AUTOOL PT640 Digital GDI Fuel Pressure Tester
US$189.00
- 0–360 Bar GDI Test
- 1% FS Accuracy / 0.1 Resolution
- Current, Max, Min + Differential
- Three Pressure Units
- 0–360 Bar GDI Test: Measure automotive GDI and direct-injection fuel pressure from 0 to 360 bar.
- 1% FS Accuracy / 0.1 Resolution: Read pressure with 1% FS accuracy and 0.1-unit display resolution.
- Current, Max, Min + Differential: View current, maximum, minimum, and differential pressure on the 2.8-inch backlit display.
- Three Pressure Units: Switch among bar, kg/cm², and psi.
- GDI Connection Kit: Use the adapter hoses, metal fittings, and T connector at compatible GDI test points.
- 0–360 Bar GDI Test: Measure automotive GDI and direct-injection fuel pressure from 0 to 360 bar.
- 1% FS Accuracy / 0.1 Resolution: Read pressure with 1% FS accuracy and 0.1-unit display resolution.
- Current, Max, Min + Differential: View current, maximum, minimum, and differential pressure on the 2.8-inch backlit display.
- Three Pressure Units: Switch among bar, kg/cm², and psi.
- GDI Connection Kit: Use the adapter hoses, metal fittings, and T connector at compatible GDI test points.
- 3-Year Warranty Main unit 3 years · Accessories 1 year
- 90-Day Returns Eligible returns within 90 days
- Official Store Genuine products · Direct support
AUTOOL PT640 · 0–360 Bar GDI Pressure Tester
Measure Direct-Injection Pressure Digitally
Measure GDI and direct-injection fuel pressure digitally at a verified high-pressure test point. PT640 covers 0–360 bar and tracks current, maximum, minimum, and differential pressure on its backlit display. Three selectable units and the supplied hose-and-fitting set help match compatible service procedures without mechanical-gauge interpretation.
- 0–360 Bar GDI Range
- Stated 1% FS Accuracy
- Current / Max / Min / Differential
- Three Pressure Units
- GDI Hose And Adapter Set
Key Features
High-Pressure Range with GDI Fuel Adapters
Wide GDI Pressure Range
Measures 0-360bar / 0-5221.3psi / 0-367kg/cm², making it suitable for automotive direct injection fuel pressure testing. Use only the verified GDI-rated hose/adapter after the specified depressurization procedure; this 0–360 bar path does not authorize diesel common-rail connection.
Multi-Unit Switching
Supports bar, kg/cm², and Psi pressure units, allowing technicians to switch units according to diagnostic habits and service standards.
2.8-Inch Backlit Display
The 2.8-inch backlit display improves readability in low-light environments and clearly presents current pressure, maximum pressure, minimum pressure, and differential pressure.
Data Holding And Zeroing
Lock the data and interface for stable observation, then use clear / zeroing functions to reset data and pressure before or after measurement.
Digital Measurement System
The advanced digital measurement system provides wide-range pressure measurement with 1% FS accuracy and 0.1-unit resolution.
Adapters For Vehicle Connection
Use the verified GDI-rated hose and adapter only after the specified depressurization procedure. The 0–360 bar test path is for supported GDI fuel systems, not diesel common-rail systems.
AAA Battery Power
PT640 uses 4 × 1.5V AAA batteries. Open the rear battery cover and install the batteries according to the positive and negative polarity marks.
3 Years Warranty Support
Main unit: 3-year warranty. Standard accessories: 1-year warranty. Warranty Policy.
Service Workflow
Depressurize, Connect and Run the Specified Test
Release Fuel Pressure
Unplug the fuel pump fuse, relay, or oil pump plug. Start the engine until it stalls, start it again 2-3 times, then disconnect the negative battery terminal.
Install Batteries
Open the rear battery cover and install 4 × 1.5V AAA batteries according to the positive and negative polarity marks.
Select Adapter
Choose the adapter suitable for the vehicle model and connect it to the measuring probe before connecting the pressure tester.
Connect To GDI Fuel Line
Depressurize the gasoline direct-injection system by the vehicle procedure, then install only the verified GDI-rated hose and adapter. Do not connect PT640 to diesel common rail.
Measure And Record
Long-press to power on, long-press zeroing, select the pressure unit, and start measurement. The device displays the fuel pressure value and related pressure data.
Safe Use
Treat GDI Pressure as High-Energy Work
Interpret GDI Fuel Pressure Results in Context
Keep PT640 to the stated gasoline direct-injection path and verified 0–360 bar sensor/adapter set. Do not extend it to diesel common rail or infer safe access from display range alone.
Prevent Spills and Store Dry
When removing the oil pipe, place a towel or cotton cloth under the interface to prevent fuel from reaching the ground. Store the product in a dry place when not in use.
Model Comparison
Choose the Right Pressure Test Kit
Model Guide
Choose one or more models. PT640 is selected by default.
| Product Name | PT610 Cylinder Pressure Gauge | PT620 Oil Pressure Gauge Kit | PT630 Fuel Pressure Gauge | PT635 Fuel Pressure Gauge(High-end version) | PT640 GDI Fuel Pressure Gauge | PT650 Transmission Oil Pressure Gauge | PT660 Brake System Pressure Tester |
|---|---|---|---|---|---|---|---|
| Measurement & Readout | |||||||
| Display Screen | 2.8-inch | 2.8-inch | 2.8-inch | 2.8-inch | 2.8-inch | 2.8-inch | 3-inch |
| Data Storage | 6 Sets of Data | × | × | × | × | × | Locks the current reading; check the current specification for multi-record storage. |
| Pressure Range | 0-426.6psi 0-30kg/cm² 0-29.4bar | 0-426.6psi 0-30kg/cm² 0-29.4bar | 0-426.6psi 0-30kg/cm² 0-29.4bar | 0-426.6psi 0-30kg/cm² 0-29.4bar | 0-5221.3psi 0-367kg/cm² 0-360bar | 0-426.6psi 0-30kg/cm² 0-29.4bar | 0–210 bar |
| Dual-Channel Pressure Testing | × | × | × | × | × | × | Two brake positions/calipers via L/R channels |
| Data Lock/Clear/Record | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Multi-Parameter Display | Current Temp Measurement Time Real-Time Pressure Value Average Pressure Value Pressure value of each cylinder | Measurement Time Pressure Maximum Pressure Minimum Pressure Differential | Maximum Value Minimum Value Differential Pressure Value Measurement Time Real-Time Pressure Value | Maximum Value Minimum Value Average Value Temperature Value Measurement Time Real-Time Pressure Value | Maximum Value Minimum Value Differential Pressure Value Measurement Time Real-Time Pressure Value | Maximum Value Minimum Value Differential Pressure Value Measurement Time Real-Time Pressure Value | Left/right real-time pressure, minimum, maximum, and front/rear pressure difference |
| Pressure Units | Psi Bar Kg/cm² | Psi Bar Kg/cm² | Psi Bar Kg/cm² | Psi Bar Kg/cm² | Psi Bar Kg/cm² | Psi Bar Kg/cm² | psi / bar / kg/cm² |
| Connections & Applications | |||||||
| Accessory Connectors | 10 Types | 18 Types | 17 Types | 31 Types | 3 Types | 12 Types | Check the selected package contents for included adapter types and quantities. |
| Equipped Toolbox | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Applicable Scenarios | Engine Cylinder | Engine Oil Circulation System | Automotive Fuel System | Automotive Fuel System | Fuel Injection Pump Pressure in the Automotive Direct Injection System | Automotive Transmission Pressure | Internal brake-system fluid pressure; two-position/caliper comparison |
Manual & Support
Find the Manual and Adapter Guidance
AUTOOL PT640 User Manual
Open the PDF manual for AUTOOL PT640 GDI pressure testing, unit selection, vehicle adapter setup, data hold and zeroing, safe depressurization and troubleshooting support.
Package Contents
See What Comes in the Box
- Main UnitAUTOOL PT640 GDI Fuel Pressure Gauge
- StorageCarrying case and product box
- ItemManual PT640 user manual
- AdaptersAdapter hoses, metal adapters, and T connector
- ItemPower 4 × AAA batteries required
Buyer Questions
Pressure Connection and Reading Questions
What Is AUTOOL PT640 Used For?
AUTOOL PT640 is used for GDI / direct injection fuel pressure testing. It is designed to measure fuel injection pump pressure in automotive direct injection systems.
What Pressure Range Does PT640 Support?
PT640 supports a pressure range of 0-360bar / 0-5221.3psi / 0-367kg/cm². The overload pressure is 400bar, and the device alarms when pressure exceeds 355bar.
Which Pressure Units Can PT640 Display?
PT640 can display pressure in bar, kg/cm², and Psi. The unit button allows switching between these pressure units.
How Do I Release Fuel Pressure Before Testing?
Unplug the fuel pump fuse, relay, or oil pump plug, then start the engine until it stalls. Start it again 2-3 times, then disconnect the negative battery terminal before connecting the tester.
What Batteries Does PT640 Use?
PT640 uses 4 × 1.5V AAA batteries. Open the rear battery cover and install the batteries according to the positive and negative polarity marks.
What Is The Difference Between PT635 And PT640?
PT635 is a high-end fuel pressure gauge for broader fuel pressure service. PT640 is specifically positioned as a GDI fuel pressure gauge for automotive direct injection system fuel pump pressure testing with a 0-360bar range.
Why Should I Use The Correct Adapter?
The correct adapter helps connect the PT640 measuring probe securely to the vehicle’s direct injection fuel pipeline. Using an unsuitable adapter may affect sealing, measurement accuracy, or safe connection.
Does PT640 Include A Manual?
Yes. The PT640 user manual is included in the package image and can also be downloaded from the Download section of this description.
Donahue Wood ✓ Verified Purchase –
PT640
The measurement range is wide, the readings are easy and clear, and the quality of the product is excellent!
Arlen Jerome ✓ Verified Purchase –
The item arrived in a timely manner, well packaged, and was just as described.
The item arrived in a timely manner, well packaged, and was just as described. Great seller!