gave in and converted to audi trigger VEMS and still trigger problems

[vwnut8392]

well i gave in to running audi trigger on my and canned my 60-2 setup. even though im on my factory sensors now that most definitely worked with the stock ECU im having trigger problems. i cant win with trigger error's. anyhow, the car will start and idle with no trigger error's and than if you try to rev the car it says tooth length error and than it proceeds to say less sectrig while on throttle. when i let it down from idle it goes back to a clean no error trigger reading.

for the flywheel im using a single mass from an NG 2.3 audi 90 that has the counter weight machined off the back and the single firing pin added exactly where it is on the OEM dual mass flywheel. also on the firing pin on the flywheel i brought the in a little bit closer than what stock was so it would get a better signal. i ran the car in it for 2 years with the stock ECU and never had a problem with it.

Here's my trigger log. this was just idling and trying to free rev the car a few times.

https://drive.google.com/file/d/0B8k41D1CY71wcXl3c3hMQzMxYXc/view?usp=sharing

This the last vemscfg file i used to make the above triggerlog above.

https://drive.google.com/file/d/0B8k41D1CY71wV2ZIdkd0aVFWeVU/view?usp=sharing

Any insight on this would be great, i figured it would just fire and run fine on the default audi trigger settings using the OEM sensors but it wont.

[Thuppu]

Audi triggers are known to have troubles with VEMS. If you had a 60-2 setup, why didn't you just use the Lupo 60-2 rear trigger? There is a lot of happy users with it.

[quattro-nick]

is your firing pin on the flywheel long enough?
I find that the original is rather short and have therefore adapted the pin on my 3b flywheel

[vwnut8392]

Audi triggers are known to have troubles with VEMS. If you had a 60-2 setup, why didn't you just use the Lupo 60-2 rear trigger? There is a lot of happy users with it.

i had that and after having problems with the trigger wheel, tearing my tranny in and out 4 times in 2 days just to figure out the sensor was bad from the factory i threw in the towel with those things too.

is your firing pin on the flywheel long enough?
I find that the original is rather short and have therefore adapted the pin on my 3b flywheel

yeah the pin is close enough to the sensor. i have a single mass flywheel that i added the pin to myself. the pin is so close to the sensor that you cant fit a credit card in between it.

[quattro-nick]

I'm not talking about the gap between sensor and pin but is the pin long enough so that it comes along with full length of the size from the sensor

[newsh]

Most people seem to cure this by adding some length and mass to the pin.

[quattro-nick]

thanks newsh,that is what i mean
not always easy with google translate

[Thuppu]

i had that and after having problems with the trigger wheel, tearing my tranny in and out 4 times in 2 days just to figure out the sensor was bad from the factory i threw in the towel with those things too.

I'm sure you know it's an active sensor and needs +5V.

[vwnut8392]

yes the pin meets all the requirements in the size. i did my research prior to machining the pin and adding it to the flywheel. whats puzzling me is i have to have the TDC after trigger this low to even make it idle. is having it that low even necessary?

[madsavage]

Why would you still use the pin with a 60-2? The sensor gives you position and you don't need to bother with the damn pin anymore. Did you get the hall sensor or the vr sensor?

[madsavage]

You might also have to wire a pull up resistor to the signal line like a 1k ohm resistor to the 5 volt feed.

[V6quattro]

i had that and after having problems with the trigger wheel, tearing my tranny in and out 4 times in 2 days just to figure out the sensor was bad from the factory i threw in the towel with those things too.
.

Im running the Lupo 60-2 trigger for a long time and i never had problems with it

[madsavage]

I've been running one on my megasquirt 3 car for 5 years now. The only Issue I had was with install. I didn't know what I do now and didn't install a pull up resistor initially after that it has been rock solid and I only use the hall sensor on the cam. The timing pin isn't used or needed.

[vwnut8392]

You might also have to wire a pull up resistor to the signal line like a 1k ohm resistor to the 5 volt feed.

my 60-2 setup had nothing to do with the factory trigger pins. This is my 60-2 setup i made.


im not sure about any resistor. i ordered the ECU specifically from EFI express to have the second LM1815 in there ready for audi trigger but disabled to just run VR crank for the 60-2 setup. all i had to so was put a solder blob on SJ7 to connect the 2nd LM1815 to the processor and it was supposed to be good to go.

[madsavage]

If you got the same rear main sensor I have it uses a hall effects sensor and it is a current drain type sensor meaning it pulls the signal low or to ground. You need to have a high signal to start with for it to work which is why you put a 1k resistor to 5v on the signal line. When the sensor is off it shows 5 volts when the sensor turns on it pulls the signal to ground or low. This gives you a nice clean 5 volt square wave signal that the vems will have no problems with.