To find out how a slow-to-prime fuel pump can manifest into performance and even some engine-related problems. One of the common causes for it is a fuel filter that has been stuck. When a fuel filter gets clogged, fuel flow slows down which can prevent the pump from generating enough pressure. Research studies have proved that average 30% of fuel system problems are obstruction in filters, which put high pressure on the priming process.
In addition, the fuel pump wears as it is used which can also contribute to a slower prime. At or around 100,000 miles, the fuel pump can lose performance because that is about the time it normally dies. A 2019 study found that vehicles with fuel pumps more than a decade old were 40% more likely to experience slow priming. The older pumps sometimes cannot make the pressure they need to, therefore it takes longer for them to prime, notes another shop mechanic.
Avery common cause of this condition is air leaks in the fuel system. A fuel line with just a tiny air leak can cause the pump from picking up fuel correctly. In both cases, this can result in hard starting and slow primes. If a driver experiences an air leak damage then the vehicle can take 5-10 seconds more just to start which can be very annoying.
In an automotive event from 2020, slow priming problems were encountered on a widespread basis by a leading automaker courtesy of poorly designed pumps. A slower-than-normal priming process–a manufacturing deficiency–was directly blamed for the hutch failure after investigations determined about 20% of all affected vehicles suffered from it. One knowledgable automotive enthusiast we talked to, said “when you have a setup where the design of the fuel pump is not conducive to easy priming, it causes time for the driver to deal with and be frustrated [by.
In addition, the priming process could be impeded if there are fuel contaminants. If the fuel tank is full of dirt and debris then the pump won’t be able to draw up any fuel which slows down prime times. Routine maintenance is a key part, as it has been proven that vehicles with regular fuel system inspections have 30% less slow priming problems.
Slow priming: Drivers will face slow priming, immediate inspection of the fuel system is necessary. Dealing with these things quickly will prevent things like engine misfires or stalling from occuring. Fuel Pump offers great quality fuel system components.