a cooling system regulates the temperature in the combustion chamber to achieve optimal combustion events.
Speakers Andrew Markel, Director of Technical Content, ShopOwner
Sponsored By Carter Fuel Systems
Sponsored By NGK Spark Plugs
The new issue of ShopOwner magazine is now available to read online or download at no charge to you!
TPMS sensor signals are low power and low frequency, with most sensors transmitting at 315MHz or 433MHz.
One of the problems with ethanol is how it reacts to water in the air and in the tank.
Underhood Service targets repair shops that derive 50 percent or more of their revenue from the service and repair of under-the-hood systems. The expanding amount of knowledge and capital needed to keep up with technological advances has led these shop owners to concentrate on underhood systems, while also offering preventive maintenance services on most major vehicle systems. By subscribing, you’ll receive the ShopOwner digital edition magazine (12 times/year) featuring articles from Underhood Service and the Underhood Service eNewsletter (twice weekly). Access to digital editions, contests, news, and more are ready for you today!
Underhood Service targets repair shops that derive 50 percent or more of their revenue from the service and repair of under-the-hood systems. The expanding amount of knowledge and capital needed to keep up with technological advances has led these shop owners to concentrate on underhood systems, while also offering preventive maintenance services on most major vehicle systems. By subscribing, you’ll receive the ShopOwner digital edition magazine (12 times/year) featuring articles from Underhood Service and the Underhood Service eNewsletter (twice weekly). Access to digital editions, contests, news, and more are ready for you today!
ByAmy Antenora Antenora on Jul 21, 2022
High underhood temps, increased power demands and vibration can damage alternators or starters. Sponsored by ACDelco.
Don’t settle for “almost” - it matters where the engine is manufactured or remanufactured. Sponsored by ACDelco.
Brake pads are thoroughly developed to produce the best result. This video is sponsored by ZF Aftermarket.
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Code P0316: Engine Misfire Detected on Startup (First 1000 Revolutions) could have many causes. Sponsored by Autolite.
Let’s talk about misfire codes, specifically “P0316: Engine Misfire Detected on Startup (First 1000 Revolutions)”. What does this code mean, and how do you diagnose the root cause?
Around the 2006 model year, cold start emissions monitoring became mandatory here in the US. Before this mandate, emissions monitoring wouldn’t begin until after the engine reached operating temperature, and it entered into closed loop fueling. Oxygen sensors are the primary device for emissions monitoring, but they are inactive when the engine is cold. They simply aren’t reliable for cold start monitoring.
However, the misfire monitor is working from the first revolution of the engine. This monitor uses the crankshaft position sensor to measure crankshaft acceleration, then it compares the acceleration readings for each cylinder. A misfiring cylinder will produce a slower crankshaft acceleration speed. The monitor will recognize this and illuminate the check engine light.
There are a number of possible causes for this code to be set. Start with the basics: fuel, compression, and spark. While it is possible for a set of old, worn out spark plugs to cause this code, it’s not the most likely reason. However, if that P0316 code is accompanied by other cylinder-specific misfire codes, the plugs, wires and/or coils could be a more likely culprit.
Winter blend fuel is probably the most common reason for this code, especially during the fall months as the gas stations start to transition between fuel blends.
A burned valve or valve seat could cause this code to set, this can easily be confirmed with compression and cylinder leak-down tests. A faulty head gasket could leak coolant into the cylinder, causing a misfire immediately upon startup. Once that coolant works its way out of the engine, the misfire would go away. Customers may notice that they’re having to fill the coolant tank but there are no external leaks on the engine.
This video is sponsored by Autolite
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Technical resources to help diagnose and repair engine-related service issues.