So im driving today, and the SES light comes on. When i get home, i park and check the code, 43. I try to start the car to move it and it wont start. It turns over but will not stay at idle if i let off the gas. It was also backfiring a ton and you could smell the richness. I have no clue what it's deal is, can anyone point me in the right direction. This has happened a few times, with it eventually starting up and running fine only to have this happen again a few days later. Its really getting annoying and i want it fixed for good.

 

Check you Memcal / swap known good ecm / memcal