My carter lift pump that I move to the frame gave out. I have the big line kit going back up the the engine and I was getting about 13 psi at idle. (this set up lasted about 1. 5 years) It would drop down to 7-9 when I got into it hard. the other day I started it up and happened to look down and it was under 5 psi and kinda going up and down. not good. I installed a airtex pump now I have 15-17 psi at idle and it does not get under 10. The other nice thing this pump is almost silent. time will tell how this pump will hold up. fuel psi gage saved the day again!!