Hello. Just got a used '06 GC (3.3) in April '09 with 63,000 km on it. A month (May) on the road the MIL turned on with an EGR needing to be replaced. Dealer (used car, not official Chrysler) changed it for free.
I have been averaging 16 - 18 liter per 100 kilometres on it (very high!) so I told dealer about it. Last month (June), we decided to have a tune up, with the plug wires changed too. I was only charged for parts.
Three weeks after the change (just last week, 3rd week of July), engine was hesitating upon start-up, MIL turned on again and was flashing. Pulled out P0300 (misfire) and P2302 (coils) from it. After checking wires, etc, engine turned off.
Engine was cranking but not starting so had to have it towed to dealer. Dealer put in fuses (according to him, fuses were blown) put upon ignition, fuses blew. He had it brought to the local Chrysler they work with and they said there was a short in the wires which they have seen before which resulted in the alternator not working. Chrysler changed that and it's now back to my used car dealer and they are checking for the codes now.
a.) What could possibly cause the p0300 and p2302? Can the work done with the tune up possibly cause that? Parts are MOPAR.
b.) Are these usual repair things for this model?
c.) The dealer also mentioned a possible PCM repair / issue. Just in case, is the PCM covered by the basic emissions warranty? I live in Canada and a second owner. Car has 67,000 km on it.
d.) Are these issues the possible cause of my high gas consumption?
Thanks in advance!