If you choose a TBI unit, you will not need as much wiring, fuel rails, manifold modifications for injector bungs, etc. Most important is that you have fuel injectors that are the correct size in terms of flow rating. In fact, most injectors are a similar size physically, though there tends to be more variation in throttle body injection injectors than in port injectors. Typical dimensions for a port injector are: The manifold injector bungs are 0.
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The standard mechanical fuel pump found in classic cars is very reliable. Nevertheless, nothing automotive lasts forever. If your car has an external fuel pump, you'll probably run into situations that will require you to test and possibly replace this component. Learning how to diagnose these problems is essential for keeping your car in shape. On classic cars with mechanical style fuel pumps, however, the pressure is much lower—between four and six PSI. If you suspect that your fuel pump is not producing enough pressure, there are two tests you can perform.
Fuel Injector Symptoms
Fuel injection is the introduction of fuel in an internal combustion engine , most commonly automotive engines , by the means of an injector. All diesel engines use fuel injection by design. Petrol engines can use gasoline direct injection , where the fuel is directly delivered into the combustion chamber , or indirect injection where the fuel is mixed with air before the intake stroke. On petrol engines, fuel injection replaced carburetors from the s onward.
Some background first. One issue I found when I swapped the old carbed out for a TBI , was while driving my truck, I noticed that after using about 13 gallons out of a 20 gallon tank, if I stopped too hard the fuel would slosh forward away from the pump pick-up and the truck would stall. This got annoying but served as a low fuel warning, which was helpful because my fuel level gauge wasn't working at the time.