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ASE P2 TEST PRIMER: Fuel Systems
Multiport Fuel Injection (MFI) systems have one fuel injector for each of the engine's cylinders and spray fuel into the intake port in the cylinder head. Newer engines with ultra high-pressure "Gasoline Direct Injection" (GDI) spray fuel directly into the combustion chamber.
Fuel Pumps Need To Be Replaced Sooner Or Later
Some pumps last as long as the car itself but most have to be replaced sooner or later for a variety of reasons.
How often do air filters, oil filters and fuel filters need to be changed?
A recent Car Car Council survey found that 23 percent of vehicles inspected (nearly one out of four!) had a dirty air filter that was overdue for replacement.
How Fuel Pumps Work
Most EFI fuel pumps are mounted inside the fuel tank, though some pumps may be mounted outside the tank or be paired with an external pump to push fuel to the engine.
20th Annual Technical Forum: Filters
Q: Filters have long been a common maintenance item. But with longer factory service intervals and “lifetime” filters becoming more common, how often do filters really need to be replaced? A. There’s...
Fuel Additives Can Prevent, Remedy Many Fuel Delivery System Issues
Most of these fuel additives will fall into seven basic categories.
Why are fuel pumps so often misdiagnosed?
Sometimes a fuel pump will run but not spin fast enough to develop normal fuel pressure. This may cause hard starting and poor engine performance.
The Inner Workings Of Fuel Injectors
The only cure for a dead, leaky or defective injector is to replace it with a new or remanufactured injector.
Fuel Pump Add-On Sales
Some common oversights in selling fuel pumps and related parts.
Filters Keep The Bad Stuff Out
Back to school: Refresh your sales skills by reading up on nine essential product categories in our annual technical sales seminar section.
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