I have a 97 3500, 5 speed, 130k. mi. #2 janetty plate. On initial start up vehicle runs fine except it will not accelerate properly. No throttle response, will only build about 10 psi boost-no smoke. If you jab the throttle numerous times it will come out of it and run fine till you shut it off and start it again. It has 22 psi fuel pressure at wide open throttle. Any suggestions?