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Ford 5.0L/5.8L Air Throttle Body Assembly Diagram - Canister Purge Ports & TPS

Service manual page on the air throttle body assembly with a labeled drawing and red-circled annotations on canister purge ports and text.

AI caption · Photo 1764 of 1799

This is a scanned page from a Ford service/reference manual describing the air throttle body assembly used on 5.0L and 5.8L EFI engines. The text lists three additional features of the assembly: a preset stop to locate the WOT (wide open throttle) position, a throttle body mounted throttle position sensor, and canister purge port(s) — two on the 5.0L engine and one on the 5.8L — used for evaporative emission control. Item 3 and the corresponding diagram callout are highlighted with red circles by the uploader, indicating focus on the canister purge ports. Below the text is a labeled line drawing of the air throttle body assembly (figure reference V8035-1A) with callouts identifying the throttle plate set screw, air bypass valve idle speed control, throttle position sensor, and the canister purge ports on the 5.0L version. A reader can learn where the canister purge ports, TPS, and idle air bypass valve are physically located on the throttle body, and that the number of purge ports differs between the 5.0L and 5.8L engines. The page was uploaded to a 1990 Ford Bronco gallery alongside other 1990 emissions-related diagrams.

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Frequently asked questions

How many canister purge ports are on the 5.0L throttle body?
Two. The document states there are two canister purge ports on the 5.0L and one on the 5.8L, used for evaporative emission control.
Where is the throttle position sensor located on the 5.0L/5.8L EFI engine?
It is mounted on the throttle body; the diagram shows the throttle position sensor on the lower left side of the air throttle body assembly.
What controls idle speed on this throttle body?
An air bypass valve (idle speed control), shown mounted on the throttle body in the diagram.
What features are included in the air throttle body assembly?
A preset stop to locate the WOT position, a throttle body mounted throttle position sensor, and canister purge port(s) — two on 5.0L, one on 5.8L — for evaporative emission control. The diagram also shows a throttle plate set screw.

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