Question about Cars & Trucks
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Posted on Jan 02, 2017
Fuel pump relay sound bad. Under the hood in the fuse box is the location of the relay. Look under the cover for the diagram to locate it faster. Hope this helps. Please keep me posted. Good luck
Posted on Apr 28, 2009
SOURCE: my 1999 masda 626 won't
check relays/fuses first then the pump if you know how to test it
the pump is easy to test locate any fuel line unplug it tell a friend to make a quick one key turn if squirts fuel then pump is fine
but check the pump relay first to make sure and to begin with simplest
it seems you can tell it is the pump but you don`t know where to start
Posted on Jun 07, 2011
Hi, it sounds like its flooded or the fuel pump and pressure regulator are not holding enough pressure while stopped. This puts air in the system causing a very hard hot start. Think the fuel pump, fuel filter and pressure regulator need to be replaced at this point.
Posted on Jun 25, 2011
SOURCE: 96 chevy k1500 5.7 runs
The problem on your vehicle is much more likely to be the oil pressure sending unit ore the fuel pump relay . The way the systems works is the fuel pump is supplyed by the fuse box fuse #9 but the cirrcuit splits and goes to the oil pressure sending unit in case the relay fails when your drivering the fuel pump will still have a power supply its stupid but its a safty thing that was mandated. If the fuel relay is NG the vehicle will still start but it takes the engine some time to build up enough oil pressure to trip the switch inside the sending unit to send volatge to the starter . Witch means slow starts long cranking times I would check the fuel filter first but realsticly if you don't know if the fuel pump has been replaced or you haven't done it your self this is vary likely the cause of the problem . If you have then try the oil pressure unit
Posted on Jul 24, 2011
wow....the sky is the limit here....i LOVE the 6.0, it pays my bills :)....with that said..there are many possiblities, almost too numerous to speak of...first, i assume you can hear the fuel pump?..try opening the upper fuel filter housing and turning on the ignition key, if filter bowl fills, good!...when you crank it, is it cranking above 500 rpm? thats the minimum needed to start, make sure batteries are strong. when cranking, can you see the oil presure guage rise? does it have the right oil in it? your fuel injectors are driven by high presure oil, without base pressure (what your dash guage would read) the high pressure system has no oil to drive injectors "power stroke". if you have base pressure you really need to have a computer on it to monitor high presure oil when cranking, will need 500 psi just to fier then would jump up from there...it is also possible the FICM, or fuel injection control module has failed..this too needs to be tested with computer, needs to read internal voltages to make sure has45 volts..now the ficm may be covered under emission waranties still...that truck did come with a 5 year 100,000 mile warranty on engine and some componetns are 6 years, based on state sold in...back to the high pressure oil system, in 06 the vehicle had awhat called a snap to connect fitting, or STC. that connects the high p[ressure oil pump to the branch tubes that supply oil to the injectors..that too can seperate with age and cause a no start...it would be in your best interest after chdecking the basics to see you dealer...in comparison the initial diagnosis would be cheap (in comparison) and effective if trying to repair on your own...it will save you much hair on your head!! good luck, hope this helps you...very hard if not impossible to diagnose these without compuiter on it!
Posted on Aug 27, 2011
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