Auditrigger on a inline 5 cylinder Audi engine,but now only with distributer,and 1 coil.
After 16 hours of hard work we tried to start the engine.Everything looked great,we had RPM signal during cranking,we had spark (at the right cylinders),and injectorclicking too.Unfortunately the engine did not fired up,after 4 hours of continous problem searching,we did not found the cause of our sadness.We tried different ignition and fuel settings.I also realised that the car dont really want to pull vacuum under cranking (in the vems,map sensor),tough i can feel it with my hand.(no plumbing,only throttle body).Note that the car was running in the past with dual K-jet without problems.We also checked Compression in the cylinders,and they are good.
- firmware 1.0.30
- [tables ]
- [config]
- mdd0c logs (zipped together) http://www.vems.hu/files/MembersPage/NanassyPeter/ClonInstallStartUp/mdd0c_logs.zip
I formatted the binary logs with /svn/firmware/utilities/vemslogger/auditrigger_logformatter <mdd0c_3.log >mdd0c_3.txt and watch:\nÿ1ÿ
The offending crankhome VR pulse typically comes after 1 crank rotation (==0.5 cam rotation, 2.5 events) instead of 2 crank rotations. So that means : check your cam-HALL ! that is responsible to mask every second crankhome VR pulses
- does the HALL get supply ?
- Is it connected at all ?
- maybe cam-HALL position is rotated so the crankhome VR signal is not masked out ? The cam-HALL should be active (pull down to GND) at the same time when the crankhome VR comes! This is important to check
- what voltage do you measure on EC36pin13 ?
- when engine off, but power on: likely 4V or so (0V also possible if the HALL is just at the window) => goes in between when engine rotates. Measured mean (DC) voltage should change something like 4V => 3.9V when engine starts to rotate because the HALL pulls down 1/40 of the time.
- Don't try HALL 5-window yet. Make the 1-window CAM-HALL work.
- Don't invert crankhome VR polarity. It's likely good. When the CAM-HALL is working, we can tell for sure
It's good that you published config and mdd0c logs. After trigger hammered, don't forget
- take logs with MegaTune (remember to say bye after fiddling in Man mode, taking mdd0c log for example).
- we'll watch for fuel pulsewidth (possible fuelcut due to TPS>60% floodclear at cranking or kPa fuelcut, whatever...). I checked this,there is PW
- is the ignition right where you like ? Do you have a lamp? I remember this engine has a custom crankhome VR position, a few degrees off.
- if it's just 2 degrees or so, the normal procedure of varying trigger tooth or ign_tdcdelay should work well
- is the fuel system working ? fuel pump, fuel pressure ?
- Sure, its working,there is a LOT OF fuel i the cylinders
- Is it possible to just ditch the camsync HALL signal and map the ECU for only crankVR signals?
- of course NOT. It has 5 cylinders, so from crank it's not possible to tell when to fire (even if it has distributor). With CDI and COP it might work firing twice as much (like a 10 cyl), but a lame solution
- however, the cam-HALL (the 3d trigger signal, EC36pin13) would work with 5 windows just as well as with 1 window. Just make sure the HALL
- is surely high for one of the crankhome pulse and (traditionally the 134BTDC cyl5)
- and surely low for the other crankhome pulse (traditionally the 62BTDC cyl1)
- whatever it is at other positions does NOT matter
Here the new logs with working HALL
http://www.vems.hu/filethingie.php?subdir=MembersPage/NanassyPeter/ClonInstallStartUp/workinghall
I noticed in MT under cranking that the RPM signal is silly,(goes from 0 to 30800,and the other signals fluctuates badly too)
Marceel i call you,can u please just ring my cell phone when u finished with this,and i call u back.thanks.