So my odd electrical gremlin is back and I need help figuring this out.. Same issue shut us down last fall and I thought I fixed it... Car had been running awesome last week since the roads have been clear in MI ... Went to start car after work today no fuel pump prime and no go.. Car cranks well and my tuner studio connects to the Ecu ect.. Checked every fuse and had a spare main relay and replaced that. Still nothing Any thoughts/ input ideas are appreciated thank you!

-jake

 

It looks like we have the same problem. Message me if you figure yours out! https://www.miataturbo.net/engine-pe...t-start-88347/

 

Thanks! Still no luck but fuel pump relay is good main relay check, I can jump fuel pump at diagnostic port and it pumps, my Ecu connects to tuner studio but seems like no fuel / spark or is there still no power from Ecu? I'm lost I can't find any bad grounds. Any ideas?

 

do a composite log and see if youre getting signals from your crank and cam sensors.

 

Thanks braineack, I'm leaning this direction I replaced the cam sensor because I broke the stock one when leaning stupidly against valve cover.. I also noticed I get no RPM signal when cranking.. I also check fuel injector not getting any power too when cranking.. Let me try to hook lab top up and open turner studio see if I'm getting any signal from either. Thank you everyone!

 

Would these sensors just die? The car ran awesome the night before and on the way to work that morning

 

now if my dumb *** can figure out how to log the cam and crank sensor...

 

So cam and crank signal and I get rpm signal when starter is cranking...

 

well been a long time figured i give an update.... so sent MS2 back to rev got a new board and firmware.. got ecu back and still no pump prime no start.... tested everything in elctrical system that delt with fuel all checked out... at the end of my wit started looking at tune noticed pump prime pulse was at 0... well that sure was it some how the old tune decided to revert its self 0 really weird so after all the troubles it was some how the tune resetting the priming pulse... so at a lost well everything working fine and dandy right now besides the fact that i cant find the coolant fan controls on the new version of my firm ware... .soon all we be happy