Question about Cars & Trucks
1998 GMC K1500 Sierra SL 4wd it start and rans great but after it sits for 6 to 8 hours it crank over and over like it isn't getting gas I hear the fuel pump when it turn the key but it still won,t start and then if it sits for a 1hr some time it start and some time it done when it does start it rans great any help would be great new sparkplugs new rotobutton new cap new wires
The first thing i would check is the fuel pressure. the fuel pump may be running, but that doesn't mean that it is putting out the right amount of fuel
Posted on Jul 30, 2013
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Posted on Jan 02, 2017
had this problem on my neighbors 98 chevy truck with the same engine !!
it turnd out too be the fuel pressure regulator,you have too pull the upper intake too replace it!!
Posted on Jun 06, 2009
It has to be done with a scanner. You can adjust this distributor, but there are no timing marks to watch as you move it. There is a timing mark on the balancer and on the timing cover for referencing Top Dead Center #1 cylinder only, but it is only used for dropping the distributor in to get the engine up and running. A scanner is needed to properly adjust the timing. Connect the scanner and look for a data parameter labeled ‘cam offset’ or possibly ‘cam ******.’ It will be listed in degrees. Start the engine, and bring it up to 1500 rpm. Note the reading. If the timing specification is not within plus or minus two degrees of zero, you need to move the distributor. You can move the distributor with the engine running but the timing will not change. After you move the distributor, the ignition has to be cycled off to let the computer learn the new timing spec. Restart the engine, bring it up to 1500 rpm and see what the new spec is. You must repeat this procedure until you get the timing into the specification as mentioned above. Once you have it set to spec, the code should clear.
Posted on May 18, 2008
Hey there boatright33,
A few things things immediately come to mind.
There may be a problem with the engine controller. You could check the ODBII onboard diagnostics. Auto part stores will usually do this for you at no cost.
When you pulled the ones that were/went bad, how did the filters look? Could there be particulate matter still in the tank causing them to fail.
I always put this one off until last. Check the injectors. Are they gummed up?
Let me know what you find out
Posted on Aug 12, 2008
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