Buying guide
Fuel Pressure Testers
Our pick
Equus 3640
Choose the Equus 3640 for checking gasoline fuel-injection pressure on a vehicle with a Schrader-valve test port.12
Why this one
- The Equus 3640 fits port, sequential, multi-point and throttle-body injection systems equipped with that test port, making it a useful choice across those connection-compatible systems.1
- Its 100 psi gauge and pressure-relief valve let you check pressure within the gauge range and release it after the reading.2
Before you buy: The Equus 3640 is for gasoline engines, not diesel fuel systems. Check its manual’s vehicle applications and adapter instructions before connecting it.12
The alternatives
Other contenders
For GM throttle-body injection with a threaded connection at the fuel filter or throttle body, choose the OTC CP7838.3
Buying advice
Compare the options
5 products
Compare models side by side
Choose two or three products to compare.
Models in this comparison
Every specification for these products
| Specification | Equus 3640 | Actron CP7818 | Bosch Diagnostics FIX 7818 | OTC 5630 | OTC CP7838 |
|---|---|---|---|---|---|
| Maximum gauge pressure | 100 psi2 | 100 psi4 | 100 psi5 | 100 psi6 | 100 psi7 |
| Fuel systems it fits | All electronic fuel injection systems (port, sequential, multi-point, throttle body), which are equipped with a fuel pressure test port (Schrader valve)1 | Ford high pressure central fuel injection and GM, Ford, and Chrysler multi-port fuel injection4 | most domestic fuel injected vehicles having a Schrader valve test port on the fuel rail. This includes Ford high pressure central fuel injection and GM, Ford, and Chrysler multi-port fuel injection5 | most domestic fuel-injected vehicles that feature a Schrader valve test port on the fuel rail6 | GM TBI with threaded connection at fuel filter or throttle body3 |
| Adapters included | Not published | Not published | Not published | Not published | Not published |
| Pressure relief valve | Yes2 | Yes4 | Yes5 | Yes6 | Yes7 |
| Gauge hose length | Not published | Not published | Not published | Not published | 40 in3 |
| Case | No8 | Not published | Not published | No9 | Not published |
| Brass fittings | Yes2 | Yes4 | Not published | Yes10 | Not published |
| Diesel use | No2 | No4 | No5 | No6 | No7 |
| Flex fuel use | Not published | No4 | Not published | Not published | Not published |
How they compare
Scroll the table to see every product and specification.
| Specification | Our pickEquus 3640 | Actron CP7818 | Bosch Diagnostics FIX 7818 | OTC 5630 | OTC CP7838 |
|---|---|---|---|---|---|
| Maximum gauge pressure | 100 psi2 | 100 psi4 | 100 psi5 | 100 psi6 | 100 psi7 |
| Fuel systems it fits | All electronic fuel injection systems (port, sequential, multi-point, throttle body), which are equipped with a fuel pressure test port (Schrader valve)1 | Ford high pressure central fuel injection and GM, Ford, and Chrysler multi-port fuel injection4 | most domestic fuel injected vehicles having a Schrader valve test port on the fuel rail. This includes Ford high pressure central fuel injection and GM, Ford, and Chrysler multi-port fuel injection5 | most domestic fuel-injected vehicles that feature a Schrader valve test port on the fuel rail6 | GM TBI with threaded connection at fuel filter or throttle body3 |
| Adapters included | Not published | Not published | Not published | Not published | Not published |
| Pressure relief valve | Yes2 | Yes4 | Yes5 | Yes6 | Yes7 |
| Gauge hose length | Not published | Not published | Not published | Not published | 40 in3 |
| Case | No8 | Not published | Not published | No9 | Not published |
| Brass fittings | Yes2 | Yes4 | Not published | Yes10 | Not published |
| Diesel use | No2 | No4 | No5 | No6 | No7 |
| Flex fuel use | Not published | No4 | Not published | Not published | Not published |