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You have changed both fuel pumps and filter you have also checked for spark and have a good spark The question is what would make the truck not start?
Wiki User
∙ 16y ago
If fuel pump is electric, is it wired correctly? Did you install fuel filter correctly (they are designed so fuel only travels in one direction, if it's on backward, fuel will not flow to engine.) You dont state year...engine... so on... i assume since u said "both pumps" that this is a fuel injected truck.... so spray starter fluid in the intake while an assistant tries to start it. if it starts then you have narrowed down the problem (take out spark and timing issues)..
lets say you got it to start..some... check that fuel is getting to the fuel rail...there is a valve...like a tire inflater valve on the fuel rail... press a small screwdriver in and see if fuel flows out...
if not ... fix that
(do you hear the fuel pump hum from the gas tank when the key is turned on..not cranking just on...open the gas cap and put ur ear up to the hole when the assistant turns the key on...should hear it for 4 seconds or so) ... if yes then i would go 2 places....1 ..ouch... computer is not working right and injectors are not firing.... 2 and its a strange one... the return fuel line is pinched or blocked .... this line allows excess fuel to return to the fuel tank.... 2 much pressure and the injectors wont fire.... hope this helps
Wiki User
∙ 16y ago
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