cws1807 Posted November 9, 2008 Share Posted November 9, 2008 I recently ordered a brand new Walbro 255lph GSL392 and put on a basically bone stock 78 280z. I'm having an electrical problem that cuts the pump off when the engine gets hot, possibly the stock fusible links, but anyway I know the pumps are supposed to be louder than the stock pump, but this one is the loudest fuel pump I've ever heard. I wrapped two layers of foam rubber insulation around it and there was little to no change. When I wired it up for the first time I checked the wires with a meter to find positive and ground, but I must have got a bad reading and the pump was wired up backwards and ran several times before I figured out the problem. Could this have fried the pump? cliff notes: Brand new Walbro 255lph GSL392 extremely loud, accidently ran in reverse for several minutes, could this have fried the pump? Quote Link to comment Share on other sites More sharing options...
a6t8vw Posted November 9, 2008 Share Posted November 9, 2008 i heard there were some knock-off pumps going around, idk if this is your case or not. Where did you buy it? Quote Link to comment Share on other sites More sharing options...
cws1807 Posted November 9, 2008 Author Share Posted November 9, 2008 I got it from summit racing, and they usually have no problem with returning parts Quote Link to comment Share on other sites More sharing options...
Scottie-GNZ Posted November 9, 2008 Share Posted November 9, 2008 Something does sound right. I just installed 2 GSL392s and when I fired up he car for the first time i had to reach under the car and touch them to make sure they were both running. Quote Link to comment Share on other sites More sharing options...
GeeZ Posted November 9, 2008 Share Posted November 9, 2008 I was told by several on-line sellers that the Walbro pumps carried no warranties, so I wonder about Summit, since they are a major seller. Good luck returning it. Quote Link to comment Share on other sites More sharing options...
slownrusty Posted November 9, 2008 Share Posted November 9, 2008 Something does sound right. I just installed 2 GSL392s and when I fired up he car for the first time i had to reach under the car and touch them to make sure they were both running. +! on Scottie's comments. My GSL392 is not very loud at all. Summit WILL take it back as well. Yasin Quote Link to comment Share on other sites More sharing options...
big-phil Posted November 9, 2008 Share Posted November 9, 2008 I like the cliff notes!! Quote Link to comment Share on other sites More sharing options...
cws1807 Posted November 9, 2008 Author Share Posted November 9, 2008 Would the 190lph walbro be any quieter than the 255lph (gsl392)? Quote Link to comment Share on other sites More sharing options...
Flexicoker Posted November 11, 2008 Share Posted November 11, 2008 I've got a 225LPH external, maybe the gsl392, and it is freaking loud. I can hear it over the exhaust at idle. It seems like it got louder after it had been in the car for a week. I don't know if I just got a bad one, or if its due to something in the rest of my fuel system. Its getting a steady 12+ volts, but the feed and return lines go into the stock location/diameter bungs on a '73 (carburetor) tank. Quote Link to comment Share on other sites More sharing options...
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