To get a true picture of what is going on as far as the miss fire, is to know exactly what is happening in the ignition and exhaust. We can normally point you in the correct direction as to what may be wrong, but some times it's not that simple, especially if you are trying to diagnose something from a computer terminal. So what you will have to do is ramp up the diagnostics at bit. Codes are one thing to look at, but to see what is happening with the ignition is to have it run on an oscilloscope and exhaust gas analyzer, the scope will give you an exact picture as to what the ignition is doing, Voltages, durations, cross firings, coil problems and the gas analyzer will give an insight into the mixtures and emissions, these things you can only speculate on with out the gear. Often you can have a problem that is quite common and the fix is well known, but others are a bit more complex and some detailed diagnostics is required, I feel that you will benefit from a scope reading.
Friday, December 14th, 2007 AT 4:59 PM