Thanks again for the great advice, Mark! I did replace the TFI about a month ago and nothing changed. The bogging under load remains. The coil has been changed as well along with plugs, wires, Cap and rotor. The gauge I have should reach to the cowl as it has about 3' of line. If you could, please advise on what I should be seeing as far as pressure is concerned under load, idle, etc. As said before I'm getting 32 psi at idle with vacuum connected to the reg, and throttling it with the throttle body, it jumps to 38 and quickly down to 28. That's why I'm thinking replace the pump. I really feel I've installed an 88 lph and it just won't keep up with the 24 lb injectors. Again the regulator is a new stock replacement. Next I'm thinking if the pump isn't the issue, may be a leaky injector ? Again it started becoming hard to start about two weeks ago like its losing pressure through the pump or an injector. Thanks again for your time and advice!