OK so I have an 85 f150 with an 87 302 fuel injected motor in it. While its in neutral I can rev the engine all day with no problems. Put it in drive and it takes off and when I get to about 45mph the engine goes down to a low idle n when you hit the gas it does nothing. Sit for 30 sec to a min and hit the gas it'll take back off but when u get over 8mph it does the same thing over and over. I changed fuel injectors thinking they were dirty they kinda were but didn't help. I'm at a loss of where to start now. Any help would be much appreciated.

 

What's the fuel pressure at ? I'm wondering if it feels like running out of gas ?