"" wrote: > rob wrote: > > > > I have a 2000 civic dx 5-speed with 85,000 miles. When my > gas tank is > > below 1/4 tank, the car doesn?t want to start. It will, but > it turns > > over a lot. When the tank is full there is no hestiation at > all. I?ve > > replaced the fuel filter, and and gas cap a (thinking a > > vacuum/pressure issue). I?m wondering about the fuel pump. > Any > > thoughts? > > This is my experience as well (94 civic). The workaround is to > turn on > the ignition (but don't start just yet), wait a few seconds > until you > hear the fuel pump relay turn off, then start the car. > > My personal theory on this is that there is a check valve > (well, there > IS a check valve, that part is not just theory) to maintain > system > pressure when the pump isn't running. I speculate that this > check valve > is in the pump assembly in the tank, and that when the tank is > far from > empty, the whole check valve is submerged in gas. Thus the > seals would > be nice and wet, and the check valve holds pressure. When the > fuel level > is low, the check valve sits above the fuel and the seals dry > out and it > does not seal properly.
Your theory is the same as mine. My hearing is pretty good, but I can?t hear anything noticable before hitting the starter. Maybe that?s the problem. HMMMM. I?ll have to draft a outside listener before I condemn the check valve or pump. Thanks to all. :D