AUTOOL PT640 GDI Fuel Pressure Tester 0

AUTOOL PT640 GDI Digital Fuel Pressure Gauge Kit

Professional GDI Fuel System Diagnostic

The AUTOOL PT640 is a digital high-pressure fuel tester for petrol direct-injection (GDI) engines. Use it to measure the output of the high-pressure fuel pump and diagnose low rail pressure, weak pumps, faulty pressure sensors and regulators, which cause hard starting, loss of power and fuel pressure fault codes.

Its 0–360 bar range covers GDI rail pressures that a standard fuel gauge cannot read. The T-piece adapter lets you read actual pressure while the engine runs, and compare it with the value reported by the rail pressure sensor on your scan tool.

Main Features

High-pressure range: 0–360 bar / 0–5221 psi / 0–367 kg/cm², with 0.1 resolution.
1% FS accuracy: reliable readings for comparing against factory specifications and sensor data.
Over-pressure alarm: warns when pressure exceeds 355 bar. Overload limit 400 bar.
Max, min and differential values: capture pressure changes during acceleration and load.
GDI adapter kit: high-pressure adapter hoses, metal adapters and a T-connector.
Data hold and lock: freeze a reading so you can record it.
2.8-inch backlit display with switchable bar, psi and kg/cm² units.

Important Notes

For petrol direct-injection (GDI) systems only. Not for diesel common-rail systems.
Depressurise the fuel system using the manufacturer's procedure before connecting or disconnecting.
Use only the supplied GDI-rated hoses and adapters.
Requires 4 × AAA batteries.

Package Includes

1 × AUTOOL PT640 digital GDI pressure gauge with measuring probe
1 × GDI adapter kit (high-pressure hoses, metal adapters, T-connector)
1 × Carry case
1 × User manual

AUTOOL PT640 is a professional-grade digital fuel pressure testing solution

Feature	Benefit
0–360 bar range	Reads GDI rail pressures beyond a standard fuel gauge
1% FS accuracy	Verify the rail pressure sensor against a real reading
355 bar over-pressure alarm	Warns before the gauge's limit is reached
T-connector adapter	Read pressure with the engine running
Max / min / differential readings	Spot pressure drop under load
Backlit 2.8-inch screen	Readable in low light

AUTOOL PT640 high-pressure fuel system tester

AUTOOL Pressure Gauge Comparison

Comparison Table: PT640 | PT650 | PT660

	PT640	PT650	PT660

DISPLAY & STORAGE
Display Screen	2.8-inch	2.8-inch	3-inch
Data Storage	X	X	X
CONNECTIVITY & ACCESSORIES
Accessory Connectors	3 Types	12 Types	1 Types
Equipped Toolbox	✓	✓	✓
Dual-Channel Pressure Testing	X	X	Simultaneously Measure the Pressure of Two Brake Calipers
MEASUREMENT FUNCTIONS
Data Lock / Clear / Record	✓	✓	✓
Multi-Parameter Display	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	Maximum/Minimum/Differ ential Pressure Values for Different Calipers, Real-Time Pressure Value
Pressure Units	Psi, Bar, Kg/c㎡	Psi, Bar, Kg/c㎡	Psi, Bar, Kg/c㎡
PRESSURE RANGE
Pressure Range	0–360 bar	0–30 bar	10–210 bar
APPLICATION
Applicable Scenarios	Fuel Injection Pump Pressure in the Automotive Direct Injection System	Automotive Transmission Pressure	Internal Fluid Pressure of the Brake System
	LEARN MORE	LEARN MORE	LEARN MORE

AUTOOL PT640 GDI Fuel Pressure Gauge Kit

Application	Petrol direct-injection (GDI) high-pressure fuel systems
Pressure Range	0–360 bar / 0–5221.3 psi / 0–367 kg/cm²
Overload Limit	400 bar
Over-Pressure Alarm	Above 355 bar
Accuracy	1% FS
Resolution	0.1
Units	bar, psi, kg/cm²
Readings Displayed	Real-time, maximum, minimum, differential, measurement time
Functions	Zero, data hold, data lock, clear, record
Data Storage	Not supported
Display	2.8-inch backlit screen
Adapters	High-pressure adapter hoses, metal adapters, T-connector
Power	4 × AAA 1.5 V batteries
Not Suitable For	Diesel common-rail systems
Warranty	3 years main unit, 1 year accessories (manufacturer)

AUTOOL PT640 Technical Specifications

Delivery

99% of purchases are dispatched from our Melbourne warehouse within 24 hours of payment. Every parcel is shipped with Australia Post e-Parcel, complete with tracking and signature on delivery.

Need it sooner? Express shipping is also available—check if your postcode is in the Next Day Delivery network.

Returns

Shop with confidence. We offer a 30-day money back guarantee on all orders. If you’ve had a change of mind, simply return the item in re-original condition and we’ll make it right.

Warranty

All AZscanners products are backed by a 12-month warranty (unless otherwise stated). We stand by the quality of our tools and will repair or replace your item if a covered fault arises.

Buying your scan tool should feel easy, safe, and backed by a team you can trust.

That’s why thousands of mechanics, fleets, and car owners across Australia choose AZscanners. Here’s our promise to you:

Trusted Since 2013

We’ve been Australia’s go-to supplier of premium diagnostic scan tools for over a decade. From workshops and mobile mechanics to DIY users, we’ve built our reputation on quality, reliability, and real support.

30-Day Money Back Guarantee

Changed your mind? No problem. You have 30 days to return your item in its original condition for a full refund. It’s our way of making your purchase completely risk-free.

Quality You Can Count On

Every product in our range is hand-picked for performance, compatibility, and durability. Whether you’re after a professional-grade scan tool or an easy solution for home use, we’ve got you covered.

Local Support that Cares

We don’t just sell scan tools — we support them. Our team of technicians is here to answer your questions before and after purchase, so you’re never left on your own.

Fast & Reliable Shipping

99% of orders are shipped within 24 hours (from our Melbourne warehouse) with tracking and signature included. Need it quicker? Express delivery is available.