I just replaced a 22re in an 1986 4runner with a 22r out of an 1985. Switched everything over, intake, sensors, brackets, evrything. Go to start it and it will fire and run for a few seconds then die. It won't start right back up, but if you let it sit for 2 to 3 minutes it will fire up again. But same old cycle. I can hear the flapper in the airbox opening and closing as I try to give it gas. If you let the engine set a few minutes and then crack the fuel line all pressure is gone. If you crank engine while fuel line is cracked lots of pressure. Just need to know where to start. Any help would greatly be appreciated. Thanks Jeff