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Hi Pete, thanks for your response. Vacuum leaks have been ruled out. Three mechanics have looked at the issue and given up. How does the computer determine a misfire has occurred and attribute it to a particular cylinder ? The reason I ask is when the problem occurs occasionaly it will have pending misfire codes for all cylinders but will never throw a full code as the problem goes away and the computer determines all is good again.
I've taken some logs while the ECU is in Open Loop. I've pulled the A/F sensor plug to keep it in open loop. From the research I have been doing this issue is potentially caused by the ECU and the fix is to reflash it. Are you familiar with what is required to reflash the ECU and where can I obtain a good flash file to load it with ?
Hi Pete, I'd like some info on reflashing the ECU as per above. Regards,