It tells your engine control unit (ECU), or simply “computer” how much air is entering the engine. The ECU uses that data to adjust the amount of fuel to deliver to ensure an optimal air/fuel ratio. Unfortunately, since they’re precision electronic devices, mass airflow sensors also have a reputation for being fragile.
Built for performance, LSA engines didn’t use Active Fuel Management (AFM), Variable Valve Timing (VVT), or Flex Fuel (E-85) technology. The blocks were precision-machined using deck plates. They also had piston oil squirters to improve durability.
More importantly, the video will show some simple tests you can do to make sure your mass airflow sensor is the cause of your problem, so you don’t waste money by replacing perfectly good parts. Think because your engine is fuel injected you don’t need to worry about heat causing you problems and stealing horsepower?
Fuel injectors and the rails that hold them are just as susceptible to heat issues as the carburetors they replaced. Located on top of the engine, fuel rails see a lot of heat exposure. On late model vehicles this issue is further compounded by how compact and tight modern engine compartments tend to be, along with the factory engine covers that are all the rage these days, trapping even more heat that can be transferred to the fuel as it flows through the rails on its way to the injectors.
The cylinders can be honed 0.005 in. oversize. This keeps the walls thick enough to support boost. A 4.000-in. stroke crankshaft will also increase displacement. The chart below lists the specs for a common bore and stroke combination.
These LT-based engines are commonly referred to as EcoTec3 5.3L engines. They are all-aluminum small blocks, both of which incorporate Active Fuel Management (AFM), Variable Valve Timing (VVT), and are flex-fuel capable (E85). The engines also use direct fuel injection technology, which shoots fuel directly into the combustion chamber instead of the intake runner.
Unless your pet is a kangaroo, they might struggle to get into a vehicle with a high deck height, like many trucks and SUVs. That’s where pet ramps come in handy. They’re available in a wide range of sizes and most fold compactly and can be stowed away, so you can bring the ramp with you.
I was told I could have a custom computer chip burned so I could run TPI fuel injection on the 350. The EFI system will be modified with an Edelbrock High-Flow base manifold and runners, ported stock plenum, 52mm throttle body, bigger injectors, and an adjustable fuel pressure regulator. I will be using 1-5/8-inch headers and a 3-inch dual exhaust.