Possible ECU fault?
After much messing about i finally managed to get the ECU to display the Fault codes however it returned a no fault code (4, 4, 4, 4). I was hoping it would have said something was wrong and that i could easliy fix it. Anyway about a week later a tried again but this time it gave a Lambda Regulation Fault(1, 2, 2, 3), great i thougt now i can fix it however after reading the manual it says the only course of action is to replace the ECU!! not so good.
Just out of curiosity i tested it again a couple of days later but this time it again gave the no fault code!!
Has anyone had similar problems or can suggest the best course of action?
By the way the car is a 92 1.8 8v, and i'm having the what seems to be a common fault of excessive fuel consumption, and poor low speed throttle response. Both the Water temp sensor and Lambda sensor have been replaced.