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service engine light - fault code P0301


john43
08-13-2006, 12:55 PM
I have a 2000 Tacoma 4 clynder truck, service engine light is on with fault code P0301 on the diagnostic which indicates ignition problem in cylinder 1. I have replaced spark plugs and the combination coil/injector unit for that cylinder. I cleared the fault code and it returned. Truck runs slightly rough on idle. Fuel filter was also replaced. I also used injector cleaner addative to the gasoline. The wiring looks very complex to replace.
Anyone have any other suggestions before I spend alot dough at the dealer???

Brian R.
08-15-2006, 01:14 AM
Welcome to the AF!

Here's a troubleshooting chart for a 2RZ-FE/3RZ-FE. Hope this helps (Links go to http://www.deserted1.com/FSM/
Repair Manual 1, Diagnostics):

http://i16.photobucket.com/albums/b8/rogersb/2VZ-FE%20DTC%20P0301/2RZ-FE-P0301-1.jpg

Brian R.
08-15-2006, 01:14 AM
http://i16.photobucket.com/albums/b8/rogersb/2VZ-FE%20DTC%20P0301/2RZ-FE-P0301-2.jpg

Brian R.
08-15-2006, 01:14 AM
http://i16.photobucket.com/albums/b8/rogersb/2VZ-FE%20DTC%20P0301/2RZ-FE-P0301-3.jpg

Brian R.
08-15-2006, 01:14 AM
http://i16.photobucket.com/albums/b8/rogersb/2VZ-FE%20DTC%20P0301/2RZ-FE-P0301-4.jpg

Brian R.
08-15-2006, 01:14 AM
http://i16.photobucket.com/albums/b8/rogersb/2VZ-FE%20DTC%20P0301/2RZ-FE-P0301-5.jpg

Brian R.
08-15-2006, 01:15 AM
http://i16.photobucket.com/albums/b8/rogersb/2VZ-FE%20DTC%20P0301/2RZ-FE-P0301-6.jpg

Brian R.
08-15-2006, 01:15 AM
http://i16.photobucket.com/albums/b8/rogersb/2VZ-FE%20DTC%20P0301/2RZ-FE-P0301-7.jpg

Brian R.
08-15-2006, 01:15 AM
http://i16.photobucket.com/albums/b8/rogersb/2VZ-FE%20DTC%20P0301/2RZ-FE-P0301-8.jpg

Brian R.
08-15-2006, 01:15 AM
http://i16.photobucket.com/albums/b8/rogersb/2VZ-FE%20DTC%20P0301/2RZ-FE-P0301-9.jpg

Brian R.
08-15-2006, 01:15 AM
http://i16.photobucket.com/albums/b8/rogersb/2VZ-FE%20DTC%20P0301/2RZ-FE-P0301-10.jpg

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