4-Cylinder Sequential Gas Injection Conversion Kit
This product page covers a four-cylinder sequential gas injection conversion kit. Select the CNG or LPG configuration according to the vehicle and required fuel. Confirm the engine application, component models and included parts before ordering.
Sequential injection means individually controlled gas delivery to each cylinder. Compatibility depends on the petrol injection system, gas ECU, injectors, pressure regulator and calibration. Read our sequential gas injection explanation for system basics.
Which Configuration Do You Need?
Four cylinders alone do not establish compatibility. Provide the engine code and original injection type before selecting a kit. Displacement and vehicle model help identify the application, but they do not replace a configuration review.
| Product Type | Sequential gas injection conversion kit |
|---|---|
| Cylinder Configuration | 4-cylinder application; confirm engine compatibility |
| Gas Fuel | CNG or LPG; specify the required configuration |
| Original Injection System | Identify port fuel injection or direct injection before selection |
| Engine Details | Provide engine code, displacement, power and turbo status |
| Electrical Compatibility | Confirm supply voltage, connectors and required signal interfaces |
| Included Components | Use the itemized quotation for the selected configuration |
| Weight and Dimensions | Confirm for the specified kit; distinguish net and packed weight |
Should You Choose CNG or LPG?
CNG and LPG require fuel-specific configurations. Do not assume that one regulator, cylinder or installation arrangement can serve both fuels. State the required fuel when requesting a quotation.
CNG configuration: Confirm the regulator's rated inlet pressure, outlet pressure, flow capacity and connection specifications.
LPG configuration: Confirm the selected LPG regulator or vaporizer, fuel delivery arrangement and heating requirements.
Both configurations: Match injectors, sensors, hoses and seals to their specified fuel and operating conditions.
Fuel selection determines component selection. Compare CNG and LPG pressure reducers before specifying the kit.
What Does the Quoted Kit Include?
The itemized quotation defines the supplied kit. Product photographs may show a configuration that differs from your order. Confirm each component's model, quantity and connection type.
| Component | Function | Information to Confirm |
|---|---|---|
| Gas ECU | Controls gas injection for the selected application | Model, cylinder support, wiring diagram, software version and whether OBD functionality is included |
| Injector Rail | Meters gas to the engine's intake ports | Model, coil resistance in Ω, flow data, operating pressure and ECU driver compatibility |
| Pressure Regulator | Conditions gas pressure for the injection system | Fuel, rated pressure in bar or MPa, flow capacity and temperature range in °C |
| Filter | Filters contaminants according to its specified design | Fuel phase, filtration rating in μm, connection size and replacement instructions |
| Harness and Sensors | Connect the controller to required inputs and outputs | Connector types, sensor specifications, pin assignments and cable lengths |
| Changeover Switch | Provides the supported fuel selection and display functions | ECU compatibility, switching logic and level-sensor compatibility |
Cylinders and installation hardware must be confirmed separately. Check whether valves, filling connections, pipes, hoses, brackets and calibration interfaces are included. See the conversion kit component guide for a component overview.
Will It Work With Your Engine?
Port injection and direct injection require different compatibility checks. PFI means port fuel injection. GDI means gasoline direct injection. Do not treat a four-cylinder PFI kit as a confirmed GDI solution.
PFI engines: Confirm petrol injector signals, ECU compatibility and the proposed gas injection configuration.
GDI or TGDI engines: Request support for the exact engine code, including the specified operating strategy and calibration.
Turbocharged engines: Confirm regulator capacity, injector flow and pressure control under boost.
Fleet applications: Record the model year and engine code for each vehicle group. Do not assume all vehicles with the same model name use the same engine.
Direct-injection applications need a separate review. Consult our GDI conversion guide before requesting a configuration.
Which Specifications and Tests Should You Verify?
Technical claims need model-specific evidence. A processor description or a general factory photograph does not establish injector response, pressure performance or enclosure protection.
Injector response: Request opening and closing data in milliseconds, with test voltage, gas pressure and temperature stated.
Regulator performance: Request inlet and outlet pressure limits, rated flow and the conditions used for capacity testing.
Leak testing: Request the test medium, pressure, duration, acceptance limit and traceable inspection record.
Electrical testing: Confirm supply-voltage limits, output checks and the applicable test procedure.
Ingress protection: If an IP rating is claimed, request the applicable IEC 60529 test report and its exact component scope.
Approval documents: Check the certificate number, covered model, issuing body and applicability to the destination market.
Certificates apply to the products and scope stated in their documents. Review our certification information and request documents for the configuration you intend to purchase.
What Must Be Checked During Calibration?
Calibration must match the installed components and engine. Confirm the ECU software, injector settings and pressure settings before evaluating operation. Do not assume OBD adjustment is included in every ECU version.
Record the ECU model and software version.
Confirm the selected injector type and relevant settings.
Check sensor readings against the installation instructions.
Verify operation at idle and across the specified load range.
Record fuel-switching behavior and any diagnostic faults.
Use the manufacturer's specified changeover conditions.
A fixed changeover temperature is not universal. Use the setting specified for the selected system. See our injector rail and ECU calibration guide for related information.
How Should You Estimate Fuel Savings?
Calculate operating cost per kilometer instead of assuming a fixed saving. Use local fuel prices and measured vehicle consumption. Compare equivalent routes, loads and driving conditions.
Petrol cost per kilometer: Petrol consumption in L/100 km × price per L ÷ 100.
Gas cost per kilometer: Gas consumption per 100 km × price per matching unit ÷ 100. Add petrol consumption if the operating strategy uses petrol.
Fuel saving percentage: (Petrol cost per kilometer − converted fuel cost per kilometer) ÷ petrol cost per kilometer × 100%.
Payback calculation: Divide the installed conversion cost by the measured net monthly saving. Include additional maintenance costs.
Gas consumption and price must use matching units. Do not compare CNG priced per kg with consumption measured in m³ without an appropriate conversion basis.
Frequently Asked Questions
Does the kit guarantee unchanged engine power?
No fixed power result is established by the information on this page. Evaluate the selected vehicle and configuration under defined conditions. Request measured results if power retention is a purchasing requirement.
What are the kit weight and package dimensions?
Weight and dimensions depend on the selected configuration. Request the net weight, packed weight and carton dimensions for your itemized quotation before arranging transport.
What maintenance interval should installers follow?
Use the schedule supplied for the installed components. Filter replacement and inspection intervals depend on the component, operating conditions and local requirements. Refer to our gas conversion kit maintenance guide and request the model-specific instructions.
Are warranty and sample orders available?
The quotation should state the applicable commercial terms. Confirm sample availability, minimum order quantity, warranty duration, exclusions, lead time and payment terms before ordering.
Request a Matched Configuration and Quotation
Send vehicle details first to obtain a configuration-specific quotation. Include the following information:
Vehicle make, model and year
Engine code, displacement and rated power
PFI, GDI or other original fuel injection type
Naturally aspirated or turbocharged engine
Required fuel: CNG or LPG
Destination country and order quantity
Required kit components and documentation
Ask for an itemized offer. It should identify component models, included and excluded parts, price, delivery terms and the documentation available for the selected configuration.
