I have a standard stanadyne super filter which I moved over from the suburban donor. It developed a leak. I thought it was the filter so I spent 20 bucks on a new one and it still leaked. I pulled the filter, connected a hose from the inlet to the outlet on the housing, ran my newly installed electric pump, (carter pump I had from the nissan engine) found the leak to be coming from the round thing in the middle of the housing. I think its the water sensor ?? I popped it out and the oring broke in pieces. Anyone know where I can get that oring or replacement housing ? I have a fuel filter housing with a NAPA filter on it but its not as cool as the stanadyne. Could the new pump be putting out too much pressure ? maybe my engine feed pump was ok all along and this thing was sucking air causing lost prime. Any how. I am greatful for any input.

Scott

i'm sorry, but this is a very very common problem with the stock stanadyne filter systems used in these trucks, your better off using the one you have or getting a spin on filter set up with water separator. they leak at the water sensor all the time. this is where mine leaked, i also thought it was my electric pump, as i had a stewart warner one. but i went and bought a FLEET GUARD 3311505-S filter head and a FS1221 fuel filter/water separator. since i had an electric pump, this one worked perfect because it had no air bleed in the filter head. they have good cheap filters, plus just a fun fact FLEET GUARD is actually cummins diesel filtration divison so i figured it was good enough for an old beater 6.2:p: hope this helps

i have a factory filter housing and it doesnt leak. but im running the stock mech pump and keeping it that way also i like the light on the dash so ill leave it that way. is the o ring round or does it have square edges? if it is round you might be able to find one in a universal O ring kit

Thanks guys, I was looking at my wiring diagram. it says that the sensor is a fuel pressure sensor. the water detector sensor has 3 wires. I dont know why the system needs a fuel pressure sensor. It does not go to a gauge or computer so I may try to plug it or find an oring that fits or just use my spin on assembly which is more rugged.

The pressure sensor turns on the "Water in Fuel" light when it senses the filter begin to swell up, as it becomes restricted with foreign material or water. The slight swelling of the filter body pushes on the pressure sensor and turns on the light.

outstanding... thanks for that answer.

Did some searching and found a paper that said that GM had a bulletin that instructed technicians to remove the pressure sensor and tap the hole and install a screw in it. I am going to try that. I think its a good idea.

removed the sensor, tapped the hole, installed a screw, potted it with silicone, no more leaks.