Was thinking the same as Stephen. I had this problem with a 95 blazer a couple months ago. It will appear to have enough pressure just by looking at it but if it's not atleast 63-65 lbs of pressure to the spider injection setup then the nozzle tips will not open. The fuel pump may be coming on but the o-rings inside the pump go bad over time and quit putting enough pressure to run the engine.
Just for the record, thats the throttle body.
Have you checked to see if the injector is opening ?
If it is a vortec engine, is fuel pressure at least 65psi ?
SOURCE: my 99 gmc sonoma wil start and drive fine untill i
if no codes yet check and clean egr valve ,pcv valve,air filter and/ fuel pump and pressure regulator may b dropping under load
SOURCE: my 99 windstar ran out
To start with, stop using the spray because this is not good for a fuel injected vehicle and you can cause damage to the valves if you continue to do so. Carbs were different in the old days. OK, you may have just caused the fuel pump to try and work a little harder due to being out of gas. There is a fuel cut off switch that will "pop" if you are in an accident or there is an electrical overload. that switch is located in the cargo area od the vehicle. below is a picture of its location for you and the button is on top. Just push it in. If it is "pooped" you will be able to tell for sure when you push it in. Also you may want to check the fuse for the fuel pump motor itself. that fuse is located in the fuse panel under the hood of the vehicle in the engine compartment. The fuse is located in the number 5 position and should be a 15 amp fuse (diagram of fuse layout below). And last is to check the fuel pump relay as well. the relay is located in that same fuse panel and is in the number 207 position. You can check if it is engaging by putting your finger on it and having someone tur the key just to the "on"position (no need to turn the vehicle over as it will engage for 3 - 5 seconds when the key is turned on). You will feel it "click" if it does with your finger. One other thing is if any of these are the problem, you should first prime the fuel system before trying to start the vehicle. this is done by again turning the vehicle key to the "on" position only, wait for 3 - 5 seconds then to the off positiom, turn the key back to the "on" position agian for the same amount of time. Do this several times so the fuel system will build back pressure before trying to start the vehicle. OK, I'm done. I hope this helps and you get going again. Good luck.
SOURCE: 99 GMC sonoma will start with starting fluid then
Will the engine start on its own after the engine is warmed up?
Let me know.
Regards,
SOURCE: 99 GMC sonoma will start with starting fluid then
The 99 GMC, when it acts up, check whether it has fuel and/or spark. It could be related to fuel pressure, available electrical power, ignition component/s.
SOURCE: I have a 99 gmc sierra with 5.3 it takes about 7 seconds to start
Needs a valve adjustment. I assume its EFI, eliminating the possibility of the carb.
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