Originally posted by UnIm
NO NO NO NO! If the ic pipe was disconnected you would just get no boost, that has nothing to with it. You might have a blown head gasket, boost sensor, wires going to and from boost sensor should also be checked.
My brothers 3rd gen rx-7 had a diconnected ic pipe and didnt notice until boost was expected but it didnt prevent the car drove driving. plus we thought the boost sensor was out and it was just a bad wire.
the key thing you said here is R-X7!!! boost sensor? dsm's use a maf befoe the turbo to measure the amount of air coming into the motor, So if there was a i/c pipe off it would cause the car to kick and sputter when you give it gas but would most times atleast idle. go back to the mazda forum....
The ecu is a good place to look, if you know someone with a pocket logger they should be able to pull any code the car may have. Did you do any thing to the car right before this happened or did it just happen one day? what were you doing when it stopped running?