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.
Section 81 (Engine Controls - Removal, Overhaul & Installation - ECONOLINE - NGV): Introduction
Removal, overhaul, and installation procedures for Natural Gas Vehicles (NGV) using Compressed Natural Gas (CNG) are covered in this article. If component removal and installation is primarily an unbolt and bolt-on procedure, only a torque specification may be furnished. Vehicles utilize special fuel tanks, fuel filler valve, fuel pressure regulator, coalescent filter assembly, fuel lines, fuel injectors and control module. Vehicles are not equipped with EGR system, downstream O2 sensors or evaporative emissions systems.
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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.