Anything is possible, but compression is not usually there one second, gone the next like spark or fuel is. Does it turn over? If yes, a compression test would get you strted on a baseline for the engine.

Pull all the plugs, full throttle, and rotate the engine at least 3 times.

130F or 130C...130f sounds too low, 130C too high. Most run a 160f/95C thermostat, which means something like a 180f/110C would be more appropriate.

A fan on all the time will not cause your issue though. I ran with a fan on for 2 years with no issues (My switch was shot, so I bypassed it).

You need to find someone with mechanical experience to help you troubleshoot in a methodical way. The shotgun approach (splattering theroys everywhere) does not work and any car, let alone a Fiero. Not trying to be a Ahole, but that 's the reality.

Answer these questions:

a) Do you have compression?

b) Do you have fuel (pressure, quantity)

c) Do you have spark (out of the plug, and every plug)?

99.9% of engine difficulties have to do with one of the three.

Chay

One more thing. Some of your symptoms point to lack of injectors firing (Loss of a ground at the ecm, or the ecm itself).

The reason I say this is the cold start injector will allow the engine to fire and then die repeatedly. The other injectors should take over, but it sounds like that is not happening.

The injectors have a solid 12V applied to one side of them, and the ecm gounds the other side to fire them. Again, check the 5A fuses going to the injectors, check the injector connector (unlikely) under the intake plenum, check the ecm ground (The ecm can't complete it's circuit if the ground is broken), that kind of thing.

There is also a device called a 'noid' light which can be plugged into an injector connector to verify the ecm/injector action.

Injectors sould audibly click if you have a automotive stethescope on one at the time. The difficulty with all of these ideas is that the fiero injectors are burried due to a crappy intake plenum design.

Chay