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Truck won't start

DavidWM71

By DavidWM71
in Ask A GM Technician

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DavidWM71 Enthusiast

DavidWM71

Posted
Posted

:seeya:

 

(truck model and make in sig)

 

When I purchased my truck the fuel pump was very loud. We have Chevy vans at work and when the pumps started running loud it wasn't long before it stopped working so I expected my truck to have the same problem. A month went by and one day the truck wouldn't start. The pump wasn't running when I turned the key. After checking fuses and relays I changed the pump and everything was fine... for a while. After about 3 or 4 weeks, all of a sudden, with no warning, the truck wouldn't start again... same symptoms. I changed the pump again and test drove the truck. I then did not use the truck for 3 weeks until today. I drove it around a little ( maybe 20 miles or so ) Not continuous running but 4 or 5 different trips to different places. WELL.... on my way home about an hour ago the truck stopped running on the highway. Same exact symptoms, it cranks but won't start. This time I hear the pump come on when I turn the key but there is no fuel pressure at the engine. My truck is now sitting in a parking lot about 5 miles from my house. Any one have any idea what could be causing this problem? Seems like something is eating fuel pumps. Why would this happen? Could it be possible that my fuel filter is clogged causing the pump to overwork and burn out? Anyhelp is appreciated. Thanks.

GM-Tech Senior Enthusiast

GM-Tech

Posted
Posted

By the third pump I'd be saying, "hey, maybe it ain't the pump" unless you're buying some cheesy aftermarket part.

 

Lots of wiring involved and when the first pump went, high amperage draw can often overheat connections.

lucky13 Enthusiast

lucky13

Posted
Posted

change the fuel filter to start

if you have the thaught that it may be clogged

than it proably has'nt been changed in a while

its proably not the problem but it definitly won't hurt

also i have had bad luck w/aftermarket pumps buy a gm part

 

how do you know you have no fuel psi.

is your guage good

do you have injector pulse

will it run if you shoot some brake clean down its throat

let us know

DavidWM71 Enthusiast

DavidWM71

Posted
  • Author
Posted
change the fuel filter to start

if you have the thaught that it may be clogged

than it proably has'nt been changed in a while

its proably not the problem but it definitly won't hurt

also i have had bad luck w/aftermarket pumps    buy a gm part

 

how do you know you have no fuel psi.

is your guage good

do you have injector pulse

will it run if you shoot some brake clean down its throat 

let us know

 

 

 

 

 

The truck has 127000 miles and the first pump I changed looked stock. I am assuming the fuel filter hasn't been changed for a while, I've only owned the truck a few months.

 

My friend is a mechanic and he was checking under the hood. He checked fuel pressure at what looks like a Schrader Valve located on top of the engine. Nothing came out except an aroma of gas. I know there's gas in the tank because when we changed the pump it was half full and the gauge says half full and I've only driven about 20 miles or so since changing the pump.

DavidWM71 Enthusiast

DavidWM71

Posted
  • Author
Posted

I tried starting it again yesterday and it actually sounded like it wants to start. I aam going to change the fuel filter when I get a chance.

  • 2 weeks later...
DavidWM71 Enthusiast

DavidWM71

Posted
  • Author
Posted
I tried starting it again yesterday and it actually sounded like it wants to start.  I aam going to change the fuel filter when I get a chance.

 

 

 

 

 

Changed the fuel filter the other day but didn't try to start it. I tried to blow through the filter and there was ALOT of resistance. I realize once the filter inside gets wet it may have some but this was alot. I cut it open and it was VERY dirty. I dropped the tank again and I am going to clean out any debrii andsediment in the tank and change the pump again.

DavidWM71 Enthusiast

DavidWM71

Posted
  • Author
Posted
I tried starting it again yesterday and it actually sounded like it wants to start.  I aam going to change the fuel filter when I get a chance.

 

 

 

 

 

Changed the fuel filter the other day but didn't try to start it. I tried to blow through the filter and there was ALOT of resistance. I realize once the filter inside gets wet it may have some but this was alot. I cut it open and it was VERY dirty. I dropped the tank again and I am going to clean out any debrii andsediment in the tank and change the pump again.

 

 

 

 

 

 

installed the new pump today and drove around for a while. At this time it seems like everything iss working. I'll report back in a few days with an update.

DavidWM71 Enthusiast

DavidWM71

Posted
  • Author
Posted
I tried starting it again yesterday and it actually sounded like it wants to start.  I aam going to change the fuel filter when I get a chance.

 

 

 

 

 

Changed the fuel filter the other day but didn't try to start it. I tried to blow through the filter and there was ALOT of resistance. I realize once the filter inside gets wet it may have some but this was alot. I cut it open and it was VERY dirty. I dropped the tank again and I am going to clean out any debrii andsediment in the tank and change the pump again.

 

 

 

 

 

 

installed the new pump today and drove around for a while. At this time it seems like everything iss working. I'll report back in a few days with an update.

 

 

 

 

 

 

Couple days later... everything seems to be working fine still. Now I need to replace the trailer connector ( cover broke ) and put her up for sale.

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