Need Help with 2003 Ranger 4.0 llitre
Just wanted to say hello to everyone, I am new to the site and I know there are many Ranger Enthusiasts here and I am hoping that someone can help me with my problem. I own a 2003 Ranger FX4 , been a great truck up until a few days when I got a check engine light that was blinking after start up. I am a fourth year apprentice and I work on my own cars. I scanned the truck and it came up with misfire codes for cylinder # 1, 2 and 3 , all on one side, Now this might be a coincidence but I also had no heat at that time. I checked for vaccum leaks and intake leaks , no problems found, I did a compression test on cylinder 1 and it fluctuates and the highest reading I ever get like 90 psi ,at times ever drops down to 40 psi hence its an internal issue. I also hear the chain ratlle on ocassions. My first guess the chain given the fact that Ford has issues on the older 4.0 SOHC engines. I did a coolant pressure test and it holds pressure and no leaks detected so that kind of rules out a head gasket issue. The mileage is current at 331,000 kms which when converted would be approx 205,000 miles. Has anyone come across any problems or guide me as to what to do next. Your help is very much appreciated.