No ecu connection

Just got my speed where I want it and I was driving it going about 30 started to roll into a pull and then my engine just shut off like a blown fuse. Lights stayed on when I try to start it I get a single click from the fuse box but nothing else no crank nothing. All fuses are good battery is good and connection is there. Grounds that I can see are all good. My ap will not connect to the ecu. Anyone ever had anything like this happen. Leaning towards bad ecu or a ground somewhere? Sorry if I posted in the wrong spot.

 

Forgot my mods sorry. I just installed the cs downpipe. I have hpfp internals, cs sri, cs seals, ap with a base tune from drama tuned.

 

Hopefully you didn't pop

 

Going 30? At like 3500 rpm? With low load?

 

yeah that's actually quite common

 

Ok well my old speeds engine popped and it still would connect to the ecu. And if it was popped wouldn’t the starter at least be trying to turn. Also when it happened it made no weird noises it just acted like I turned the key off. Anyone have any idea what it could be other than The engine it seems electrical to me

 

Did you check your battery and alternator?

 

I just did the downpipe and had the alternator out so could be but I hooked up a jump box and it wouldn’t even turn the starter and all my lights are all on full brightness on the dash and outside radio works everything works but when I try to start it does nothing

 

What about grounds does anyone know what grounds could cause this and have a picture or diagram.

 

Found the issue when I installed the down pipe I managed to pinch I wire on the alternator wiring harness. Took out that smashed wire replaced it and it good to go

 

That'll do it glad you got it sorted

 

Now I have another issue that may be electrical causing me to run rich check out my other post

 

How bout you link the other post. For us lazy peeps.

 

I gotchu https://mazdaspeeds.org/index.php?threads/weird-rich-wot-issue.11054/