Fuel Injector Quantity Test
- Remove fuel rail, complete with fuel injectors, from engine. DO NOT disconnect fuel supply or return lines. Place fuel injector being tested into a graduated container. Using fused jumper wire connect one terminal of fuel injector to battery positive terminal.
- Using fused jumper wire connect other terminal of fuel injector to ground for exactly 30 seconds. Activate fuel pump. See appropriate fuel pump activation procedure under FUEL PUMP
. Fuel quantity should be as specified. See FUEL INJECTOR QUANTITY
table. If fuel quantity is more than or less than specification, replace faulty fuel injector.
FUEL INJECTOR QUANTITY
| Application |
Ozs. (mL) |
| A4 & S4 |
| 1.8L Turbo |
4.25-4.9 (125-145) |
| 2.7L Turbo |
4.5-5.5 (135-165) |
| 2.8L |
3.25-4.25 (90-125) |
| 4.2L |
3.25-3.9 (95-115) |