rx8 trigger wheel question
 

ok i got the rx8 trigger wheel to work on my car but I'm having a few issues…the set up is s5 13b using fc coils and rx8 trigger wheel and on the megasquirt is set up for trigger wheel and i have 3 spark out puts. the problem is that I'm not getting the trailing coils to work but the leading is working fine and the car drives smooth and idles perfect. on tunnerstudio i have the rotary settings set to fc should i change it to fd or rx8 since I'm using the rx8 wheel. thanks

The wheel setting is independent of the spark outputs. Setting RX8 wheel should work with any engine and ignition configuration.

The problem you are having is most likely related to wiring or similar.

Ken

ok i have it wired as follows d14 to ign spark output A pin 36 on the leading coil d16 to IAC2B output B pin 31 to red wire on the trailing coil IGT and d15 to IAC2A spark out put C pin 29 white wire on the trailing coil select

settings at the megasquirt
is 36-2-2-2
65 trigger offset
going low
rising edge
fc mode

also all my leds are fully on… i installed a sparks tester to the spark plug wire and i can see a really tiny spark when i close the gap really close but is really weak

no one else here can help

Are you certain that the coils themselves and the ignitor are in good shape?

Ken

i swap coils twice but i can try a 3rd set it might be that my coils were bad from the get go.. how can i test them

Can some one guide me on the right direction on how to test trailing coils. Thanks

That information should be in the factory service manual for the car those coils came from.

Ken

What those the LED's should be doing while cranking and idling

The left and right LEDs should very briefly blink during crank. The middle LED should very visibly blink during crank. At idle the left and right LEDs should just be dimly lit and the middle should blink. The middle LED should be wired to coil select on the trailing ignitor, the right LED should go to trailing IGt.

Ken

All my LED's during idle are solid on and during crank the left one blinks and the other two are solid on. I do have it wired that way. I'm stuck I tried every thing with no good results

Sounds like you don't have trailing ignition turned on, or you are using a firmware where it doesn't work.

Have you ever posted your msq?

Ken

were do you turn trailing ignition on? and i will post my msq here in a bit

im also using 3.1.0 ms2 extra

here is my MSQ

Should I try rebooting the software an also if I have 1k resistors on the LEDs for the spark outputs would it be a problem

I've not had a chance to look at your msq or try it on the bench. I'll try to get to that in the next day or two and let you know what I find with that firmware.

It might just be that trailing is broken in that firmware.

Ken

Ok thanks

Problems in the msq:

Trigger Angle/Offset should be 0.
You're using far too much cranking advance. That should be closer to 0 degrees.
Your maximum dwell duration is probably getting close to the current limit. Try something closer to 2.6-3 ms
Did you turn on the noise filter on purpose? It should not be used unless you actually need it.
Your staged injection table is going to stage at anything above 75 kPa regardless of RPM. Is that what you intended?
Your idle advance settings are probably going to give you idle advance when you don't want it.

My recommendation is to get everything working correctly, then start turning on the more advanced features like idle advance.

None of the problems I found above should explain why you don't have trailing ignition, and I vaguely remember someone saying that the 3.1.0 firmware had a bug that kept trailing from working, so I'd try the latest stable firmware which is ms2/extra 3.2.1.

Ken

thanks man i will try all this tomorrow

ken i tried the new firmware and its still doing the same thing..the LED,s are still doing the same and still no trailing. i also fix those other setting you said . what else can i try

It's there a place on tunner studio that you can set the spark output

Everything you had set in your msq as far as spark outputs looked fine.

I'll test on the bench and see if it's working later. If it is working, it's likely that you made an error modding your board or wiring to the trailing ignitor.

Ken

Do I have to use 4.7 k resistors cause I'm using 1k. Should I swap pin 31 and pin 29 and if it works cause now I have pin 29 on the white wire and pin 31 on the red wire on the igniter