Chevrolet problems?

Question

i have asked afew previous questions and Now i am wondering about the fuel sensor. Here's my original question:
I have a 97 chevy silverado and it wont start. I know it has something to do with the fuel system, but i cant figure out waht. I hear the fuel pump workin when it turns over. It starts for a second when i put gas in the throttle but then it bogs down. This problem just appeared over night, one day it worked, next day it didnt. I replaced the fuel filter, i dont know what it could be

Answer 1

Different "stab in the dark" it may not necessarily be a fuel problem. If the problem happened "overnight" as you say, being 9 years old, I would look more towards a timing issue, sounds like the timing jumped a tooth. If you need to keep the throttle floored and it sounds like it's bogging down, and when you release the throttle it dies, have the timing chain checked. Timing problems happen suddenly, usually when you shut the engine off. if the last time you turned it off it shut down abnormally, I would not look at a fuel issue.

Answer 2

It sounds to me like you have throttle body injection. These are very similar to a carburetor in appearance, but that's where the similarity stops. Under the hood, before the throttle body, you will have a fuel pressure valve. Between that and the throttle body you should see something that looks like a tire valve. With the key OFF, take the cap off this unit and depress the little stem that's in there. You should see fuel release from this point. If not, turn the key to the ON position and LISTEN for the fuel pump. If you hear it, try the first step again. Be VERY careful this time, the system is under high pressure, and gasoline, not only flammable, if gotten in your eyes, can blind you. It will, if nothing else, make you wish you had been MORE careful. Ever poured alcohol on a cut?? If you don't hear the pump, have someone try to start the vehicle while you BANG on the tank with a BRASS hammer. Do NOT use a steel hammer. If you cause a spark, well....we won't talk about that. If it starts, and continues to run, shut it off and go buy a fuel pump. If, after checking to see if you have fuel at the point previously mentioned, and there is nothing, your fuel pressure regulator is most likely the cause. If you get a spray of fuel, check the connectors on your injectors. Sometimes they wiggle lose. You might be able to rent a set of NOID lights, if not, purchase them. These are used to check whether or not you have voltage at the injector. You simply plug one into the connector and turn your vehicle over. If it pulses, you have electricity at that point. Whatever the case, good luck. Remember, it's a Chevy, so it won't stay down for long.

Answer 3

You have a "CSI" fuel injection system. All the injectors are under the upper intake manifold. Looking at the engine in the right rear there are 2 3/8" inch metal fuel lines, one of them has a schrader valve on it (large plastic cap on a fitting like a tire valve stem). There should be fuel pressure at this fitting when you press in the valve core (like letting air out of the tire). There is alot of pressure 60-66 pounds, so be careful when you press in the valve. The fuel should squirt out with alot of force. If it just dripples out, time for a pump. The pump is inside the fuel tank as you know.

Answer 4

see if someone can check the fuel pressure.the pump may be working but not putting out enough psi.
also this may help narrow down if an injection problem or the fuel module

Answer 5

i just looked at all your questions and answers if this is a truck at the dealer we dont drain the tank we pull the bed off and change the pump it is perty easy if it is a surban or you dont want to pull the bed remove the large inlet hose and siphen or pump fuel out of there

it does sound like a pump
i am on my way to do one on a honda now good luck

Answer 6

Try a throttle body/fuel injection cleaning. Deposit bulidup on the throttle plate can cause what you are describing.

Answer 7

this is just a stab in the dark...could be any number of things...if it is water some other contaminant, do not keep cranking the engine...you are just fouling up the fuel injectors. have it towed...you will save yourself a lot of $$$ in the long run

Answer 8

replace the fuel pump

Answer 9

You may want to check the feul pressure. If the feul pump is working proplerly you should be getting plently of feul pressure.

Answer 10

feul injector cleaner &check feul pressure then check fuel line &then check computer cuz it will tell the truck to stop firing