I need your help guys -
I had my car idling after not running it for awhile.
It was running good, and then all of a sudden it stalled.
When I restarted it, it was running like a pig. It was running really rich and sputtering.
The check engine light was on, so I checked codes by jumping the two terminals.
I got code 15. Unfortunately, in the process of moving, I lost my shop manual.
Can anyone tell me what this code means?
I remember code 15 being a coolant sensor, but would a coolant sensor make it run this bad?
I had to push it back into the garage for fear that I would clog up the cat.
Thanks guys.

BTW The car is a 1982 Trans Am with Crossfire Injection.

 

ttt
Need help guys...

 

A 15 is for a low temperature fault of the coolant sensor. That means the ECM is detecting an impossibly low coolant temperature sensor resistance. Usually, that is caused by a failed sensor or disconnected/damaged CTS wiring.

Yes, having no CTS input will cause backup fuel and spark mode, which will be excessively rich and without spark advance.

 

Is it normal for a sensor to fail like that or should I look more towards a short somewhere?

 

One quick check with an ohmmeter should identify either the sensor or the wire harness. The sensor should have resistance close to this:

 

I changed the cts. It is running good again. Thanks for the help guys.