trigger error/ too many primary triggers

[bart]

So back agian & working with tha problems I have regarding misfirings/trigger errors...but since the last topic did not include the trigger errors, I started this one. This is the old topic: http://www.vemssupport.com/forum/index.php/topic,1421.0.html

Mattias, you asked för a new trigger log, while cranking, & here it is. Looks much better now doesn`t it?


BUT! why do i still get the misfirings just like before? I also still get the trigger errors / too many primary triggers???

Should these look like this??




& to be clear, I have changed the trigger sensor already! THese logs are with the newly installed NEW sensor

[mattias]

The graphics indicate that it's ok, but I would make sure the cam sync is even further away from the missing tooth gap so that it can never be mistaken to appear before the first tooth after the gap.

Did you set the    "Event of bad trigger" to default ?  = just show
http://www.vemssupport.com/forum/index.php/topic,1483.0.html
It appears it falsely gives an error, fixed in 1.1.82.

[bart]

hmmm, ok! I will try installing the latest fw & check again. Any hints on an easy way to separate the two trigger signals a bit then? I mean, I can´t just rotate the distributor now can i? Or is the only way to do so by rotating the trigger wheel on my crank

Oh, by the way. You say the primary / secondary trigger log now looks good & so do the values in the other logs. This is at cranking. But as soon as I start the car & the ignition starts to compensate/adjust thats when I get this phenomenon...the misfiring.....

[mattias]

You are running a distributor based ignition right now ? Or separate coils ?
You can twist the distributor a bit, and you should check anyway that the rotor is aligned to hit the corresponding posts in the cap at 20-30 BTDC to give a good spark.

You can change the trigger edge (falling vs rising) for the secondary trigger, it will then shift a large number of degrees depending on the width of the "window" that the trigger sensor sees.  I'm not sure if it will appear earlier than the missing tooth gap, or later. You'll see and it would be cool if you posted the graphic view of that, you could also zip the triggerlog file and upload to vems.hu file area.
http://www.vems.hu/wiki/index.php?page=FileArea

Only upgrade the firmware as a last resort, this should work.

If you want to try 1.1.84 firmware, make sure to use the latest nightly release :
http://www.vems.hu/download/VemsTune/NIGHTLY/VemsTune-Install-2010-11-04.exe
I'm not confident with the stability of those releases of VemsTune, but it's required for this firmware since the introduction of a safety and immobilizer function in the firmware. The dev team is working on a new communication model, that'll turn out better.

[bart]

Yes, distributor with a crane cams HI-6 CDI & a fire ball coil system. Spark enough to kick start a smaller power plant
At start up the ignition is set to 29 BTDC & slowlyadvances down to approx 9 BTDC.

I will change the setting from falling to rising on the secondary trigger & post a log here tomorrow, no problems. After experimenting with the settings I will rotate the distributor & check with log & with running engine to see if the misfiring continues or not.

back tomorrow with results    ...may Murphy be merciful 


thanks for the tips MAttias!

[bart]

& Murphy said, let there be light.... & light there was HALLELUJA I have not heard my engine run this smooth for a very long time...god da_n it!

I have now changed the sec trigger setting from falling to rising, thats all! I did assume that the triggering would actually appear earlier..





I let the engine run until the coolant temp was up to 60 degrees & it still runs smooth.....earlier the engine would die due to the misfiring... Here are some youtube films taken earlier today without misfirning & the first film is from yesterday (misfiring at end of film)

http://www.youtube.com/watch?v=n1LS3YkSywg

http://www.youtube.com/watch?v=mA027lIW4HA

http://www.youtube.com/watch?v=SaGmx2xoOeA

Mattias, a really big THANK YOU for taking the time to help me out so far!

[mattias]

I happened to have the same problem this summer with an Audi S2, same engine and also with the new 60-2 trigger at the back of the crank/engine. Apparently on these engines the cam sync appears too close to the missing teeth, so the triggerlog is a godsend to find out where it is.