Ok guys lemme start off by saying I SEARCHED MY *** OFF for weeks since i purchased this car..... I bought my 1992 Miata not running 1.6l boosted etc.

since i bought the car the wiring was a nightmare so i replaced the harness.
The megasquirt was also a nightmare so i bought a megasquirt PNP.
I Also bought A CAS, A ignitor, and stock ignition setup with ngk wires...

SO to get up to speed.... Harness installed, new megasquirt pnp installed... ait sensors hooked up to AFM connector, All grounds checked, etc.....

we hooked up to tuner studio and tried our first start with all new setup.... Its getting no tach signal, no fuel, and no spark..... Hmmm leads me to recheck everything and i did.... So then im thinking let me go borrow parts off a buddys running car.... SO i pulled the Cas, ignitor, and ignition coils, and wires, and ecu... from a buddy running and driving car... installed and still nothing....... ****

TIMING is 100% dead on.
Battery is 100% charged (starting with a jump pack as well to be sure of charge)
All fuses are 100% good.
Im at a loss here guys.... I have spent thousands on this car and i paid over 6k for the car not running.... I know its somthing stupid..... Please help me figure this out..

Also im going to clean the ignition switch and try that because i saw it pop up while searching through old threads... although i highly doubt it would cause no spark and fuel.... THANKS IN ADVANCE!!!

 

Tuner studio is showing 0rpm while cranking, no ignition timing, and 0 pulse width. Manually testing from the megasquirt can get 1 of his original coils to fire. We didnt pull the injectors to test them manually. I didn't think about taking a datalog while cranking.

 

we are leaning towards a firmware issue, just like this thread.
https://www.miataturbo.net/megasquir...-diypnp-69379/

 

Sounds like a wiring issue to me.

Confirm the firmware though as that is an easy check.

If that doesn't work I'd whip out the old DMM and start checking continuity from various connectors to the ECU connector. Also, for good measure I'd double check grounds. It's easy to forget one when swapping a harness, and there are a lot of them. Also double check all connectors are seated properly.

If the car won't run with a stock ECU I doubt the MS is the problem.

 

Ok cool we did the firmware update and now we indeed do Have spark and tach signal..... BUT NO FUEL.... :(

 

do you hear the Fuel pump prime?

 

Yes

 

No fuel pressure? If the pump is priming then it should have something. Put a pressure gauge in line on the feed to get a number. Or are you just getting no injector signal ?

 

No injector signal

 

Stock harness right?. ok.

What kind of injectors are they? They should be a color on the top and there should be a part number on them.

You may have the wrong kind of injectors.

Also check your grounds!

 

The injectors are some cheapo ebay ****.... there 440cc.... But I know there working because if I just jump Fuel pump relay and install the stock ecu... Car fires up first crank.... everytime....