MichelleBeMyGT

I have a 2003 Mustang GT. Today, it seemed to catch a cold today.

I was driving down the road when the SES light came on. I went and had the codes scanned at Advanced Auto Parts. They picked up the following error messages.

1) System running too Lean

2) System running too rich

3) Single or Multiple Cylinder Missfire

The car seems to run fine and all the power is there going down the road. When sitting at a red light, at idle, it seems to start vibrating. It has never did this before. It is like it is struggling to idle...

Any IDEAS???

jdaniel

Seems as though one or both of your O2 sensors went out or the MAF is gone. One or the other.

blueangelfightr

Yea, you can't run too rich and too lean at the same time.

MichelleBeMyGT

Ford checked it out today. They said there was a bad injector. Two of them in fact. They are going to replace them next week.