I'm trying to replace my throttle position sensor in my 02 cavalier but can't get this big black assembly out of the way. There is one screw holding the bulk of it down, then the clamp around the throttlebody. But before I can pull the entire thing up, I need to get this little hose off the pcv valve. I can really pull at it but it won't move. I don't want to really pull hard and possibly do some damage. There is a spring clamp on there, about impossible to get off. Any ideas?

Heres a picture of what my engine looks like. The hose im talking about is right in the center of the picture on top of the engine.

http://images.dealerrevs.com/gallery...hp?id=42319343

 

Take a pair of slip joint pliers, and squeeze the clamp, then remove hose

 

If the hose still won't come off after doing what Kevinkpk suggests then then cut the hose off and get a new one.

 

I managed to get it off, there was a bunch of oil at the tip of the valve inside creating some suction. Got that black thing off, changed the TPS sensor, and all was and is still good.

Some metal valve looking thing fell off something. It wasn't the valve in the top plate of the engine, it didn't fit anywhere. Car is more responsive and doesn't have any annoying hesitation.

Hose clamps were definitely replaced with easy screw on and off ones.