My 87' 951 started acting up today out of the blue. It runs fine for the most part but every few stops it just wont take the gas when I go to take off. Its like it wants to die unless I rev it up to about 3k and take off from there. Also I was coming around an exit ramp and gave it gas to merge with the traffic and it felt like when your running out of gas and it felt like it was going to die even though I was giving it gas and had plenty of gas. Anybody have any ideas? I looked around and didnt see anything and did find one vacuum leak but it didn't fix the problem. Any help would be great.

 

bump

 

Most likely throttle position sensor.

 

Yup, i would check the TPS