I have a 1992 3.1 V6. My Heater has been bypassed and and I want to get it back worink again. I also need to get my air conditioning going. I think it just needs refridgerant, but I dont know if I have any leaks. I dont want to put any in and there to be a leak, so how would I check that. I need to get the air condition and heater working before Jan 31st. Also my car doesnt start on the 1st time I turn the key, but it does on the second time. Whats up with that?

 

On the heater, You should be able to just replace the heater hoses and press on. The A/C should be looked at by a Pro.

 

Starting problem:
Most likely the FI system is not holding pressure when the engine is not running. Probably due to a leaky injector, bad pressure regulator, or bad fuel pump check valve. For a quick fix, turn the key ON & OFF a couple of times before engaging the starter. This will prime the system & bring up the fuel pressure to where it should be.

AC:
If it is a small leak, it is going hard to detect without a proper equipment, and you should see a service shop. Your system runs on R12 refrigerant which is no longer made, & what is left is very expensive and not available to the public. You may want to consider using a substitute refrigerant such as Freeze 12, which is an environment friendly and available to the public. Get the retrofit kit otherwise you wont be able to attach the special recharge hose. Do not recharge with R134 as it requres modifications to the AC system to work effectively, and still does't work really well on the old systems.