Help needed P0304 persisting

[YJ351LC]

Got a flashing CEL, VSC OFF, and TRC OFF, with a misfire on the #4.

Codes were:
P0440 (Repeat offender since I purchased it last July)
P0300
P0304
P0307

As of posting I have done the following
8 new plugs
8 new coil packs
4 new O2 sensors

Waiting on a new fuel injector for #4 (part on order)

Have cleared codes and now am only getting
P0304


What else could be driving this problem?

 

[Trunk Monkey]

Added more deets to your title. Check voltage at the coil pack wiring maybe.

 

[YJ351LC]

Added more deets to your title. Check voltage at the coil pack wiring maybe.

Good voltage

 

[YJ351LC]

Final update!

I pulled the number 4 fuel injector and put a new one in.

That was definitely the problem.

Thanks to all for the help!

 

[BullElk]

Final update!

I pulled the number 4 fuel injector and put a new one in.

That was definitely the problem.

Thanks to all for the help!

Where did you get the one injector? That may be my #5 problem.

 

[YJ351LC]

Where did you get the one injector? That may be my #5 problem.

Autozone

 

[e46jab]

Bumping an old thread. Do you have a DIY on fuel injector replacement and part number for injectors?

 

[Kamran Khan]

Fuel Injector part number

23209-50080​

And how to replace it, check this.

 

[e46jab]

Fuel Injector part number

23209-50080​

And how to replace it, check this.

Thank you!!

Edit: When I look up that part number it says it does not fit a 2003 LC (says 2004+) however there is no difference in 2003 and 2004 LC engine...

 

[Kamran Khan]

Thank you!!

Edit: When I look up that part number it says it does not fit a 2003 LC (says 2004+) however there is no difference in 2003 and 2004 LC engine...

Fuel injector part number for LC from 1998 to 2002 is 23209-50040.

However, this part number 23209-50080 will also fit your car, even though it shows that it's not for your car. In later model cruisers, Toyota started to use fuel injectors with more holes in the nozzle.

 

[e46jab]

Thanks again!

 

[2001LC]

23209-50040 98-05
23209-50080 06-07 (VVT engine) Does not have top grommet.

 

[Kamran Khan]

23209-50040 98-05
23209-50080 06-07 (VVT engine) Does not have top grommet.

Thanks for correction. I just looked at the pictures of both injectors online side by side and I noticed that the connectors are also different.