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?

Kyle Shaw

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


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

Nick Eidemiller

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

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