I just got a new holly blue fuel pump but when I unhooked the stock lift pump I found that I didnt know which wire was the hot wire and which was the ground. Can anyone help. Thanks.

 

Yellow'ish wire is positive. I just installed a holly blue yesturday as a pusher pump. Pleased with the results so far.

 

I am new here but have been reeding post here for a couple of years,it has been very infomative and usefull.Any way I tried the blue holley on my diesel and it work very well for about 15,000 miles then it started lieking fuel.duiring the holidays so I robbed one off my race car to get me by till I could get a new one.The thing is they run good preasures but the seals in them will not handle diesel fuel.I put a high performance Carter on that is rated for diesel.Works just as good so far.I would also recamend moving the pump just in front of the fuel tank ! it will work much better and last longer.

 

Cant say I understand how a seal which is rated for gasoline (which is in effect a solvent) would not be fine, actuallaly better off, with diesel (which is an oil)....



Kevin

 

Me neither