MicroSquirt.com read only forum (Jan.15,2018)

PeterCip,

Yeah, the problem with this, and most other methods of tuning, is that it assumes everything else is right.

So in the real world, you have to keep going back to things to check them. So after you've dialled in the VE table some, then go back and see if the dwell is working well (and ...

Lance,
I was figuring that was the easiest way of determining dwell setting.. The only problem with waiting till i feel a miss is that it might be difficult to determine whether it was the timing valules, or the dwell.

Does 2.6 seem low for an inline 6?
Thanks,
Pete

I replaced my VB921 last night, and its running cool to the touch. In the half an hour i drove around, i didn't notice any missing sparks. ;)

I also lowered my dwell to 2.6ms running, and 4.0 cranking. Is there a way to tell when the dwell is too low? car is an inline 6, reving to 7000; single coil ...

As you observe the spark output LED continuing to flash but get no signal at the coil it seems safe to assume the VB921 is faulty. I would replace it and try again. Run with the Megasquirt case off and feel if the VB921 is getting warm/hot. If it is then reduce the dwell.

James

Thanks James,
I ...

I didn't know where this should go, so i'm retrying over here..

MSNS-E029j - V3 board, MS-1, 2.25MT

Ok,
I am having a problem with what i believe to be the output circuit for my ignition circuit. I have been having problems lately with the spark cutting out randomly. The car literally stops ...

::EDIT:: I was going to tell you the log wasn't there, but now it is! ::EDIT::

I'm having a similar problem, too. If the engine is above about 1500rpm it's almost perfectly smooth, but below that it starts to burp and eventually surge. I'm thinking it's an ignition problem, as I've played with my ...

I'm going to go home and check the timing...I’m going to set it fixed at 12 deg, and check it on a timing light. (12 deg is exactly 2 teeth). if that stays is dead on, then i know its not a timing angle problem. The weird thing is, i had the fuel setup exactly as it is right now with and older ...

::EDIT:: I was going to tell you the log wasn't there, but now it is! ::EDIT::

I'm having a similar problem, too. If the engine is above about 1500rpm it's almost perfectly smooth, but below that it starts to burp and eventually surge. I'm thinking it's an ignition problem, as I've played with my ...

here is the data log... as you can see, the RPM is jumping all over the place under 1000 RPM.

Do i have something configured correctly? under 1000, it looks like its following some pattern. anybody seen anything like this before?
thanks,
pete

ok, so the code is 024s13c, V3.0 MSnS-E, MS-I

For some reason i cannot get the car to run under 1100 RPM.. it misses all over the place, and the AFR reading jumps to 19+.. If it gets near that RPM, it immediately drops to about 600 RPM.. and bounces around.. likes its pulsing spark, no spark, spark ...