This truck surges a few hundred rpms during warm up. It also takes a very long time for the truck to warm up. Engine temp. will hard start to climb after 15 minutes of running. Engine is 3.9L fuel injected and our mornings around here have been about 0 degrees F. Changed out the thermostat and even checked the old one in a pan of boiling water. Thermostat opened just before water boiled and is marked 195 degrees same as the one I replaced it with.
- posted
17 years ago