Can't rev over 2500-3000rpm max

[Lofgren__]

Originally Posted by ngoma

So the problem can go away while you're driving it but comes back again after letting the car sit?

Seems to be a bit random, but mostly yes. I often get the problem on my way home from work.
I'll try to explain like this;

• I wake up. Start the car, drive to work. Car works fine, drives like a champ.
• finished work. Start the car. Can't rev over 3k. can't hold full throttle, because then it will only rev to Max 1,5k (sort of bogs?) half throttle lets me go to 3k. If I finnes the throttle just under half throttle hold it for some seconds the problem goes away and then it will work fine for a period of time. (This fix I just sorta found out while driving. Before knowing this the problem wouldn't go away)
• come home, park the car.
• next morning still works (most of the time)

It starts just fine. One crank and it's on.
I have a new filter.
I just now blew out the fuel lines so see if it helps tomorrow.

Only problem I have more than the rev thing is that when the car is working normally and I accelerate hard and go into netrual it'll have very bad idle for a couple of seconds