Originally Posted by K20 Mini (Post 556484)

I have read all the threads on no start and none of them seem to pertain to the problem I am having. I just installed my :brain: built MSII and I got through setting up the sensors but when I tried to start the car it just turns over. I have checked for spark and fuel and I don't think I have either. The MS isn't showing any rpm, p/w or duty cycle activity. The car will start with the oem ecu in place, although it has no maf and 550s so it doesn't run long. My guess is that it isn't getting an rpm signal so nothing else will work, but why? is there some ignition setting I am missing, I just have what ever was loaded on it when I got it. Any help would be awesome, the setup is 2000, 550s, walboro 255 and maf delete. I am a total newb, so if I have left out any important information just yell at me and I will add it. Also, on the ts default gauges at the bottom, during cranking, it says "not cranking".

Originally Posted by efe (Post 559013)

This may have nothing to do w/ not starting, but I just ran through an issue w/ my MS related to the RC550 injectors. I found out the hard way that MS does not like the RC550 low impedance injectors, so you may want to make sure you have high impedance injectors. It wouldn't cause a non-start, but it will cause poor performance and fuel control and possibly break your injectors if they are low-z.

Originally Posted by Miata140 (Post 558066)

Hey!

Jumped into this thread since I've got the exact same problem. Got the basemap for 94-95 miata installed and made alterations for wideband etc.
Tried diagnostics in Tuner studio, like suggested, but got no readings at all in any of the Loggers. getting fuel though, but what else?
Suggested experiments?

Regards///Magnus, sweden

Originally Posted by ben (Post 559132)

k20's problem is very obvious that his ecu is not reading the cam signal.

If you're not reading rpm, then you shouldn't be getting any fuel. If you have no tach, but your injectors (or coils) are working, then you might have some major problems with your jumpers. I would re-verify every wire and go from there.

Originally Posted by Braineack (Post 559250)

needs more attaching and less editing...

Originally Posted by Miata140 (Post 558718)

Hi!

It's a DIYPNP.
Input mods is straight off the one from DIY Autotune, only forwarded O2 from harness to serial 18 pin. No pullups, no knock, no I/O, no H C drivers.

Originally Posted by Ben (Post 559395)

R3 and R4 pullups aren't really optional. That's why they're listed in the docs and specifically called out in the application guide. ;)
Your car will not run without them.

Originally Posted by MX5RACER (Post 559387)

One issue I was having with my DIYPNP was that the Tacho output was set to on. I turned it off and the car fired right up. Not saying that is your issue, but it did happen to me. I used the '94-'95 base map from DIYAUTOTUNE, by the way.

Originally Posted by Miata140 (Post 559957)

Read thru the beginning of the assembly and it says - "Install all resistors in the locations marked on the board except R26 (the knock sensor trim pot), R39 (camshaft signal adjustment), and R1 through R5".

Originally Posted by Braineack (Post 559964)

there's a pin conflict error with js10, a few circuits are set to use it, there should have been a warning message that told you this when you powered it on.




Those are the general board assembly instructions, but as you can see the pull ups are listed in the spreadsheet on how to assemble it for your specific application. They are required to get your tach signal.