I replaced the fuel pump, fuel filter, relay switch, & the battery. I bled the fuel line of air via the valve in the back of the engine(just gas comes out now). It cranks over fine but it will not start. I disconected the air flow system & squirted some gas in it & it starts for a second. I don't have a manual on it(no money left) & don't know what everything is. Any help would be greatly appreciated.
Have 1994 blazer 4X4 vortec replaced fuel filter and check for gas at air valve at back of engine . it cranks but no start. tried littel gas throltle body it started for second . also its been setteing up for awhile > isit the fuel relay Thx
I had the same problem try unhooking your vacum hose and then pushing your foot all the way to the floor and not letting up crank it. but dont stop and keep giving it gas. it should start but keep fluttering the gas but dont stop. it will take it awhile to actually stay running w/o you doing the gas but once it does try putting the vacum house back in & it should work. I know it sounds crazy but mine did the same exact thing and this is what it was.
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I had a 1997 s10 4*4 with the 2.8 v6.
mine do that I had to pull the gas tank replace fuel filter plus had to take undo the line from the intake and blow air thru it. Make sure all u're filter are replaced and y u have the tank down replace the fuel pump. I hope this helps u
Have you checked the fuel pressure? There are two different fuel pumps for this vehicle and if you installed the wrong one, for the 4.3 VIN Z instead of the pump for the 4.3 VIN W, Which it sounds like you have a VIN W, It won't start. Also I've seen the harness go bad in the intake that runs the injector. Have you checked for injection pulse at the plug to the injector.
Start with the simple and try spraying some starter fluid in to the air intake tube (where the air filter is), If the engine starts, then your have no ignition issues and that it's going to be a fuel issue. Check the fuel pressure at the shredder valve which is located on the fuel line that goes in to the Upper intake manifold.
There should be 62-65 PSI with the ignition key's turned on Engine not started, if there is less then that. The fuel injectors will not operate to start the engine and your going to have to replace the fuel pump located in the gas tank. Note a dirty fuel filter that is restricting the fuel flow can also do this, so best to replace the fuel filter first before replacing the fuel pump and see if that will get the engine running again. (fuel sending unit)
When replacing the fuel sending unit, don't for get to replace the wire harness from the sending unit to the frame. It's common for the wires inside and insulator to break and will cause low fuel pressure issues for lack of electrical current flow.
If the engine does not start with starter fluid, then there is a good chance that you may have a ICM that has gone bad, coil of a crank shaft sensor that may need to be replaced.
Well, obviously someone didn't tell you the truth because spraying into intake doesn't make the vehicle turn over any better. You have ignition or fuel delivery problem. Start by taking fuel line off at intake and crank engine a couple times catching any gas in a cup or something. If none, then trace fuel line back and under vehicle til you find filter. Should be under driverside midway back on inside of frame. Change this and try test again. If no gas, see if fuel pump is on motor(mechanical pump). Change this and test again. If not on motor then it's in gas tank(electric pump). Most cases the tank has to be lowered to take out pump, careful not to drop, dent or make sparks. Some came with access through the floor so check that first. Normally you can hear an electric pump come on when you turn the key. Good Luck
are you sure the pump you installed is not defective it does happen more than you can believe. If you can run a power to the pump hot line or jump the relay and have a ear to hear if it is pumping, this is what I would suggest.. Good luck
The fuel pump will run for a short time when you turn the ignition key on to prime the line then waits until the engine is running. Check the fuel filter and replace if plugged then check the fuel pressure should be abouve 27 psi
Check the fuse under the dash. Did you replace the inline fuel filter? If not, you could loosen the line going into the filter then turn the key to the on position. The pump should run for about 2 seconds then the relay should kick off. Turn off the key for approx. 5 seconds then cycle key back on and the pump should cycle again. If you get a 2 second burst of fuel each time then the pump is cycling. Install a new fuel filter and check the grounded wire by the tank. Hope this helps. :)