I also have a 2002 Dodge Ram 1500 with the 4.7 liter engine, everything checks out, fuel pressure, spark and everything else, I can spray starter fluid into the throttle body and she fires right up and runs strong and smooth for a second or two and then dies when fluid burns off, I've replaced fuel pump, cam sensor, crank sensor, throttle body sensor and checked injectors with noid tool, and fuel pressure at the fuel rail test port, it has a remote start and alarm system that have been in it since new but I thought maybe it was the remote start portion of the alarm maybe causing the no start, so I removed that part of the alarm system from the truck so all functions are direct wired again instead of going through the remote start module and still no start? Like I said I've replaced everything that people say can cause this problem, it just makes no sense for it to start perfectly and run strong and then a couple weeks later I go to start it and just cranks and cranks and cranks but won't fire unless I spray starter fluid into the throttle body and then it fires up immediately and runs strong until fluid is burnt up? I know it's gotta be something simple because I've replaced the components that would normally cause this problem and none of the parts made a difference at all, I thought there might be a fuel shutdown switch that if it gets tripped this is what happens, I actually had a vehicle a long time ago that had the fuel shutoff switch that would shutoff fuel in the event of a crash or something like that but it tripped and it acted just like my truck is now except it had a physical switch that you just pushed back in to reset it and get fuel running again and the car started right up, so anyway yeah everything works as it should except it will not allow fuel into the cylinders to fire, but haven't found any reference to a fuel shutoff switch for my truck? I've also scanned the computer for codes with my OT2 OBDII scanner and everything looks good as far as the scanner can tell and there haven't been any codes generated at all, What about the ASD relay? Is that the same as the fuel shutoff switch? Where is the ASD relay and how do I test if that is causing the problem or not? Please someone help me, I'm a fully disabled veteran and need this vehicle to start so I can make my veterans appointments at the VA hospital, I just don't know what to do to get this thing running and there shouldnt be anything that is stopping it from starting? I do remember my wife telling me that our nephew was screwing around under the dash on the drivers side and before that it was starting fine and I've looked under the dash thoroughly and don't see any damaged wiring or anything that looks out of place, or at least I don't see anything obvious so it could just be a coincidence? So anyway someone please help me, I'm at my wits end on this one and need my truck running again
If it is the timing being off would it still start and run strong when spraying starter fluid into the throttle body? I mean you would think that if the problem was the timing then it wouldnt start even with starter fluid would it? Or would it still start with spraying gas or starter fluid into the throttle body even if the timing is off?