na-t link g4+ trigger settings help.

[sunny]

Hi,

 

So i got a link g4+ ecu put in my na-t last week and we had an issue where during idle and at different rpm in different gears the car would hesistate and kind of misfire but then as soon it gets past that, its fine. Its fine under boost aswell. I put the emanage ultimate and stock ecu back in and the car runs fine. The tuner said it will be a setting in the ecu but we didnt have time on the day to get it sorted.

 

heres a link to a video of the problem (thats in 2nd gear):

 

We couldnt find a base map for a 2jz-ge on the dyno day so had to use a gte base map and go from there.

 

I looked online in various places and also talked to another tuner locally and pointed me towards trigger settings being wrong. I have attached a screenshot below of all the settings in my link g4+ map that i thought would be of use. If anyone can tell me if that is correct or not that would be really helpful. or if someone has a base maps/settings from a supra na-t non vvti running a link g4+ ecu with the stock distributor setup that can help??

 

Thank you.

 

Edited July 1, 2019 by sunny (see edit history)

[Mike2JZ]

Trigger 2 settings look incorrect. Change cam pulse to crank pulse.

 

Your trigger arming voltages are a bit shit too. Try these

 

https://imgur.com/UrxmIrA

 

Dwell settings look ok, but you can get away with higher dwell ms using a distributor then you can with a ignition coil. Unless you are going mad with the boost then should be fine as is.

 

Be sure to check your base timing with a timing light. Unlike a TT using crank sensor, the distributor can turn slightly which will offset your ignition timing, so very important to check base timing and calibrate correctly.

 

Whilst running the engine, use the Link to log Trig1 errors, Percentage FCut, Percentage ICut. These are some of the main variables that will indicate if your ECU is causing or detecting a misfire.

Edited July 1, 2019 by Mike2JZ (see edit history)

[sunny]

Thanks for getting back to me mike. Tried all that and the problem was still there. took it to a local tuner and he checked everything and turned out to be that flat foot shifting under motorsport was turned on and the ecu was causing ign cut during gears.

 

The issue at idle where a random misfire is still there with the link ecu though. No misfire anywhere with the stock ecu and greddy plugged in tho :/. so unsure as to what is causing the problem at idle.