Put in a new injector in cylinder 3. Car doesn't run right I if I unplug the injector there is no change and engine Rhythm or pitch. Not the same case for the other cylinders what's the issue?

Asked by Apr 02, 2014 at 07:04 PM about the 2002 Subaru Impreza WRX Base

Question type: Maintenance & Repair

2002 subaru wrx 2.0L flat four boxer. 164k miles. New plug, new
injector, new o2 sensor, and good coils

2 Answers

65,035

Compression test that cylinder. Could be a bad valve. Also pressure test the cooling system. With your cooling system pressurized start the engine. If the needle on the pressure tester gauge bounces you've got a blown head gasket. If both these tests are ok, using a 'noid light check that the injector is getting the trigger signal to spray fuel. If not, check the wiring going to that injector. HTH. - Jim

6,155

Also check the spark plug, plug wire, and ignition coil pack.

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