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.
Alternative Fuel Control Module (AFCM)
AFCM allows communication between compuvalve and PCM. On Contour, the AFCM is located under the front of center console. On all models, AFCM communicates desired ALT or GAS operating mode to PCM. AFCM shares information between PCM and compuvalve and assists in troubleshooting the bi-fuel system. If operating conditions are satisfactory and ALT/GAS switch on dash is in ALT mode position, the compuvalve will signal PCM to turn gasoline fuel injectors off. If operating vehicle in ALT mode and CNG fuel source drops below a specified amount, compuvalve will signal PCM through the AFCM to turn gasoline fuel injectors on. When this occurs, compuvalve will shut off CNG fuel supply, allowing CNG and gasoline fuel systems to switch smoothly.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.