Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1985ASTRO VAN CARGO, 4.3 N, STANDARD, MH3REPAIR AND DIAGNOSIS (SINGLE PAGE)TRANSMISSIONAUTOMATIC TRANSSERVICING - A/TADJUSTMENTSDETENT (DOWNSHIFT) OR THROTTLE VALVE (T.V.) CABLEDIESEL ENGINES
1985 Chevrolet Astro Van Cargo, 4.3 N, Standard, MH3
Diesel Engines
1985 Chevrolet Astro Van Cargo, 4.3 N, Standard, MH3SECTION Diesel Engines
- Remove cruise control rod (if equipped). Disconnect detent cable terminal from throttle assembly. Loosen lock nut on pump rod and back off several turns. Rotate throttle lever assembly (at valve body) to full open position and hold.
- Lengthen pump rod until injection pump lever contacts full throttle stop. Release throttle lever and tighten pump rod lock nut.
T.V. cable is used only on 700-R4 transmissions.
All other vehicles use detent cable.
- Remove pump rod from lever assembly. Reconnect detent cable terminal to throttle assembly. Depress and hold metal adjusting tab on cable adjuster. Move slider through fitting, away from throttle lever, until slider stops against fitting. Release tab.
- Rotate lever assembly to full throttle position and release. Reconnect pump rod. If equipped with cruise control, reconnect rod and adjust servo throttle rod to minimum slack with engine off. Install clip in free hole nearest to bellcrank and within servo bail.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.