-1992 Chevy 5.7V8 Throttle Body Injection
-Fuel pump is new and holds pressure.
-Van dies during idles and low speeds and is hard to get started.
-Dies at random times, sometimes after a few seconds, sometimes after minutes of idling.
-Dies quickly, not sputter or anything like that.
-Runs fine when moving at a speed >20mph.
2006-11-15 05:21:17 · 5 answers · asked by Jonathan 2 in Cars & Transportation ➔ Maintenance & Repairs
Remove the gas line attaching to the carburetor, put the open end into a gas proof container. Have someone spin the engine and watch the flow of gasoline from the fuel pump. Is there a good flow? It is always best to check the pump pressure while you are at it.
If you have good flow and pressure, the fuel pump is probably ok.
There may be a fuel filter screwed in where you unscrewed the gas line. If so, this could be stopped up.
IF you DON'T have a good fuel flow, change out the main fuel filter. It may be stopped up. Check the entire fuel line from the pump to the carburetor and maker sure it isn't twisted or gotten mashed together from something hitting it.
I am sure the pump has a relay. The ignition switch wouldn't be able to carry the amperage used by the pump.
Some pump system us a pressure relief valve to allow the gas to bypass the carburetor if the pressure is too high. It may have a pressure cutoff switch. The switch will cut the pump off when the pressure get too high.
You will have to start checking at the pump and proceed to check all the way to the carburetor. I am pretty sure the "carburetor" is actually an injection body on your truck. Good luck. Pops
2006-11-15 05:33:00 · answer #1 · answered by Pops 6 · 0⤊ 1⤋
If the problem was a fuel pump relay, the current to the relay wouldn't be affected by speed. It sounds more like a fuel delivery concern: Is an error code set? If so, have that checked (free) at any AutoZone. Run a couple cans of injector cleaner. Could also be any one of a number of sensors that affect fuel delivery: TPS, O2, engine speed sensor, MAP sensor, ping sensor, etc., although those problems should trap an error code. Good luck!
2006-11-15 13:30:27 · answer #2 · answered by davidosterberg1 6 · 0⤊ 1⤋
Yes there is a relay. You may be having other problems though. There are many sensors in your system that will shut down the engine. Have the car properly diagnosed before you spend a fortune on unneccesary parts.
2006-11-15 13:25:27 · answer #3 · answered by yes_its_me 7 · 0⤊ 0⤋
yes there is a relay, but it doesnt sound like a relay problem. sounds like a fuel delivery problem maybe the fuel rails. relay is in engine compartment in a power distsribution box
2006-11-15 13:26:02 · answer #4 · answered by bela k 4 · 0⤊ 0⤋
had this problem and cleared it up by simply changing the fuel filter which was clogged
2006-11-15 13:31:10 · answer #5 · answered by michael m 6 · 0⤊ 1⤋