Originally Posted by milehighmaro
When I am cruising on the freeway I noticed that I run very cool, just a little past 160. Sitting at stop lights it will eventually climb. Just wondering if im getting too much cold air?
You might have a 160° thermostat, however temp fluctuation / temp rising when sitting is normal in 4th gens. The fans don't always run.
Low speed fans
The PCM will complete the ground path for cooling fan relay #1 under any of the following conditions:
• When engine coolant temperature exceeds 105°C (221°F).
• When A/C is requested and ambient temperature is greater than 10°C (50°F).
• When A/C refrigerant pressure is greater than 190 psi (2 volts).
For high speed cooling fans operation, the PCM will delay control of the cooling fan #2 and #3 relays for 6 seconds. The 6 second delay ensures that the cooling fan electrical load will not exceed the capacity of the system. The PCM will complete the ground paths for cooling fan relays #1, #2, and #3 under any of the following conditions:
• When engine coolant temperature exceeds 113°C (235°F).
• When A/C refrigerant pressure is greater than 275 psi (2.9 volts).
96 T/A, Black/Graphite Leather, T-Tops, 6 speed, 10 speaker Delco/Bose "Monsoon"
Original owner, 193k miles and counting.
Total engine rebuild at 187,020 miles. AIR delete, bored .030 over.
Comp cams Xtreme Energy LT1 266HR-14 street cam and springs.
Custom leather interior at 190k miles.
In the paint shop now.