I was driving at about 60 and it started backfiring. I got towed home. Trouble codes were for fuel system and o2 sensor. I reset the obd. It won't start. Has spark and fuel pressure. I sprayed starting fluid into intake to see if I have a fuel problem or what. It backfired out. So hooked up my timing lite to see if mabey the belt had jumped and I cannot find the marks. The book says they are on the crankshaft pully. It is clean but I can't see any red (or any other color) marks. Any help?????

 

The marks are on there, but they might be hard to see - especially if the marks faded off.

Just look for marks in this pattern:

 

Thanks! Tnat helped a lot.