Thanks in advance, this by far best community I've ever been apart of. Now I post a picture with everything but I've already replaced MAF, Plugs/coils, amd all of that was because of other codes amd things which ultimately I've replaced the high pressure fuel pump/ fuel pressure sensor + all ^. I need help but I did just read about a injector driver thing I somehow didn't even know existed so I got to look into that but any help would be great please n thanks!!

Would you think actual injector wires? Maybe the injector? Or the injector driver \" that i learmed about wjile making this post 😂. Thanks guys!
thought I should add I'm about to just go for it because i already took it back apart down too thr fuel rail just to be sure. If it'd fairly obvious ivvle probably did it but mayb not I'm open ears

 

I would assume this is for the Port Injector vs direct injector circuit but that needs verified. You need a couple of things.
Schematics. Either from Toyota TIS site or something like www.alldatadiy.com.
A DMM with ohms setting and some very tiny probes.

With these items I suggest you compare say cylinder 2 to cylinder 4 port injector pins. Take your notepad and right down the ohm values for each pin. Measure pin 1 to ground for both cylinders record value. Move to next pin and repeat. Now look at schematic and follow the wires that have different values.

You'll want to do the same for the injectors. IMO the driver is likely not at fault and a wire is loose or broken likely at the injector or driver.

Driver goes to the injectors. ECM talks to driver so these connections may need ohmed out if nothing stands out.

Make sense?

 

Yes that makes sense, and I'll still go ahead and do that probably. Before I ever saw your response (my fault) I already got new injectors and installed them. I just did that yesterday, I haven't put it all back together yet, thanks for your response!

I knew even though i believe what you were sayjng is along the path that i will end up on, at 185k i figured what could it hurt.

 

That looks rather awful! How long have you had it did it ever have injector cleaner ran through it? I try to do it 3x to 4x a year as the seasons change. The reason being, transportation tanks sweating and moisture contamination.

GL

 

I've had it about 8 or 9 years. Ive definitely not done itnthay often probably should have been but reallybi didnt know the first couple years and then the rest I usually done it 1 mayb 2 times a year but I'm definitely going to be making it a much more common thing. I've basically got it all together and I'm gonna go back over male sure everything is right amd give it a shot tomorrow. Thanks for alls input!

 

Not a great day. So replace the admittedly awful injectors putting it together and trying To sure everything is right... I start it up and it'd an extremely big difference in how it runs, compared to before, id drive it it was smooth enough but it still has misfire random amd the main issue for me is the PO204 still there but I'll post the codes and a freeze frame while it was running. I'm going to go inside and hope that someone one of you wonderfully smart people give me something because I'm about to flip out n sell it to the scrap yard 😂
One note I'll add is. The cars been sitting awhile and of course when I started it it was blowing white smoke out tailpipe but then seemed to stop, my daughter (who's 8years old but happen to be sitting with her friend in the yard a ways back from the car) yells to tell me the white smoke stopped on my side (driver) but had it coming out of the other side still? Anyone with any sort of idea imput I'm grateful for, thankyou all so much
ps: 07 is350 with some sort of issues but a great car other wise up for sale to the highest bidder literally.

 

 

Please return to post #2. You need to compare cylinder 4 to any other cylinder but #6... DMM, test leads, Notepad, Pencil, unplug #4 injector and ohm each wire harness pin to ground writing down the results for each location. Now do the same to #2 in the same exact order on the connector and compare them. Find what is different and follow it to resolution. Likely a pushed pin, broken wire, or something like that. It says it detected an open. I suspect it is correct. Lightly pulling on each wire could confirm integrity if one pulls out.
The key objective is to verify continuity between the injector plug and the injector driver. Maybe even compare two good cylinders to #4.

I'm pretty sure most of the pins from the injector go right to the driver module on the front of the engine.

I think this could be done in 20 minutes once the intake is off.

 

I've still put off taking the intake back off just because it's been cold still mostly but I've gotten a little but farther forwards or maybe backwards hard say 😂