We have a 2006 Kia Sedona mini van.
It turns over but will not start. We have good compression on all 6 cylinders. We checked all the grounds. We have good spark. Good fuel pressure.Took it to a Kia deslership to fix the TPS codes They put in a new TPS sensor and reprogrammed the PCM.
Codes cleared but still, cranks but no start. You can pull the plugs and they'll be soaked. Dry them off the engine will sound like it wants to start but dies right out. Pull the plugs back out they'll be soaked again. We checked the cam and crank senors on a lab scope but the signals appeared clean and within specs. We tested the mass air flow sensor which our scan tool tells we are supposed to have at 1.0v koeo. it Reads out 2.62v ac and 2.62v dc. At this point we were thinking we had a bad MAF sensor. We replaced with a used one and a brand called Delphi. Neither one changed the value.
We assumed a faulty PCM. Found a used one out of an entourage. We called the dealer to make sure it wasn't a PCM that has the immobilizer which it wasn't. Swapped out the PCM and still the same symptoms persist, same MAF signal. We then checked the wires and connectors from the PCM to MAF. They were all clean and had good continuity. Still crank, no start.
After we had to have the car towed home from the dealership because they couldn't get it running. We wound up with a P0105 MAP code. We were wondering if anyone who is familiar with Kia's could help us out.
Does anyone know what the root cause could be?
Are there any steps we can take to gather data in order find the source of the problem?