Fires but dont start

[Joey laswell]

I have a 1996 Chevy SIlverado K1500 4.3l.

It keeps eating up fuel pumps. This make the fourth one in 6 months. I changed fuel filter and stainer twice. I've dropped tank and cleaned it out. But still i put in new pump and it runs fine for about a week then i get a little miss then it slowly gets worse. Tell about a month goes by and it wont start at all

[silveradosid]

check the ground wire for the pump maybe corroded and causing the pump to draw to    much current

[diyer2]

Agree with silveradosid. There is an electrical problem. Check that.

What type pump are you using?

Go with OEM from a dealer. This is the recommended part if you research it. 

 

[green 788]

I found out there is a GM tech bulletin that has you change the plug for the fuel pump.  They'll sell you that little plug with the wires for the low, low price of 45 dollars.  :/   The factory plug has male/female terminals that are too prone to corrosion, and loose connection... so there's a upgrade that you have to see the dealer about.

 

My truck is on its 4th pump since I bought it used 9 years ago. It's a dually 3500 4x4 with the 350 so it sucks gas... 30,000 miles on this truck requires the fuel pump to do as much work as most trucks do in 90,000 miles.  :o

 

I think you need to change that wire, and go with a good pump... but I've had Delphi, Bosch, and one other one fail I can't remember the name of... there's a Air Tex or something like that in my tank now... loud, not a great rep on the inter-webs... but it's working now for 2 years.

 

Agree above with the ground wire, it goes under a bolt on the frame, and if the ground is poor, the pump will work way too hard to do its job.  Find that bolt, remove it, clean with sand paper around the area, and get a ground washer (with the serrations like teeth to cut into the steel when you tighten the bolt down) and if the eye terminal on the end of that ground wire is corroded looking, it'll need to be changes (or just cut it off and strip the insulation back, coat the wire in grease and wrap it around the ground bolt clock-wise a couple times and it'll ground well)...

 

A mechanic friend of mine showed me a pump he had changed out in a early 2000's Blazer... the pump wasn't actually bad, it was the plug *inside* the tank, on the pump motor wires... voltage good above the plug, no voltage below it--so that plug's connecting terminals oxidize or whatever, and the pump stops.   Next pump I install, I'm going to hard-wire around that little plug and seal the splice with gasoline proof sealer.

 

Dan