Low Down Dirty Codes

[sands9330014]

When my Mustang warms up, it emits black smoke and the engine starts idling. 12, 18, 26, 42, and 92 were detected. I replaced most of the sensors, but it still doesn't work. Please help.

 

[General karthief]

When my Mustang warms up, it emits black smoke and the engine starts idling. 12, 18, 26, 42, and 92 were detected. I replaced most of the sensors, but it still doesn't work. Please help.

This is an old thread.
You need to start a new one with more car info like, how long you've had it, recent tuneup, modifications that kind of thing.

 

[Noobz347]

When my Mustang warms up, it emits black smoke and the engine starts idling. 12, 18, 26, 42, and 92 were detected. I replaced most of the sensors, but it still doesn't work. Please help.

This is an old thread.
You need to start a new one with more car info like, how long you've had it, recent tuneup, modifications that kind of thing.

Let's start here.

OP, what's your year and mods?

I assume those are the codes you have pulled?

What other symptoms/issues are you having?

 

[Mustang5L5]

Code 12: System cannot raise engine speed above normal idle. This means the ECU was unable to raise the idle 1500 RPM during the self test. The IAC could be faulty, disconnected or maxed out.

Code 18: See Here

Code 26: MAF out of range

Code 42 & 92 : system rich.
Code 42 passenger side sensor, as viewed from the driver's seat
Code 92 is the driver side sensor, as viewed from the driver's seat.


The rich condition may be a result of the other codes. I'd probably take a look at code 12 first and then probably focus on 18 and 26