Hello again!
It got colder here again and my '87 T-bird is having the same problems as last Autumn/Winter. It stalls sometimes or runs rough for a short wile, than it gets to normal.
I ran the self test and that's what I have:
KOEO: 31-31 and CM: 11-11.
To make sure I'm counting the flashes right here is a video I recorded while performing self test: http://www.americangranada.com/pics/engine_codes.wmv
What does the code 31 stand for? And how to slove that problem?
Thanks in advance for help!
Mariusz...
I can't hear the engine, so I assume it's off.
I CAN hear the dog barking, though. :)
Code 31 is for the EGR system, often caused by a bad EGR position sensor (or its connections), or by built-up carbon holding the EGR valve partly open, making the computer think the sensor is out of range, and injecting exhaust gasses when it's not supposed to.
My Ford emissions book is for 88's, your 87 3.8 uses a different EGR system so I can't be specific with tests to run.
I've cleaned the EGR valve this year while changing the EGR valve gasket, so there shouldn't be any carbon build-up.
Guess it may be EGR position sensor, but would it cause engine to stall or run rough for a short while?
I was just wondering how to get KOER codes? Should I simply ground Self-Test IN and start the engine?
The description I have is for KOEO codes, so I'm not sure if KOER has the same procedure? Don't want to mess the computer... it takes up to two weeks to get something from USA here :D
Finally I have the KOER codes too:
94 - Thermactor Air Injection system inoperative (left side)
44 - Thermactor Air Injection system inoperative (right side)
31 - PFE or EVP circuit below minimum voltage of 0.24 volts
I had disconnected the Air Pump for a few weeks last winter than I got a new pump and reinstalled it. Dunno why it says the Air Injection system is inoperative. Maybe the new pump is shot?
What should I do with code 31? How to get rid of all these failures?
Guess I'm getting kinda boring but I have new codes. Thought I'll make a cold engine test here is KOEO codes on cold engine in the morning:
21 - ECT out of self test range 0.3 to 3.7 volts
24 - ACT sensor out of self test range 0.3 to 3.7 volts
I've no idea what ECT or ACT is...
[COLOR="red"]E[/COLOR]ngine [COLOR="red"]C[/COLOR]oolant [COLOR="Red"]T[/COLOR]emperature
(Intake) [COLOR="red"]A[/COLOR]ir [COLOR="red"]C[/COLOR]harge [COLOR="red"]T[/COLOR]emperature
You did say it was a "cold" test, right?
Could be a bad pump, could be the valves or control solenoids that tell the valves to divert the air into the exhaust manifolds. Again, I haven't looked at 3.8s, but I assume they have the same type of system as a 5.0, with an air pipe that goes from the diverter valve to the back of the heads.
.
Do you think that may be the reason why my T-bird has some running problems when it gets colder? When it's warmed up it's OK. It usually acts strange from time to time in the morning. Than it runs well all day long.
Guess the Thermactor System isn't that important, is it?