How does electronic fuel injection affect idle speed?
How does electronic fuel injection affect idle speed?
When engines had carburetors, they always provided a means of adjusting the idle speed. A simple turn of a screw corrected the problem if the engine’s idle speed was too slow or too fast. With electronic Fuel injection they eliminate the manual adjustment and the computer makes all corrections to the engine’s idle speed.
How do you adjust the idle speed of an engine?
They use several designs, but most work in a similar manner. On early vehicles, General Motors often uses a stepper motor that turns a thread valve. Rotation of the armature moves the air valve in and out, adjusting the idle speed of the engine. The older Ford products more often use a spring-load plunger for the idle control valve.
Where is the idle screw on a motorcycle?
Find the idle screw by looking near the base of the float bowl for a spring. The float bowl is basically a miniature gas tank that sits on the bottom of the carburetor. Look around the float bowl for a screw connected to a 1–2 in (2.5–5.1 cm) coil. This is the idle screw.
What happens when idle memory is lost in an engine?
If idle-memory is lost, the PCM may no longer be able to obtain the necessary throttle setting. The engine may stall or idle very low. Correction involves cleaning the throttle and resetting base-idle. Resetting idle may require a scan tool or may occur on its own, after the throttle body is cleaned.
When engines had carburetors, they always provided a means of adjusting the idle speed. A simple turn of a screw corrected the problem if the engine’s idle speed was too slow or too fast. With electronic Fuel injection they eliminate the manual adjustment and the computer makes all corrections to the engine’s idle speed.
Where is the fuel injection idle air control valve?
It’s IAC – idle air control valve , not fuel injector idle air control valve. It’s located on the throttle body -air inlet for the engine . You can’t post conmments that contain an email address.
They use several designs, but most work in a similar manner. On early vehicles, General Motors often uses a stepper motor that turns a thread valve. Rotation of the armature moves the air valve in and out, adjusting the idle speed of the engine. The older Ford products more often use a spring-load plunger for the idle control valve.
What happens to an engine when the idle circuit fails?
The idle circuit eases the transition and allows a more controlled reduction of speed. When the idle circuit fails, the engine may stall when we suddenly release the throttle. A driver often sees this as the engine dying, but failure to idle is very different from a standpoint of diagnosis.
