Engine Performance problem
1999 Ford F150 V8 Four Wheel Drive Automatic 106000 miles
Truck was exhausting a small amount of white smoke on first start up of day. This went on for about 2 weeks on and off. There was no smell other then common exhaust smell of a vehicle running a little rich. No rough idle. I checked the coolant level, it is right where it shold be. I checked for signs of moisture ie. Dipstick and oil cap, all OK Weather had been hot and humid. Truck runs smooth and quietly. I suspected a bad head gasket. Now the weird part. Everything is back to normal, no smoke in the morning anymore. Truck runs fine except still has a hint of rich exhaust.
Hi ytreg, Welcome to 2carpros and TY for the donation
Smoke could be just condensation for the rich smell could be running rich due to the following
1. Excessive fuel pressure can be cause by restricted fuel return line or defective fuel pressure regulator.
2. Defective Oxygen Sensors.
3. Leaking injectors and fuel pressure regulator.
4. Coolant temperature sensor out of calibration.
5. Restricted air intake system.