1CUTLASS

The car started stumbling, then became hard to start, then would crank, but not start. I used the paper clip trick in A and B to obtain the Codes. When I turned the key on, the Engine Cooling fan started to run, and stayed running and all I got from the codes was the 12's with no other codes. It continued flashing the 12's and fan ran until I turned off key.


Any Ideas would sure help.
Thank you

Bens71442

Pull a plug wire- check for spark. No Spark=replace Ignition Control module. a bad ICM will not set a code.

joe_padavano

Unless the Check Engine light was on, there are no stored codes to read. Keep in mind that there are MANY possible failures that do not set a code. The codes are only set if a part fails that is tied to the computer. The OBDI computers are very limited in capability due to limited processing power.

Get a factory Chassis Service Manual and follow the troubleshooting steps in it.

pogo69

that code 12 is considered '' normal function'' i believe so was the service engine light on?.... i did have a car with a similar condition and it was the crank sensor in my case

1CUTLASS

Has spark, tested 1 & 3.
Thank you

1CUTLASS

Thank you, L

1CUTLASS

No Check Engine Light/Service Light.
Engine turns over and fires, tries to start, then just cranks.


I hear the fuel pump engage when I turn on the key. Held gas pedal to floor on another occasion same thing.


thank you, L

pogo69

My car did not throw a code for the crank sensor...thats what reminded me of your situation i also at the time ruled out spark and fuel although i checked the fuel pressure i hope you narrow it down

1CUTLASS

Thank you for the info. I will investigate into the sensor.