ECU code 11 then 21

[wow-thats-a-cool-car]

Just swapped a motor into my car and it fired up fine first try drove it for a day then it will not start. I checked everything in the engine bay then I checked the ECU for codes...I got 11 and 21. This means the crank angle sensor is faulty. Should I just change it or is there something I over looked or could do instead.

The car is a 1989 nissan 240sx hatchback with a dual cam KA in it

any help is appreciated! thanks

[wow-thats-a-cool-car]

so can someone please help me!!!

[yukon]

Are you sure you did not burn something out because you used the wrong ecu, power transistor , etc? i doubt it is your cas.

[Rabboni]

Since there is no way of testing the cas without an oscilloscope you should just check the wiring from the sensor to the ecu. That way, if the wiring checks out good, you know that it is the sensor and you should just replace it. I doubt the pcm burned because that doesnt really happen often, but id still pray for the best.

[wow-thats-a-cool-car]

I just replaced the ignitor and the cas and still nothing? I'm pretty pissed I got the car running and let it sit for a week and this happened!!!!!

[yukon]

Check fuses and make sure everything is plugged in first. then the dist cap and rotor for anomolies . then the ecu and harness for burn marks.

jiggle connections especially the ecu plug to see if things change.

[essforteen]

check the power harness the two connectors on the side of the pass. fender
the brown and gray one
make sure there is a good connection

[wow-thats-a-cool-car]

the is power the ecu works fine and the fuel pump is priming

urg!!! how do I check the connections?

[essforteen]

Are you getting spark.
is the starter cranking
do you hear it trying to start???

help me help you!!

[wow-thats-a-cool-car]

Im getting everything but spark!!!!

[essforteen]

have you checked your coil

[Rabboni]

If youre getting everything except spark then start at the plugs and work your way back to find where voltage was lost. Also, did you check the wiring for shorts and/or opens or did you just throw parts at it. If so, results?