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So I was unable to get spark.. swapped back to stock wiring and ECU and I have fuel and spark but spark is way to weak. You can barely see it and doesnt seem to be enough to ignite. The engine flooded and pistons were flushed out. Removed the fuel from cylinders and same thing. Weak spark.


Replaced coil, and weak spark. Battery was fauly but installed a good battery and same thing.

Have yet to replace the crank sensor, camshaft sensor and HEI. I suspect a bad HEI? I made sure its grounded and no go. Tried a different ECU and that different ECU does not power on the fuel pump.

Spark plugs were take out and cleaned.


So this is where I am at right now. I am quite embarrassed since I usually know my mx3 stuff.

Car was working perfectly fine before my failed megasquirt install.

I will be trying out a whole other disty and ill buy a new hei considering mine is around 2 years old and they are cheap.

SOMEONE HELP PLEASE! :/

A local member here had some troubels with his relay. Check the fuel relay as well.

Relay is working fine. The engine was flooded. pistons look clear now because of excess flood.

The spark is just to weak.

What have you tried swapping? Tried the coil? So you're getting spark at normal intervals just not strong enough? Were you messing with any grounds during install?

Not that I can remmeber . I wireed everything back up. changed coil, havent changed hei yet but it does have ground and power to it.

I swapped ECU also. Next in line to be swapped is HEI , camshaft position sensor and crankshaft sensor. I mean what else is there to change? o.0