Air Fuel ratio to rich - no errors
07-31-2017, 04:21 PM
#1
Junior Member
Thread Starter
Join Date: Jul 2009
Location: Poland
Posts: 29
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1991
Engine: 3.1
Transmission: Automatic
Air Fuel ratio to rich - no errors
Some time ago I started to smell a lot of fuel from the exhaust. Fuel consumption went up, and You can hear fuel burning in exhaust after taking leg off the the throttle pedal.
So I've checked error codes -nothing
I've disconnected O2 sensor, drove for some time - still no errors
So I've checked wire form O2 to ECM, and everything looks all right...
Checked everything on three different O2 sensors.
Next step was to replace ECM, and still no codes, what is going on?
And it was even worse bucause cars started coughing on second ECM
I have EGR and Air pump deleted frome the car and from first ECM, and on the second ECM there is no error codes about EGR... still don't understand it.
It's only showing code 12 on both ECM's
This is crazy!
Couple months ago I've raplaced injectors and fuel pressure regulator-non adjustable but in this department everything is OK
So I've checked error codes -nothing
I've disconnected O2 sensor, drove for some time - still no errors
So I've checked wire form O2 to ECM, and everything looks all right...
Checked everything on three different O2 sensors.
Next step was to replace ECM, and still no codes, what is going on?
And it was even worse bucause cars started coughing on second ECM
I have EGR and Air pump deleted frome the car and from first ECM, and on the second ECM there is no error codes about EGR... still don't understand it.
It's only showing code 12 on both ECM's
This is crazy!
Couple months ago I've raplaced injectors and fuel pressure regulator-non adjustable but in this department everything is OK
Last edited by czlowiekmucha; 07-31-2017 at 04:26 PM.
