first REAL car problem...bad bucking!

[adrial]

Today, I drove to a little local car meet...parked...drove for 30 secs (probably spent more time idling than driving)..parked for an hour...drove home. About 5 mins into the drive home...it started bucking very badly.

At first, it was only if I brought it up to a certain throttle position (which yielded less than 1 bar on the gauge..atmospheric pressure..call this situation #1)...then it just wouldn't go anywhere period for like 10-15 seconds...After that it went back to the way it was before that (bucking at above a certain throttle position). The only time I tried WOT was when it was doing situation #1...car didn't go anywhere...but it did hold 1 bar on the gauge...

Thankfully I got home and parked her in the garage...

I am thinking TPS, someone else suggests fuel pressure regulator? Any thoughts? I already have a TPS on order from paragon, but if I really need it I can get it quicker from my mech (they order it, its there the next day).

I don't wanna drive the car anymore out of fear of getting stuck somewhere...

Also, I noticed that my vac leak was much more of a sharper hissing sound when I started it up tonight...meaning I guess faster air flow (bigger leak). The hissing is coming from the AFM area (or it was, I haven't checked again yet)...but the AFM is solid, carb cleaner did nothing. So I and 2 mechs determined it was normal. However, if I disable the idle stabilizer, the idle drops to 400rpm...the idle screw can't raise it but can lower it further.

Help me!

thanks,
Adrial

[adrial]

It was the fuel filter.