Mitsubishi Lancer poor starting

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Mitsubishi Lancer poor starting

Postby victor2k » Sun Sep 10, 2017 5:28 pm

Hello,
I have now for tests a 2009 Mitsubishi Lancer 2.0 diesel/BWC engine type with poor start.
In ESI I can't find the needed infos,the wiring diagram from equvalent A4 doesn't fit to my car.
No faults in ECU,no warning light in dash.No increased oil level.
For the first time I checked camshaft vs crankshaft , injector current(I used for reference BKD engine type ).No timing error can be found.
At the second check I used the crankshaft signal,injector 1 current,WPS in exhaust and WPS in tandem pump port.At this level I think only one or two injectors(3 and 4 -according to the math of freq(a)) will spray diesel in cylinder in the first 3-4 seconds of starter engagement.Also the tandem pump pressure is too low when the engine start,on the return line only 30-70 mBar!
At the third check I recorded the crankshaft signal,injector 1 current and fuel priming pressure.Here I can see a low value of the pressure when engine is started,also a negative value (-160 mBar )at 1750 RPM.This is a sign of fuel filter ,pipes clogged or at the high speed the tandem pump not need the support from electric fuel pump?
Someone have a full test for a working electric pump:ignition on,starting,idling and WOT?
Thank you.
Attachments
Mitsubishi_Lancer_2009_Diesel_exhaust pressure waveform.psdata
(11.8 MiB) Downloaded 17 times
Mitsubishi_Lancer_2009_Diesel_electric fuel pump.psdata
(7.36 MiB) Downloaded 17 times
Mitsubishi_Lancer_2009_Diesel_TANDEM PUMP PRESSURE.psdata
(14.16 MiB) Downloaded 15 times
Mitsubishi_Lancer_2009_Diesel_CAM VS CRANK.psdata
(7.11 MiB) Downloaded 14 times
Mitsubishi_Lancer_2009_Diesel_Return pressure.psdata
(7.14 MiB) Downloaded 12 times
victor2k
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Re: Mitsubishi Lancer poor starting

Postby victor2k » Sat Sep 16, 2017 5:45 am

Hello,
Here is a new capture with the pressure from tandem pump at 4690 rpm,according to the repair manual is a good value(1050KPa at 4000RPM).
Regards
Attachments
tandem pump pressure at 4689 rpm.png
victor2k
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Posts: 168
Joined: Thu Jan 28, 2016 9:17 am


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