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187 results for "Ac not cold"

...stry. A reAc tion, combustion in this case, is stoichiometric if all of the constituents (air and fuel) are fully consumed during combustion. While a stoichiometric mixture produces no unwanted by-products, it is rarely of any use to an engine. Inefficiency The average 4-stroke petrol engin...

...erent charAc teristics of the larger diesel fuel molecules that make them different. Diesels have gone through significant changes in recent years, as emission laws have become increasingly stringent. The common rail system is now the industry standard, due to its higher efficiency and grea...

...EGR feedbAc k that are used to monitor and control EGR: Variations in manifold pressure and/or airflow When the EGR is commanded, the exhaust gases replAc e some of the inducted air. This will show as a reduction in air flow in the induction trAc t and an increase in any manifold pressure (p...

...EGR FeedbAc k Exhaust Gas Recirculation (EGR) has been around for many years, but just like any system, it has evolved and variations have been designed by various manufAc turers. This Institute of the Motor Industry (IMI) guide to the basic variations of EGR feedbAc k systems, will help yo...

...s power reAc hing the spark plug means vehicles struggle and expend more fuel to compensate for insufficient power. Vehicle BAc kfiring A bAc kfiring vehicle can be an early symptom of an ignition coil failure. The cause of this is unused fuel , emitted through the exhaust system. If...

...was in plAc e, and although it may have been possible to remove the manifold and strip it down to free off the flaps, this owner wanted it fixed and bAc k on the road. The replAc ement manifold, complete with gaskets, was soon fitted into plAc e and once the codes were cleared and the Audi...

...g issued fAc ed by technicians is the intermittent fault that only occurs rarely, but has a big impAc t on the performance of a customer's car. It disappears just as fast, leaving behind it only a fault code. On investigation of the fault code, there is no apparent issue detected. The fault...

...t was replAc ed in a planned service schedule. But with manufAc turers trying to stretch the life of these coolants, VW have tried a solution that has proven to be a problem in other ways. The manufAc turers installed a silicate bag inside the coolant expansion tank. Over time,...

...nsors and Ac tuators are vital to the correct and efficient performance of the system, as designed by the manufAc turer. Every time the vehicle is powered up, control modules run tests to confirm the integrity of these components. This is where bias signals play a vital part of these power...

...g two surfAc es into contAc t, and at least one of them is moving at high speed, the result will be friction. This friction creates heat, which is transmitted to other parts of a car's braking system. Brake discs are usually made of cast iron, and when they get hot it naturally expands and d...



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