430 Continuing O2 Sensor Saga - Ignition Coils? Fuel Rail?

Thought I'd continue my other thread with one that has a more appropriate title. For some more background I've attached the other thread link:
https://www.ferrarichat.com/forum/threads/bad-new-o2-sensors-ignition-coils-fabspeed-headers-oh-my.659272/

Update. I finally found time to swap the new O2 sensors from one side to the other. I then took it through the smog reboot checklist, for at least a total of 30 minutes of driving. The car drove great outside of an odd idling when I got back, although thinking back the idle seemed low upon startup. Codes remain unchanged, and added some.

I've browsed some other threads regarding the codes below which lead me to consider some potential causes.Probably explains the misfire code; but I'm not sure what caused it and if it's related to the O2 sensor issue. Could it be the coils causing this? Maybe fuel pump or fuel tube? I've already replaced spark plugs 2 years ago (about 2k miles ago).

Also it seems like the car is switching between P0051 to P0050 from what I can tell on my code history.

Can't decide if I should go ahead and replace left hand fuel pump, fuel tube (rail?), and ignition cables, or take it to an indy shop where I'll probably spend nearly as much on labor as I would replacing all of those parts from the Eurospares website.

Anyone have any thoughts? Old is new O2 sensors where originally installed. New codes are by swapping sides.

Old Blue Driver Codes:

• P0056 O2 Sensor 2/2 Heater Circuit
• P0051 O2 Sensor 2/1 Heater Circuit Low

New Blue Driver Codes:

• P0056 O2 Sensor 2/2 Heater Circuit
  
• P0051 O2 Sensor 2/1 Heater Circuit Low
• P0308 Cylinder 8 Misfire Detected

Autotel Old Codes:

• P1611 Permanent Power Supply [Cylinder bank 2]
• P0056 Rear Lh Lambda Sensor Circuit
• P0050 Front Lh Lambda Sensor Circuit

New Autotel Codes:

• P1611 Permanent Power Supply [Cylinder bank 2]
• P0056 Rear Lh Lambda Sensor Circuit
• P0051 Front Lh Lambda Sensor Circuit
• P0300 Multiple Misfiring
• P0308 Cylinder 8 Misfire

 

All four are new. One from the dealer, 3 from other vendors. That's the reason I swapped sides, to make sure it wasn't an issue with the sensors themselves. It's not looking like it since I have the same O2 error codes from the same side.

 

Would it help if I posted it on here? Not sure I’d know what to do with the info.

Btw I’m waiting on that accumulator to show up, will be giving you a call soon to chat!

 

I do not have a compression tester, I can probably order one though. Great recommendations, although I may have the shop manage that. My project started up again, so I'm back on seven day weeks and I don't get much time at the house anymore.

You're right, fuel pump isn't really attributed to this, I just had it on my buy list as something I planned to replace anyway. The fuel tube was what I'd considered a possible issue since another thread discussed the misfire code that ended up being the fuel tube.

 

Unfortunately, I do not.

 

One is Ferrari OEM, two were Bosch ordered from Rock Auto, and one was Bosch ordered from Advanced Auto parts.

Hope to get a chance to do that this weekend, will then post it.

Great info, may have the indy give that a shot. Mine's an 05 too, so could very well be the issue with mine. Only thing is that it happened to do it right in the middle of my o2 sensor test. I also may need to check and make sure everything got sealed properly when I reinstalled the parts in the intake area.

Thanks for sharing this, very useful! I'll add that to my things to check when I get back in there.

 

I think this saga is coming to an end. I'm picking up the car today from the shop and we think the issue is resolved. This is what they did:

• Fuses PDF4 & PDF24 were found to be blown, and were replaced. This appeared to resolve an issue with the O2 sensor's CEL.
• This may or may not have been tied to the issue since the O2 sensor light went off after addressing the fuses, but the intake gaskets were replaced to resolve a cylinder 8 misfire and rough idle
• compression test was done, and returned normal with no issues
• Spark Plugs were replaced between fuse replacement and gasket replacement

I haven't picked up the car yet, but I spent a pretty penny on it so I hope it's resolved.

 

Thanks! Although now you have me nervous again, lol. They say the CEL lights aren’t coming back on, and when I did all the swapping of the O2 sensors the lights would come on pretty much immediately. So I’m optimistic about that. Right now the car is scheduled for a mini-detail and I should get it back Friday so I can drive it around this weekend and make sure it’s cycling properly and can pass smog.

If it doesn’t, I think my next step is to return the ECU to stock, and either get another set of O2 extenders or return the car to stock headers and sell it. All I know is that the car had no issues with the O2 extenders and stock ECU, until the O2 extenders started falling out continuously. Unfortunately the extenders becoming permanently loose and falling out, and the ECU upgrade happened at about the same time, so it’s hard to tell if either of those had an impact or if it’s just a coincidence. It’s frustrating because otherwise the car has been running great, and the ECU tune was an improvement.

 

Thanks for the offer. I think this is going to do it though. Actually, it might have been your posts on the intake manifolds that sent me in that direction (if so, much appreciated!). I was reading a lot of info here on the site and came across that scenario, which is why I wanted them to do a smoke test and check them.