I have a 140 gph electric pump such as this:
http://www.ebay.com/itm/High-Flow-Pe...5UR99~&vxp=mtr
Cheap $50 pump, probably from China. I have it in the trunk floor. I drilled through the trunk floor plastic plugs and got the fuel lines in and out, carefully shielded from the left exhaust pipe. I also have a voltage regulator.
In the process of tuning the car since last April, this set up has been giving me all the fuel pressure I needed. I had a good 7 psi at WOT testing. Recently, in a little local road trip, I noticed the pressure going down to almost nothing at long red lights, restoring quickly as the car moved, but some hesitations aftetwards, even with good fuel pressure, presumably due to vapor in the lines. Then, further testing shows that at WOT I lose fuel pressure. I thought may be the warm weather with winter gas (pump does get warm, even though away from engine heat), but drove the car with 40 F (that's cold around here) and the gasoline cold, and still the same symptoms.
I will raise the car and check the fuel lines under the car again, but its doubtful that anything is wrong there. May be some debris is in the pump. I will open the flange and check. Any other guesses? Anybody else has experience with these style pumps?
Thanks
http://www.ebay.com/itm/High-Flow-Pe...5UR99~&vxp=mtr
Cheap $50 pump, probably from China. I have it in the trunk floor. I drilled through the trunk floor plastic plugs and got the fuel lines in and out, carefully shielded from the left exhaust pipe. I also have a voltage regulator.
In the process of tuning the car since last April, this set up has been giving me all the fuel pressure I needed. I had a good 7 psi at WOT testing. Recently, in a little local road trip, I noticed the pressure going down to almost nothing at long red lights, restoring quickly as the car moved, but some hesitations aftetwards, even with good fuel pressure, presumably due to vapor in the lines. Then, further testing shows that at WOT I lose fuel pressure. I thought may be the warm weather with winter gas (pump does get warm, even though away from engine heat), but drove the car with 40 F (that's cold around here) and the gasoline cold, and still the same symptoms.
I will raise the car and check the fuel lines under the car again, but its doubtful that anything is wrong there. May be some debris is in the pump. I will open the flange and check. Any other guesses? Anybody else has experience with these style pumps?
Thanks
