Audi RS2 with 7A flywheel trigger error

[billman]

Hi,

i installed the 7A flywheel but welded a thicker pin but still get trigger error above 6000-6500 RPM. Sometimes even at 2000. I have grinded the sensor mount a lot bringing it closer but still have the issue. The car starts everytime with no issues and i dont use the Hall inverter (i have the adapter cable from EFI-Express)

do you think that it is still the flywheel pin?

here some logs:

File name: v3.3_n001441-2011-10-01-14.32.36.triggerlog File size: 93.75 KB

File name: v3.3_n001441-2011.09.21-23.29.52.vemslog File size: 180 KB

[billman]

I also see in the log that the rpm read when the error occurs is inconsistent jumping from 6200 to 5900 and back.

Can the fault be on the engine speed sensor?

[GintsK]

If you have no Hall inverter it is strange if it is possible to get engine started!!

Inverter designing first cause was exactly 7A flywheel.

Gints

[billman]

hmmmm, interesting. This is maybe because i welded a thick pin. Look at the picture:



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[GintsK]

Search for 7A flywheel in wiki - it gives four unwanted signals per revolution. You definitely need inverter!

[billman]

please also note that my 7A flywheel is lightened so the noches on the backside are machined out.

ok, i am going to install it tomorrow. Right now i have the Primary trigger 66 degrees before TDC. how much should it be with the inverter? -8?

[billman]

I also don't have the hall dirac filter enabled on the sec trigger. On the first neither.

[billman]

I installed the inverter today and made a triggerlog on idle with some minor revving. does this look better?

File name: v3.3_n001441-2011-10-02-23.21.05.triggerlog File size: 12.5 KB

[AVP]

i had hall inverter from day 1 and with the 7A flywheel, it still wouldnt run unless the pin was rewelded and made bigger!

[billman]

I did it also. Should i maybe reduce the sec trig window from min 1 max 359 to something else?

[AVP]

i have it as 1-359 and i get no error on validation now

[billman]

I updated today to 1.1.96 and the validation error of sectrig min ange and max angle went away. I did not managed to try it out on the road yet.

I still have a question the RPM jumping up and down at high revs in the log have to do with trigger errors or Speed sensor errors?

[andreNL]

I have a simulair problem above 7000rpm ecu shuts down. I have to stop the car turn ignition off and restart vems and evrything is fine again. Below 7k no problem at all. But cant be  borderd now to busy for other things 

[jrussell]

The most common cause I've seen of high rpm error on Auditrigger has been the sensor is too far away from the pin. Either grind out some of the bellhousing so you can rotate the sensor closer to the ring gear, or make the pin larger.

[billman]

I did enlargen the PIN but now i see Less Pr. Trigger. Then trimmed the sensor so that it comes closer to the pin but i had no time testing it.

Then another thought came to mind. Since i have an audi stroker and using the 95.5 diesel crankshaft i could use the original diesel Crankshaft positioning sensor that sits on the engine block. On the crankshaft there is a metal plate that tuns and at one point there is a hole. Anyone knows how the VEMS settings should look like?