I purchased a 1987 camaro. 2 problems, it wont go in 1st gear and the fan only turn on at 250 degrees?

There are three things that’ll switch the cooling fan on, Coolant Fan Switch, A/C Switch and A/C High Pressure Switch. The ECM does not come into play in this system.

When the A/C is turned on, it grounds the cooling fan relay which turns the fan on. When the coolant temperature reaches 238 degrees, the Coolant Fan Switch closes and grounds the cooling fan relay and turns the fan on. When the A/C high pressure side hits 232 psi, the A/C High Pressure Switch closes and grounds the cooling fan relay and turns the fan on.

If you disconnect the wire from the coolant switch and ground it, the fan will run. The wire goes directly from the F terminal of the relay to the A terminal of the sensor. If the engine temperature is over 238 degrees the and the fan doesn't run, it has a bad switch. That's the whole system. So make sure you’ve the right sensor before you replace it.

As for not going into first gear, I’m assuming it is a manual transmission? It is most likely the clutch. To check this (make sure there’s nothing to hit in front of the car) put the automobile in first with the engine off and begin the car. If the automobile lunges forward you’ve a clutch problem. It could also be the syncros in the transmission. This is a more serious problem and will require a transmission rebuild at some point.

Good luck

the 1st gear problem is a tranny issue..gotta get it looked at.