E 150 1/2 Ton Van V6-4.2L VIN 2 (1997)
Throttle Body: Description and Operation
Purpose
The throttle body controls airflow to the engine through a butterfly-type valve. The throttle position is controlled by an accelerator cable, attached to a
pedal.
Other features of the throttle body include:
-
A preset stop to locate the Wide-Open Throttle (WOT) position.
-
A throttle body-mounted Throttle Position Sensor (TPS).
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A sludge-resistant coating applied to the downstream side of the throttle plate and bore area to reduce the plate-to-bore leakage. The coating
should NOT be removed or cleaned.
-
The plate position at idle is set by the throttle return control screw contacting the throttle lever arm. Do NOT adjust/tamper with this screw
unless instructed to do so.
Construction
The throttle body is a single-piece die casting made of aluminum.
