Well.... today my car has stumped me. Its broken Here is what it does:

I srove off, everything fine. 1-2 minutes later the car started to stumble around 2.5k rpm in 2nd. When it did this, i shifted to 3rd and again, this time it wouldnt go past 2.5 rpm. Stopped, started, wont go past 2k rpm in 1st. Stop, rev, wont go past 3k rpm. Stop engine, Start again, everything is fine for about 10 secs and boom wont rev again. It gor so bad now that driving it wont go past 1200 rpm working normally, anything more and it hesitates, as if im giving 5% throttle when in giving WOT. reving up in neutral it bounces between 1.5k rpm and 2k rpm. Will not rev higher. Just now i tried it and it would rev in spurts, some longer than others, like this. Im holding wot and cars is doing --->
(just an example, it does this randomly)
REV to - 3k rpm
dies to - 2k
revs to - 5.5k
dies to - 2.5k
revs to - 7k
dies to - 5 k
revs to 5.5 k
dies to 5 k
and on and on randomly sometimes getting really high wher i have to let off, sometimes only to 2.5k rpm. And sometimes it jus bounces. Im completely baffled. Guesses:
AFM
TPS
CAS
ECU?
or......

Its getting spark at idle, might be cutting out when revved tho, not sure about fuel.

 

replyed to your same post in gen specific

 

Clogged cats? I am not sure, prolly could be alot of things. When my cat was clogged in my other car it didn't have very much power at all & eventually wouldn't go anywhere. Any weird sounds?

 

Hmm... Sounds a lot like the MAF connector coming loose. You might want to check your connector, and make sure it's connected securely.

Hope this helps,