BigOxley Posted September 6, 2012 Report Share Posted September 6, 2012 I have a relay hard wired to my fuel pump. I did a big pull the other the day and the car died. After sitting for about 5 minutes, the car would start up then die about a minute and a half later. Fuel pressure would drop to nothing before it died. Replaced the relay for the fuel pump. The car worked for a while (50 minutes of driving), but then the new relay died. It's on its third relay now. And it looks like this one is going out now. The fuel pump is the new Walbro 416lph E85 pump. The relays are just standard auto store relays. The fuel pump is almost maxed out in the current setup. Any ideas? Quote Link to comment Share on other sites More sharing options...
Furloaf Posted September 6, 2012 Report Share Posted September 6, 2012 Is it fused properly? Check for a good ground? Quote Link to comment Share on other sites More sharing options...
Cordell Posted September 6, 2012 Report Share Posted September 6, 2012 Whats the current draw? If the fuel pump draws more then its rated for it'll burn it out, not sure what the specs would be, but I do know that most hotwire kits come with a large relay. I think the one in my Camaro is a 40A relay but I'm not positive. I'd bet that upgrading from a basic autozone relay to something bigger would do the trick, if it were me I'd buy a universal hotwire kit so the wiring gets upgraded as well. A relay like this http://www.casperselectronics.com/store2/product_info.php?cPath=30&products_id=1095 or preferably this http://www.casperselectronics.com/store2/product_info.php?products_id=675 Quote Link to comment Share on other sites More sharing options...
gbracing81 Posted September 6, 2012 Report Share Posted September 6, 2012 Whats the current draw? If the fuel pump draws more then its rated for it'll burn it out, not sure what the specs would be, but I do know that most hotwire kits come with a large relay. I think the one in my Camaro is a 40A relay but I'm not positive. I'd bet that upgrading from a basic autozone relay to something bigger would do the trick, if it were me I'd buy a universal hotwire kit so the wiring gets upgraded as well. I agree with Scott. Upgrading just the relay can tax the original wiring and possibly cause a fire. Quote Link to comment Share on other sites More sharing options...
BigOxley Posted September 6, 2012 Author Report Share Posted September 6, 2012 yeah, it's an upgraded universal wiring kit and a 40A relay. it's a brand new model of fuel pump, maybe even first production batch. Quote Link to comment Share on other sites More sharing options...
Cordell Posted September 6, 2012 Report Share Posted September 6, 2012 yeah, it's an upgraded universal wiring kit and a 40A relay. it's a brand new model of fuel pump, maybe even first production batch. Then get yourself an inductive amp meter and check its draw under load, that is where I'd start since you've replaced the same part a few times. Quote Link to comment Share on other sites More sharing options...
BigOxley Posted September 6, 2012 Author Report Share Posted September 6, 2012 Then get yourself an inductive amp meter and check its draw under load, that is where I'd start since you've replaced the same part a few times. copy Quote Link to comment Share on other sites More sharing options...
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