E 150 Van V8-351 5.8L VIN G 2-bbl (1984)
Wires to the choke relay may be reversed. The following procedures will detect any incorrect relay connections.
Certain 1984 5.8L 4V 49-State and high altitude E150 and E250 Econolines equipped with automatic transmissions and calibrations 4-64G-R02 and
4-64Z-R00 (engine codes EK-410-AA and EK-414-AA) were built and shipped with an incorrectly assembled wiring harness (Part No.
E4UB-9E724-AB) which supplies power to the electric choke. Two of the wires were
installed by the vendor in reversed locations in the harness connector (Part No. D6AB-14489-BA) that attaches to the 12 volt electric choke control
relay. Consequently, the choke does not become electrically heated, which results in the choke plates opening slower than required for proper fuel
combustion.
For a concern of excessive exhaust smoke when the engine is fully warmed, rough idle, poor fuel economy, and possible spark plug fouling, the
following steps should be taken to insure that the electric choke wires are not crossed before performing normal engine diagnostic procedures.
Figure 7
1.
Locate the choke control relay assembly, mounted under the hood (Figure 7).
2.
Check the four (4) wires from the loom to the choke relay connector for color. If the four (4) wire colors are black, black w/yellow stripe, white
w/black stripe and red w/white stripe, the proper loom has been installed and no further action is required. However, if there are two (2) white
w/black stripe wires in the connector, continue with the following steps.
