Car struggles to make fuel pressure

thangcu35

I used to have the same problem regarding fuel pressure dropping after it got hot under the hood. I have a liquid filled gauge and the pressure would build up inside the gauge and lower the reading (actual fuel pressure is unchanged). It dropped up to 10 psi when compared to cold start up. I fixed this problem by draining the oil inside the gauge and left the drain/fill plug open. It fixed my problem completely. It's possible your warm start up problem has to do with uprev start up setting and not with fuel pressure.