When i start the car and hold the key turned it its starts for split second then try to shut of. has long had o hold the key in the turn pistion it well do the same thing untill i drain the battery. then i have to jump the battery again. some one said fuel pump and i wass told on htis car it has two fuel pumps. so if thats the case shouldnt one of them still work to push fuel to the engin.
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Shut the truck then put the key in the door turn it right for ten seconds and hold it after ten seconds turn it left an hold ten seconds then unlock the truck and try to start agin this will reset the theft system
IT IS LOOKS LIKE A FUEL PRESSURE LEAKING INSIDE THE ENGINE OR DEFECTIVE FUEL INJECTOR LEAKING . TRY DISCONNECTING THE FUEL PUMP RELAY. AND CRANK THE ENGINE IF ALWAYS CRANK WITH OUT OF FUEL (CRANK WITHOUT START) YOU HAVE FUEL LEAK INSIDE THE ENGINE
REMOVE THE INJECTORS RAIL UP EVERYTHING CONNECTED,PUT BACK THE FUEL PUMP RELAY TURN THE SWITCH ON AND FIND WICH ONE IS LEAKING. (GASOLINE IS FLAMMABLE TAKE CARE)
Does the starter crank the engine over? If so, check for spark on a spark plug wire when cranking. If you have a strong blue spark, ignition is probably good. Check fuel pressure. Do you hear the fuel pump turn on for 2 seconds when turning key to on?
Have you tried cycling the key a few(3-5) times, before cranking(and trying to start it? What i mean is turn your key on, then off, and on, then off(3-5 times), and then turn the key back on, and try to crank/start the vehicle, See what that does!
If that works then you have a fuel leak somewhere.
if that DOES'NT work, fuel is leaking into your engine while it sits (more than likely bad fuel injectors!)
You are dealing with 2 possible problem. The ignition switch,or the alarm, If you have a alarm problem the vehicle will crank then in 2 seconds shut down,this is because the key is recognized,now if this is the problem roll down a window and disconnect the negative battery terminal,put the key in the ignition but in the off position.After 5 minutes reconnect the battery and turn the ignition on but dont crank the engine leave for 1 minute. Then see if that resolved the issue.Now if its an ignition switch problem crank the engine and slowly let it go.try to keep the key in the position where it stays running. By the way there is a campaign of a recall dealing with a TIPM software update Re-configure ,anti-theft system. Customer satisfaction notice G42. You will have to see the dealer for this campaign.
A very common problem on the 99 S10 is a leaky fuel pressure regulator in the intake plenum.What happens is when the truck sits for a few hours or more the regulator leaks all of the fuel in the fuel injection system into the intake air plenum. This does 2 things, 1 it has no fuel pressure when starting and 2 it floods the air intake with raw fuel. Sometimes if you turn the key on wait 3 seconds then turn key off then turn key back on and just turn key to crank starter for a split second and wait 3 seconds.do this 3 times to repressurize fuel system then crank to start(you will hear fuel pump buzz each time you do this.also you may have leaky fuel injectors. Try to crank engine with the gas pedel to the floor. This will tell the computer to stop spraying fuel trhough the injectors and it will start. Joe ASE Master Tech