1997 Ford F-150 4.6L
Having troubles with my 1997 Ford F-150 with a 4.6l in it. Never had a problem with the truck, then woke up one morning with check engine light on. Well I ran the code and it was a cylinder 4 misfire. Replaced plugs there seemed to be coolant on the number 4 plug. Well I reset code and two days later it pops back up. Also, my heat gauge was heating up, well I went and loosened up the reservior and heat gauge dropped instantly. Anyone have an idea of what could be wrong?