What kind of fuel pump did a 1990 Chevy have?
1990 chevy k1500 truck (5.0). Power at orange wire of fuel pump relay but pump won’t run. No power to any of the other 1990 chevy: Power at orange wire of fuel pump relay but pump wont run… Got no power to the fuel pump relay. Consistent. 1990 Chevy I replaced the relay. Not getting fuel I have 8 volts at the fuel pump plug … read more
Why does my fuel pump not start when I change it?
You always want to replace the fuel filter when replacing the fuel pump. This could cause the concern you are having. It may seem as you are getting enough fuel from the pressure regulator but if the pressure from the fuel tank is not correct, it will still not start. Another problem you could be having is spark.
Why does my GM 91 k1500 not start?
If it runs when he pours gas down the throttle body the ignition is fine. It is fuel related. You need three things to make an engine run. Spark, fuel, and compression. Every no start I did at the GM dealer i would take my can of carb cleaner and spray it in the throttle body and try to start the engine.
What should the PSI be on the fuel pump?
With the engine off and key on, there should be 45 to 60 PSI on the gauge. If there is nothing on the gauge, then check your connection to the shrader valve. You may need to remove the shrader part of the valve from the threaded tube. If there is still no pressure, then replace the fuel filter and retest.
What to do if your fuel pump is not working?
If nothing after that, then the fuel pressure regulator is not working and needs replacing. If you get pressure to the rail, then there could be a problem with the injectors; they may be either dirty or plugged up. Take the injectors off the engine and clean them with CLR.
With the engine off and key on, there should be 45 to 60 PSI on the gauge. If there is nothing on the gauge, then check your connection to the shrader valve. You may need to remove the shrader part of the valve from the threaded tube. If there is still no pressure, then replace the fuel filter and retest.
What causes low pressure in a fuel pump?
A voltage drop is often due to a bad battery or improperly-installed wires. If the fuel lines are cracked or clogged, the fuel pressure will drop before it reaches the engine. This in turn causes the engine to deliver a poor performance. The fuel pressure regulator, as the name signifies, regulates the pressure of fuel delivered to the engine.
Do you have to fill the gas tank when installing a new fuel pump?
Having the gas tank at least half-filled is important when you are installing a new fuel pump. Checking these issues is a great way to ensure that the problem is being properly addressed.