The MAP sensor on megasquirt ECU’s is inside the ecu case itself. Its Nice packaging and make the map sensor last forever. it also simplifies install as all you have to do is run a hose to the ecu and no extra wiring. In this case though, while the ecu was being removed, the customer got a little aggressive with the map hose and pulled the map sensor off of the header pins, this made the car run horribly as you’d guess. We brought the ecu in, opened it up and with some carefull soldering, its back on the road. A washer was added to the the though case fitting to help protect the sensor, and a hose coupler was added about 6″ out of the case so the map line can be disconected there istead of fighting the ecu.
This 96 cobra is turning into a pretty dedicated open track car but it had a few issues once it was on the dyno. The IMRC system didn’t work correctly, it was way down on HP, the mixture was way too lean, and the ignition system was not keeping up. We pulled the upper plenum and the IMRC valves were stuck in the middle of their opening. The fix is to pull the IMRC plates, remove the butterflies, and then epoxy the holes up. Its kind of a big job, but with the ecu thinking the IMRC’s are flopping all over, the ecu can not control the timing, and mixture properly.
To do the job properly and get the little screws out without killing them and breaking the heads off, you really need a good impact driver such as this on.
