Volvo Repair: 1989 volvo 760 turbo, fuel pressure regulator, volvo 760

Question
Hi,
I have a question over my 1989 volvo 760 turbo. My car turns on sometimes right away and sometimes it doesn't it takes a while or i have to leave the key turned all the way until it turns on and when it turns on it idles ok and then it idles up and down and then settles and then it does it again. It seems like it is getting air but we checked all hoses and they are good. We changed spark plugs, fuel hose, distribuator cap, spark plug cables, and ignition module already. Nothing changed it still happens. Also, it shifts good from 1st gear to 2nd, but from 2nd to 3rd it takes a bit too long  i have to let go of the accelerator so it can shift. I've noticed when i accelerate fast and go fast when it come to shift from 2nd to 3rd it tries to shift  but it cant until like the third or fourth try it shifts. Hope you can help Roger :/

Answer
Jose, check the fuel pressure regulator.  If its leaking fuel from the vacuum port, then there is the problem.  There may be other issues but tests would have to be made.  Back off the kickdown cable for the transmission and see if that helps any.  If not, then you will be dealing with internal transmission issues.  Roger