Engine optimization Volvo V50 2.0D
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I had exactly the same problem - Rica chiptuning helped me!
https://rica.nl/en/chiptuning/tuning-options/ -
@sizan I understand what you mean. Uneven combustion under constant or no load. This is usually caused by low fuel pressure, worn injectors, leaks or massive carbon build up in the intake . Did you already do basic things like clean the MAF and MAP sensors? Replacing the fuel filter? Use something like this
to check the injectors?
Bad software could also be a problem, but the last thing I would suspect. Tuned/modified software should also trigger a DTC for a checksum error in the ECM.
If you want to flash other software anyway, you will need a good charger, a good adapter like the Super J2534 and maybe the ECM pin, if this engine already has that. The CEM pin is not needed for flashing the ECM. -
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@Arnis2002 With checking injectors I mean performing an injector fuel return test, which can also be seen in the picture I posted. This simple test consist of unplugging the small fuel return hoses from the injectors, and watching and comparing the amount of leaking fuel of all 4 injectors while the engine is running. This simple test is an indicator to diagnose worn injectors, and can be easily done without removing them from the engine. Every professional mechanic I know, would do exactly this test together with a smoke test of the whole inlet, based on the symptoms reported.
Installing tuning software without doing a proper diagnose to fix potential engine problems is a somewhat special suggestion.
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@T5-T6-Schnappi said in Engine optimization Volvo V50 2.0D:
Installing tuning software without doing a proper diagnose to fix potential engine problems is a somewhat special suggestion.
these are the consequences of improper DPF and EGR shutdown!
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@Arnis2002 my current understanding is, that it's unclear if the car was remapped or not. If this is the case and the car was tampered by one of those wannabe tuners that think running crap like autotuner, which offers stolen software packages without checking if the software works or even matches the vehicle makes them a good tuner, then I agree with you. Return to 100% original software and then flashing a properly done remap based on that is the way to go. If this has to be done from one of the most expensive Volvo tuners around is another question.
The tunes offered by Vdash are made by Obbe-Tuning, and this guy also knows what he's doing, but for much less money.
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@T5-T6-Schnappi checked everything, i mean everything. the card was already bought with DPF off ( he even received another ECU ( ecm ? ) , i dont know what's with that yet ) .
the car works perfectly, except for that problem I was talking about. I found out now that it only has DPF Off, EGR is not off, he doesn't know who made the software part for dpf off, but after all the checks he didn't find any mechanical cause for the problem, only the software part remained.
tomorrow I'm going to him and I'll do another check with vdash.
the question is, if he chooses to put software ( ORI + DPF Off) how do I proceed? any advice, is there anything else I should take into account? is there any way I can save the software that is now on?
thanks a lot !
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@sizan Is the DPF also physically removed from the car?
You should also check if the correct injector class is set in the ECM, before you try different software.
Another stupid question. Does the VIN that is reported by the CEM/shown in Vdash match the VIN that is stamped in the chassis?Vdash has a backup/clone function. So it should be possible to make a backup before flashing different software. The button is somewhere in the top right corner between "configuration" and "Ecu diagnostic", after the car is connected.
Attach a really good charger while flashing/backup.
When the programming is done, shut off the car and leave it alone for a while. And be prepared that the car might not start at the first attempt after flashing. This is normal on some cars.
On some cars you also need to reset the ECM adaptions after a flash. I can't tell you if this required on this specific engine.
