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My V70 MK2, 2.4 petrol, 125kW, y2001, engine code B5244S, has very heavy problem with engine start. Very smoke and engine shuts off on from idle run.
In the next phase of troubleshooting I pull out fuel ramp with injectors, and I tried start engine. First and third injector 2-3 time squirts on at the beginning. Then nothing. (the first is from the front view is on the left side. From camera view on right side). Here is low quality video
At first I test cable, I tried change connector between injectors each other . I did the test with bypass wire ECU-to-injector. Ìnjectors are good, wires is good. The error kept repeating itself on ECU pins for first and third injectors. I was convinced that it was a mistake of ECU. I bought another used ECU and I had cloning done. But the fault keeps repeating itself!
I consider it impossible that two ECUs are equally damaged. Now I think that the fault is in some sensor important for timing. A engine has Crankshaft Position Sensor and Camshaft Position Sensor (and??). Please, can someone give me advice which sensor is input for injectors signal? Or, what else should I check?
The first thing you should do is scan the control units with a compatible scanner. Then develop a rational diagnostic process if there are clues in the codes you get. At this point I trust you "think" there is a problem with the injectors and are spinning in your head trying to figure out what that might be.
I understand. I have chinese VIDA DICE 2014D, but I have not seen any usefull resul of test . But I will try to do the diagnosis again tomorrow.
I ruled out a fuel pressure error, when I tried change connector from injector. For example, connector from injector No.1 I connected to injector No.2. Injector No.2 stopped working and vice versa. The injectors don't work properly, but they don't work randomly. That's why I thought the ECU was bad. Now I think that the ECU is receive bad inputs. Bad position sensor, or magnetic/toothed ring.
I tried VIDA diagostic today. But I'm none the wiser. I am not a skilled user of the VIDA. I don't know which live data to watch. VIDA did not find any problem with the ECU and engine side. I tried all tests in VEHICLE COMMUNICATION/ADVANCED for ECM, and all are with no problem. Which one is log file? I found log files in c:vida/system/log/diagnostic, but that files contains very unoverview data.
The engine starts very badly. If I am quickly pumping the accelerator pedal maybe 2 minutes, then the engine keeps idling and seems to work normally. Engine reacts slowly to press the accelerator.
I measured the petrol pressure on fuel ramp with a manometer. It is 4 bars.
Some recommendation/idea?
Some recommendation/idea? Engine reacts slowly to press the accelerator.
Yes - note there are no ECM or ETM codes - but there is a CEM code for communication with the ETM. Click on that code and follow the diagnostic suggestions VIDA has. That might guide you to a solution. And under Vehicle communication, click on the ETM module and under advanced run the ETM test. (pictured below, my modules are all grey because I'm not plugged into a car). I trust you are aware that the Magnetti Maerelli (sp) throttle module used on your cars - have a 100% failure rate. How old is yours? If old I would suspect that to be a problem.
Clear all codes and see what comes back.
If you need a throttle module they are coded to the VIN of the car. Some have reported getting used ones to work - I have never tried. If you install a new one - that requires a software download using a VIDA subscription to make it work in any car (your stolen/hacked 2014d can't do a software download).
I have used xemodex in canada hundreds of times for module repairs. For most modules they will program it for your VIN at their factory. A download is not needed. I know that's not close to you in eastern Europe. But here's a link for info. https://xemodex.com/us/electronic-th...etm-for-volvo/
Perhaps there is someone closer that performs the same service - That is convert to non contact potentiometers in that style throttle housing, and program a different Throttle module to your VIN if needed. .
I cannot do the ETM test, because the version of my VIDA is older than ETM. That's what VIDA tells me. However, I disassembled the ETM. I opened both potentiometers. Potentiometer Thick Film Resistor and wipers are fine. I checked them with a magnifying glass. I checked the resistances with multimeter during the folding of the flap by hand. The values are +/- the same as in the PDF http://www.ip-wizards.ch/volvo/VEXED...arelli-ETM.pdf I didn't find a dead spot on the path of the resistance film.
I also watched the live data while the engine was running. In my opinion, ETM does not show errors. I take back what I wrote before that the engine reacts poorly to pressing the accelerator pedal. When I start the engine with hard work and it warms up a bit, then it works normally. Hold the idle. Don't smoke. However, if I remove the fuel rail from the warm engine and try the injection test using the starter, the injectors still behave strangely (first post). I'll admit that it's not a correct test, but I still can't find a reason why some injectors should work normally and others not.
I wondered if the problem was not the electronic choke mode. A friend told me that it could be the knock sensor. It's all blind shooting. I can't buy one part after another. I don't know what to focus on when watching VIDA, because the engine works normally when warm.
problem with petrol injection
