November 2020

T oday’s emission standards mean that modern petrol cars are, in the main, equipped with direct fuel injection. As the professional mechanic knows, this present problems that traditional fuel injector additives simply cannot solve. The fuel is isolated from the valves and sprays directly into the combustion chamber itself. The valves aren’t naturally cleaned by the usual fuel wash, something that occurs normally with indirect port injection engines. Problems include inlet valves becoming dirty with unburned fuel and oil vapour, resulting in excessive build- up of carbon leading to poor fuel efficiency, a loss of horsepower, misfires and ironically, higher emissions from the contaminated injectors. With the GDI Injector Cleaner, JLM Lubricants was entering an existing product category with room for improvement. Nevertheless, it was crucial to develop a product that was demonstrably better than other additives. So, the formula was put through several stringent tests on real vehicles in real workshops. Within one hour of application the injection time and the emissions were 28 AFTERMARKET NOVEMBER 2020 TECHNICAL www.aftermarketonline.net POPULAR WITH THE PROS A special report from Kalimex on why JLM Lubricants’ GDI Injector Cleaner is such a hit with mechanics. Don’t miss the free giveaway at the end! BY Mike Schlup, Managing Director of Kalimex restored to the factory settings on all vehicles tested. Since its launch 12 months ago, the JLM GDI Injector Cleaner has taken off in 40 countries including the UK. We hope this Q&A encourages you to put the product to the test too. What causes GDI injector problems? GDI engines have become increasingly popular in recent years as the direct injection system produces greater fuel efficiency and reduced emissions. The benefits to the motorist and the environment are important. However as outlined earlier, the technology has its own unique problems. One issue is increased particulates, which can be dealt with using a Gasoline Particulate Filter (GPF) but more of that in another feature. The other problem is a build-up of carbon on the injector nozzle. Over time this impairs the performance of the injector. The engine management system will compensate for the gradual deterioration of the fuel pattern. So, any problems may not be apparent for thousands of miles before the motorist realises this.

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