What do spark plugs do?
Spark plugs convert electric current from the ignition coil into a spark that ignites the fuel and air mix inside the car engine. This combustion is what powers the engine and moves the car. Spark plugs are located in the cylinder head and are connected via external leads attached to the engine.
How often should spark plugs need replacing?
Most manufacturers recommend that spark plugs should be replaced at around every 30k miles; this is only a guideline, as the quality of the component, engine performance and driving habits can affect spark plug lifespan significantly.
The law, vehicle regulations and your MOT
Old or damaged spark plugs can affect engine performance areas that cause an MOT failure, for example, in emissions testing. Poor performing spark plugs or filters that clog up can affect the gasses that are delivered from your exhaust; replacing these faulty parts can often rectify the problem.
What causes spark plugs to stop working correctly?
Spark plugs can wear out over time, at which point they should be replaced to ensure the correct combustion of fuel. There is also a chance of potential carbon build up on the electrodes; this is known as carbon fouling and will affect the correct operation of the spark plugs. Oil can build up on the spark plugs too, which can be rectified with a simple cleaning.
Spark plugs can occasionally melt due to excessive engine temperatures. This isn’t usually a spark plug fault, but that of the engine or fuel system.
Symptoms of malfunctioning spark plugs
Starting your engine is problematic
If your car struggles or fails to start, it could be down to faulty spark plugs.
Engine cut out or misfiring
If your engine cuts out after starting or during its usual operation, if it fails to run smoothly or it vibrates excessively under normal use, then your spark plugs could be due to worn out spark plugs.
The dashboard engine warning light is illuminated
Any dashboard warning light is due to a sensor detecting fault or incorrect operation of a related component. An engine warning light could relate to a faulty spark plug.
Fuel consumption is higher than normal
Faulty spark plugs can cause your engine to burn fuel in an erratic manner, affecting both vehicle performance and fuel consumption. If you notice a change in your fuel consumption, it could be a spark plug problem.
Jeep is a brand of American automobiles, established over 70 years ago in 1943, and has been owned by the Italian-American corporation Fiat Chrysler Automobiles since 1987.
How popular is Jeep in the United Kingdom?
Jeep’s current range consists solely of SUV and off-road vehicles, but there’s plenty available for every eventuality. Whether you need a car for an out-and-out adventure or a luxury family vehicle, Jeep has something for just about anyone.
There were 83k Jeep vehicles on the UK roads by the end of 2018, a number that could show signs of growth with the marque’s plans to introduce more small and large SUVs and fully electric models to the range.
Crossing streams or navigating the school run—you can do it all in a Jeep
With a 5-year warranty and a selection of body styles and sizes, Jeep has SUVs and 4x4s that traverse the full range. With a starting price of under £20k for the compact Renegade, all the way up the ranks to the £90k Grand Cherokee Trackhawk, Jeep will get you where you’re going, however you choose to do it.
Be part of the Jeep family at Camp Jeep
For Jeep owners across Europe, and in some of the most stunning and challenging locations available, Camp Jeep gives their drivers an event of their own to celebrate the bond between the brand and its fans. With a packed programme of off-road test-driving, and theory and practical courses held by the Jeep Academy, the camp is backed up with additional social activities including hot air balloon flights, concerts and family fun and games to provide the perfect atmosphere.
You don’t get that kind of inclusion from any of the typical mainstream brands.
Jeep’s reliability and reputation
Jeep ranked 29th place out of 30 car brands in the What Car? Reliability Survey in 2018. With a fairly low score of 82.7% (but not as low as Land Rover’s 76.5%), it’s somewhat of a surprise for a car that is designed to go anywhere and handle whatever you can throw at it.
Recent Jeep recalls and reliability issues
Various recalls have been made on Jeep models throughout their motoring history. The following are a list of the most recent in the UK and Europe.
04/03/2019 – Jeep Wrangler (2018)
The welds on the front track bar bracket may not be located correctly on the seam.
03/02/2019 – Jeep Compass & Jeep Cherokee (2018)
Incorrect coating of the brake pistons can result in the formation of gas in the hydraulic system.
12/10/2018 – Jeep Compass (2017–2018)
A faulty rear seat-back locking mechanism could lead to the seat back folding forward unexpectedly in the event of rapid deceleration.
12/10/2018 – Jeep Liberty (2003–2007)
Corrosion on the rear transverse control arms may cause them to break.
06/10/2018 – Jeep Compass (2016–2017)
The electrical connections for the daytime running lamps are inadequate and the lights may be disabled by the driver.
06/10/2018 – Jeep Compass (2018)
Due to inadequate welding, the front transverse control arm may break.
16/06/2018 – Jeep Liberty, Jeep Cherokee (2011–2013)
There is an internal fault in the control module for the occupant restraint controller.
03/02/2018 – Jeep Compass (2017)
The securing nuts on the front passenger airbag may be loose.
All recall information sourced from gov.co.uk data.