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Re: blazer 98 4x4
I would check the basic things first. Battery Terminals, the Battery itself, gas in the tank, then the probable cause a faulty fuel pump. A quick check of this is to take the air horn t-nut off the 3 inch t handle screw which holds it and spray starting fluid in the throttle body. Do not open the throttle body like an old careburator just spray it in their, put the air horn back on and if it starts it's a probable fuel pump. You can also try to turn on the key three times but do not start it those three times just see if the fuel pump sounds like it's working. On the third try turn the key fully on and if it starts it's a probable fuel pump. If so Google under 100 dot com and they have blazer fuel pumps for 60 or 70 dollars. A fuel pump from an auto parts store will cost you from 250 to 300 dollars. I wish you the best of luck becuase I have replaced four fuel pumps in my own blazer. Good Luck!!!
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This could be to a worn resistor pellet in the key that is for the VATS system (vehicle anti theft system) that will not allow the injectors to pulsate. They may also be clogged, if you can remove them try soaking in fuel injector cleaner for awhile and try again. To test the key, swipe the resistor pellet on your jeans and try again.
Need more info.......It could be the injectors are not pulsating...Check to see if it is spraying fuel from the injectors....If not it should be a clogged fuel filter or a fuel pump....It is almost definite though that it is the fuel pump/sending unit in the tank ...IF it is not spraying from injectors....
Disconnect battery remove main fuel line going in the fuel filter under vehicle frame at drivers side..with drain pan under it of course...Reconnect battery turn engine over and watch for fuel...
You will need an assistant...Most people think fuel is under great pressure but it is not.....If everything works the fuel will come out in a stream...But it wont come out like a bullet...
If fuel comes out Fuel pump in tank is good...Then your problem is at the injectors ...I would change the filter of course anyway...unless you just have...You will see rusty dirt come out of it if it is clogged...It is always good to change fuel filter every 15,ooo....Todays fuel is terrible...I would first check or swap fuel relay with a new relay or identical relay in fuse power block ...Make sure they are all good....................What engine and how many miles ? Hope this helps....Metalpoet
there is i fuse for the injectors 1 wire feeds all 6 it is 12 volts there are 6 wires leave the ecm and feed the pulsation of that injector when its needed . if injectors dont work check fuse first the wires from ecm to wire loom to injectors
At injector's, need to check if you have ground pulsation, to check, connect test light on pos (+) battery terminal, now your set to check ground, at injector harness, probe wire's, while some one cranks engine, look for pulsation, if you don't have pulsation, it will need a computer, injector pulsation is control by the computer, if no pulsation, then no fuel can get into cylinder.
Try squirting some starting fluid in the intake and see if it starts if it starts then dies its lacking fuel this could could be that the crank position sensor could be bad. Do you have any codes and have you had them extracted( check engine light is on).the fuel pump may be working and you may be getting fuel up to the fuel rail but if the injectors are not getting the signal to pulsate you will not get any fuel in the intake so check the crank position sensor.Try this first if this doesnt do it check the timing how many miles are on the vehicle if it has high milage it may be in the timing belt. If this has helped you please rate my assistance towards you thank you.