10 engine codes please help
Senior Member
Joined: Jul 2004
Posts: 6,200
Likes: 39
From: Easton, Pa.
Not for this 'specific' set of conditions.
Massive 'lean' airflow will cause missing but under wider throttle conditions than what has been discussed.
The differences is how it manifests it'self, and requires close attention to how it shows versus what causes it.
When there are two or more issues present is when it gets to be a real hassle to sort out.
.
The above conditions for coil failure is brought on by a combination of things that happen all at the same time.
1. the coil has shorted turns, that lowers it peak spark output voltage.
2. the fuel is cut back making the mixture very lean and as high as 20 to 1 ratio to the point the plug can't fire it..
3. the ignition timing is advanced because of the lean condition but by design.
The reason timing is advanced is the lean mixture combustion speed greatly slows up and needs to be ignited well ahead of normal, to keep the motor smooth operating so you don't feel a 'lay-down' in power diring light throttle conditions. This is also a fuel mileage improvment as a side benifit and one reason NOT to remove or defeat EGR.
4. the EGR opens, introducing exhaust gas back into the intake air stream.
Add to this, plug errosion and you get the recipe for missing and stumble 'when' all these conditions are present.
All these are a complex series of events all conducted by the PCM.
Since it is not a constant happening (throttle angle sensitive), the PCM can't id the fault by code but you feel the results of it.
In the future, Ford may find a software monitor routine to include all these items so the PCM may be able to tell or record history and better able to make a logic decision, with assigned codes.
Bottom line is there can be several areas that need attention, in some cases.
Understanding the operation is more than half the battle in diagnosing an operating fault and is why just going by code numbers only, often is not the easy fix by replacing parts wholesale unless some luck as come your way..
Massive 'lean' airflow will cause missing but under wider throttle conditions than what has been discussed.
The differences is how it manifests it'self, and requires close attention to how it shows versus what causes it.
When there are two or more issues present is when it gets to be a real hassle to sort out.
.
The above conditions for coil failure is brought on by a combination of things that happen all at the same time.
1. the coil has shorted turns, that lowers it peak spark output voltage.
2. the fuel is cut back making the mixture very lean and as high as 20 to 1 ratio to the point the plug can't fire it..
3. the ignition timing is advanced because of the lean condition but by design.
The reason timing is advanced is the lean mixture combustion speed greatly slows up and needs to be ignited well ahead of normal, to keep the motor smooth operating so you don't feel a 'lay-down' in power diring light throttle conditions. This is also a fuel mileage improvment as a side benifit and one reason NOT to remove or defeat EGR.
4. the EGR opens, introducing exhaust gas back into the intake air stream.
Add to this, plug errosion and you get the recipe for missing and stumble 'when' all these conditions are present.
All these are a complex series of events all conducted by the PCM.
Since it is not a constant happening (throttle angle sensitive), the PCM can't id the fault by code but you feel the results of it.
In the future, Ford may find a software monitor routine to include all these items so the PCM may be able to tell or record history and better able to make a logic decision, with assigned codes.
Bottom line is there can be several areas that need attention, in some cases.
Understanding the operation is more than half the battle in diagnosing an operating fault and is why just going by code numbers only, often is not the easy fix by replacing parts wholesale unless some luck as come your way..
Member
Joined: Dec 2007
Posts: 66
Likes: 0
From: SOUTH GEORGIA
I might be a bit behind but have you used ur superchips programer to clear the codes and track what codes show up first one might be causing the other also I have had a very bad time with superchips when did the issue start any reference to the programer
