you need reliable data in order to diagnose. So you will need to figure out a way to get that. You are either lacking spark or fuel or both when the car runs on 4. You need to figure that out first otherwise you are guessing at possible causes hoping to get lucky.
Yes, of course. Its very simple. It does not misfire. The whole bank is dead (if my teory is correct), and thus the ECU is not reading anything. Its just starting up a few secs after the other bank.
Im fully aware of that. However, I think I have gathered more reliable data than most before on this issue. My next step is the following: Start the car, run it for a few secs on what I think is only one bank. then i will IR gun the exhaust ports to check which cylinders have fired. Should get a fairly good indication if a whole bank is missing, and if so, which one...
I was under the impression that each ECU monitored engine speed, and detected misfire based upon RPM change between two anticipated firings. In other words, I thought that two adjacent events defined misfire, regardless of what happens afterwards. Perhaps I'm missing something; maybe my brain needs a reflash (The graph below is for a Bosch ME7.4.4 ECU; the 360 uses an ME7.3) - - Image Unavailable, Please Login
I will revert after I determine if it actually is starting up on just one bank, and if its the same bank every time. In the meanwhile, I think the answer to your question is that each ecu stores the misfirecodes for its own bank only. The engine ECUs are set up like two 4cyl engines.
I don't know how quickly a misfire will result in a code or CEL activation. I've had misfiring issues on a couple of times on my 2000 Euro 360 and never had CEL or stored codes as a result. Perhaps it has to misfire for an extended period of time or is only measured above certain RPM or something along those lines. I certainly don't think it's instantaneous anyway.
Nope, still the same....... Having said that, I havent used the car too much lately. Both my 360 and the 430 is acting up.... haha, always something.
That would be my first port of call followed by the relays. There's another thread on here where this issue has been resolved with a fresh battery. These cars really are sensitive to weak batteries.
Mine has a new battery. Bosch. Charging system all in order. Always kept on a Ctek when not in use. The problem remains.
Just as an update, I have a thread on one of the other F-forums, which have been running since 2008 in fact. Another member there had a similar issue, and it was rectified by swopping the ignition ECUs left to right side........ Go Figure. I will try this swopping over the ECUs when I get home towards the end of May.....
Hey Kevin...get off the forum and drive that thing will ya?? I've put 6000 on mine since last August when I bought it! Cheers!! Ps : or is that 1,006,000???
I tried swopping the ECU's left to right. No change at all. Next check: -I have now bought a 2nd fuel pressure tester, so I will have a pressure gauge connected to each bank during start-up to see if there are any differences..... The saga goes on.
Ok, I have now done the startup with 2 fuel pressure testers connected. One to each bank. Both banks prime up the fuel pressure to factory specs when the ignition is turned on. Both banks hold the same fuel pressure during cranking and start up. No difference in Fuel Pressure left to right. The mystery continues.
Do you think the relay for ECU on the one side that isn't running might be sticking or not engaging on startup immediately? If you switch the ECU relay from side to side.. do the symptoms follow? Relays 55 and 88?
Has anyone: 1) Disconnected their 360 battery, and left it disconnected for a while 2) Found that the engine runs very rough upon restart 3) Allowed the engine to run roughly, and found that the engine resumes normal operation after a few minutes?
Did you go through the learn process. The engine management system needs to go through a learn process. Happens every time you disconnect the battery.
From your statement above, I infer that you have had the same experience as me. Yes, the injectors go into "learn mode" after power has been disconnected (and left disconnected for a while); see my post (#33) in this thread. When power is disconnected, the ECU loses electrical potential, and the injectors go into learn mode, on the next start-up. At start-up, I believe that the injection time defaults to maximum, as a result of the lost potential. I can explain, if anyone is interested. In post #35, the OP states that the engine runs the same (i.e., it runs poorly) after leaving the battery disconnected over night. That makes sense to me. Because in either case, I believe that the ECU is losing potential, and the injectors are going into learn mode. If you buy the theory that the ECU is losing potential in either case, the question becomes "How does the ECU lose potential without disconnecting the battery?" If anyone is interested, I'll post my answer to the question above.
This is the procedure after battery has been disconnected / replaced http://www.ferrarichat.com/forum/attachment.php?attachmentid=1458653&d=1327817612
Thanks. The procedure given in the FWM (see Post #33 of this thread) has always worked fine for me. Perhaps I should mention that the OP of this thread is not having a problem with reset. His problem is that the car runs poorly upon start-up, after an overnight cold soak. My WAG is that the ECU is loosing potential, causing the injectors to go into learn-mode upon start-up.
