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.
Fuel Injection System - TBI: Identification
The throttle body injection identification number is stamped on mounting flange, on throttle lever side. See Fig 1. Alphabetical code letters are stamped on the throttle body at external tube locations to identify vacuum hose connections.
All Astro, Safari and "S" series vehicles use either the model 220 or model 700 TBI unit. The "R" and "V" series use the model 220 TBI unit. All "G" series vans and "P" series trucks use the model 220 TBI unit.
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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.