Adamw

Yes, there are a few ways you can do this with a G4 but the easiest way is to use the 'dual fuel table'. Under 'fuel corrections>dual fuel table', set the table mode to 'dual table'. In this screen you also select what input is used to activate the second map. There are many options here - you can use a digital input if for instance you just want a basic on/off switch on your dash for the map changeover, or if you want to do something more complex you can even use a virtual aux - for instance if you want to add some other conditions such as 'second map can only be selected when air temp is below 30°C' or whatever else you might want. After you have turned on the dual fuel table you will see a new fuel map 'fuel table 2' in the ECU settings tree. You will then also need to go through the same process to set up the 'dual ign table'

Arming threshold settings are only for inductive sensors, once you change the trigger type to optical/hall you will not have arming threshold tables.

Ok, so it looks like you cant tag/hyperlink images into this forum and it also seems you cant edit your own post after it is posted either?? So I hope you will still be able to click my links above to see the settings. If not please post back and I will try again.

The AEM EPM is uses optical sensors to give two 12v+ square wave outputs, one 24 pulse 'crank ouput', and the other a single pulse 'cam output'. So, your ignition settings should be setup like this: You will then just need to go through the 'set base timing' proceedure. For your tacho, you will have to connect to a spare aux output and set its fuction to 'tacho'.

The storm & extreme have about 4MB logging memory, the Atom has only 512KB. In all cases you can choose what channels to log and the frequency. 50Hz is the maximum in the current firmware. If you log all channels and parameters at max sample rate it will give you about 14mins logging on the storm/extreme or 2 mins for the Atom. I cant remember if you can export the LLG file natively but there is a third part app for doing that if you need too. See here: http://www.linkecu.com/forums/G4Forum/382067331?b_start=0#253582266 Although I think you will find the PCLink logging software is pretty good and will cover most log interpretation needs well. Â

You are just converting a 0-20ma signal to 0-5V, so the resistor goes across pin 3 &10. Then, pin 10 goes to ecu sensor ground, Pin 3 goes to the ecu analog input.

I dont see much in your log to suggest you have any trigger issues now. I would suggest you check ignition timing with a timing light to make sure it matches what is commanded by the ECU at a few different RPMs. Also check that rotor phasing is ok at various levels of advance (cut a hole in an old dist cap). Also, both your ignition and fuel maps could do with some smoothing, I know you have only just started tuning it but you have some fairly abrupt changes from cell to cell in some areas. You also possibly have a bit too much advance in the 4000-5500RPM, 80KPa area and that 5500 RPM column doesnt look good at all.

Here's one that I put together if anyone is interested: http://www.sendspace.com/file/zj1qkt All 1200 pages of it!

Using a 36-1 trigger wheel with a GT101 is often borderline unless your wheel is very large diameter. The gaps between teeth need to be quite large (~10mm) and the teeth need to be about 5mm long to get a good reliable trigger from that sensor. Although the Gt101 is still a popular sensor for crank triggers and seems quite dependable, it does have some negitives such as the tooth/gap size required and the response time is a bit slow for high RPM use. I generally like to lean towards a VR sensor on high tooth count wheels for better accuracy.

Previously Matthew Black wrote: hi i recently installed a lc1 wideband to my link g4 skyline gtr/gts ecu ecu it reading afr no worries engine it idleing at about 13.5afr but i set my closed loop function to (stoich mode (wide band)) and it keeps trimming fuel out untill it reaches 15% by then my afrs are 16+ and if i change the f trim limit to more it just keeps on leaning out till engine stops.so i dont think its working have i fogot to set up something?  I dont have PC link with me on this PC but there is a firmware bug which causes issues with CLL if you have an input set up for fuel pressure. More info here: http://forum.vi-pec.com/forum/viewtopic.php?f=3&t=1088