Some motherboards are compatible with specific processors, make sure you have the right one. Just because it seats on the socket doesn't mean it's supported.
Check a few things with help and taking the necessary precautions.
1. Remove the coil (not the sparkplug) insert a temporary sparkplug on 6th coil (not the ones in the engine) have someone turn on the tribute and check for sparks (blue arc due high voltage). This is a few second test, please don't touch anything near the temporary sparkplug it'll shock you, we want a visual inspection. Other test is to swap coil 4 and 6. If you swap 4 to 6 and it works but 4 stops working then you could have a wiring or coil issue.
2. Check voltage on 6th cylinder injector, it should have a voltage if not then check the wiring. You'll need to probably turn the key to accessory (before you crank it)
3. PCV valve
Hope it helps, however the best way is to use a scanner to get the right codes and have a starting point of failure.
Happend to me too. I just went to the local junkyard and they charge me a buck plus other parts I needed. Or eBay, make sure the location is US so shipping doesnt become an issue. Hope this help Good luck