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Difficult Starting 96 Silverado

rickmac

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rickmac Enthusiast

rickmac

Posted
Posted

hi people hope you can help me my 96 k 1500 silverado with 5.7 is difficult to start when left overnight when cranked it will fire and die if the ignition is left on for a wile it will fire then catch then die eventualy it will run ok if restarted it will run ok fuel pump used to buzz but now i can only here it if under the truck i have changed plugs /leads /dizz cap and arm

and get spark when tested with old plug on block

truck also has lpg system i can start on lpg and turn over to fuel straight away and truck will run fine if turned of and then started again on fuel it will start and run ok

iaam thinking my pump is on its way out any ideas please

beerman07 Enthusiast

beerman07

Posted
Posted

I used to have a 96 and it acted very similar. Occasionally it would also stall when driving until one day it wouldn't start at all. I changed the fuel pump and never had any issues after.

rodram Enthusiast

rodram

Posted
Posted

I have to agree that the first thing to check should be your fuel pump...

 

.. get the fuel pressure checked ... on a Vortec engine (like your '96 5.7L) , the fuel pressure should be 61 to 66 psi

.. my '97 never stalled on me anywhere, but it just got harder and harder to start .... until I got a new fuel pump

 

.. I strongly recommend getting either an ACDelco from the dealer or a Delphi from a good parts shop ... other brands like Airtex are a bit cheaper and less reliable.... and for a fuel pump you really don't want to replace this again anytime soon...

 

...btw, I have an Airtex (from before I knew what the difference is)... and it had to be replaced after 3 months... I was real pleased that the mechanic and parts supplier stood by the parts and labour warranty, so I got it replaced at no extra cost to me... now I just wonder how long this one will last...

  • 3 weeks later...
rickmac Enthusiast

rickmac

Posted
  • Author
Posted

just to update you all dropped the tank today not to bad a job but the good old tin worm has had a jolly old time with the pipes out of the top of the sender and they rusted into the unions when i tried to undo them they rung off so will order new sender unit to go with pump in meen time i will clean and paint tank

  • 2 weeks later...
rickmac Enthusiast

rickmac

Posted
  • Author
Posted

ok further update fitted new sender unit and pump today cured all problems started right up

on inspection i belive the old pump was the original ac delco not done bad at 122000 miles

thanks to the info in this site it was not to bad a job to drop the tank just a bit awkward to put it back up on my own but got there in the end

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