What could be the causes of this? When disconnecting any of the coilpacks on the right hand side (look at the car from head on) there is not drop in revs implying that these cylinders are not getting either the correct amount of fuel/spark. CAS was retarded pretty far but even when adjusting to stock doesn't make any differences. PTU looks strange. Looks like an s2 but has Mitsubishi logos all over it, and the plugs look slightly odd. Car runs, just struggles to stay alive with how badly its misfiring. Also to add, car has a nistune or some sort of ECU piggyback, would the tuning of the car potentially affect this?
Service manual page EF & EC -118 i will assume you know ahow to use a multimeter and have one. 1) I would suggest you check for +12v at one of the Coil pack connector wires. if you see the +12 volts on one of the coil pack wires note which wire. See 12V go to 2 No +12v Check the Service manual page as above. 2) Check for the ground wire of the coil pack connector by placing the Positive (Red) multimeter lead to the Battery +12V lead and using the negative (Black) Multimeter lead see if you can see 12V on another wire on the coil pack connector. You only see 12V on the meter if the negative multimeter lead is connected to the Ground wire. If these checks turn out ok there is one more check to test the ECU signal to the coil packs via the PTU. MichaelZ
If your diagnoses is correct & you have a complete bank out of action, it would more than likely be a wiring or ECU fault. The engine would be running like a dog, as it would in effect be a 1.5 Litre engine firing at half the speed it should be. If it is Nistune equipped, it should be obvious what is working & what isn't when you connect it to the computer. The same is true if is an OEM ECU & it's connected to ConZult. As you appear to be uncertain what type of ECU is fitted, perhaps request assistance from someone who has the equipment to diagnose the issue/s.
Will connect it to the computer next time I try and diagnose the issue. Engine runs like an absolute dog at the moment, and I doubt it's anything more serious than a wiring or ECU issue. I think the injectors are fine so it's not a fuel issue. I've narrowed it down to either coilpacks not getting the correct voltage, or an ECU fault. Is there a possibility of the AFM being the issue? The connector seems very dirty so it could not be running 100%.
Sorry for my choice of words, but I meant that there is a possibility of the afm being faulty as the connectors and the afm itself seem dirty and perhaps damaged, and would a fault in the afm cause an issue like the one that I'm having?
What precipitated the issue? It is extremely unlikely that an entire bank of cylinders spontaneously dropped
