My blazer has just killed it's fourth pump with only 150miles on it while pulling the boat!! The ground looks good, but when we remove the pump their burnt black! Any ideas??

 

Forgot to mention it's a 96 blazer with a 4.3l

 

Check to see if it is shutting off when you turn off your truck. I have heard of the relay sticking intermittently.

 

nop, it turns off. I think I'm just going to put an external pump on it. When I came back from vacation the pump was not working again. This one only had 20 miles on it!!

 

Mine is on its 3rd since I've owned it. 3 weeks after I bought it, it went out. Replaced it, and a week later it went out when I was 1000 miles from my house(went to AL from IL) but luckly the pump was under worranty.
chris

 

Do you run your blazer low on gas a lot?? The gas that flows through the fuel pump is actually used to cool it down also. Sometimes if you run them on low fuel a lot they will burn up more quickly. Not sure if that is the problem but just an idea.

 

I just noticed you said your last fuel pump lasted 20 miles so obviously its not cause your running it low on gas. I would double check your ground. I dont know what to say other than that.

 

i filled up every 200 miles going down there. so it still had plenty of gas.
chris

 

Well I finally got it replaced another time and this one lasted about 100 miles! I had a fuel pressure gauge in my dash to see if pressure ever went up or down, and I also had voltmeter on the wire from the pump and until the pump went it was always at 12.5 volts. At this point ac/delco does not want to replace the pump anymore so I have to buy another one. The ground has also been redone. At this point I'm running out of ideas!