There are probably about 5000 posts about this very subject in the archives.
The clutch hydraulic system is capable of drawing in air without any evidence of fluid leaking out. It usually occurs at the slave cylinder with the original style single seal slave piston. Rodney sells a nice dual-seal slave that works fantastic... if this is your problem.
Originally posted by Patrick waaaaaaay back in 1999:
I'm "glad" to see that I'm not the only one who has clutch problems with their Fiero.
I have a question. Is it possible for air to be drawn into the system at the slave end without any evidence of fluid leaking from the slave cylinder? I continually have a problem with air in the system, but I've been reluctant to replace the slave because I haven't noticed any leakage of fluid. However, every couple of months when I can no longer disengage the clutch enough, out comes the bleeding kit.
I'm getting awfully tired of bleeding this damn thing though. We could probably start a new thread containing just the methods that everyone has individually developed to bleed the clutch hydraulics on the Fiero. My experience has taught me that it is NOT an easy skill to acquire.
[This message has been edited by Patrick (edited 11-10-2014).]
I did some more testing today. While the car is off I can shift through the gears fine but once the car is started I'm unable to shift into any gear, in either case there's no clutch pressure. Fluids are fine, don't see any leaks and the slaves moves freely when stepping on the clutch. Any thoughts?
[This message has been edited by jc8367 (edited 11-16-2014).]
It was the slave cylinder, changed it and everything works but an odd thing happened during my test run. After about 5 minutes of driving the check engine light popped on for a few seconds and then turned off. Not sure of the relationship between the two but I'll keep an eye on it.
They're not related. The clutch has nothing that feeds info to the ECM. Sounds like a code 32 EGR emissions system fault. Check to be sure you didn't loosen the vacuum line to the EGR valve while you were working in the engine bay.