Question about 2001 Chevrolet S-10

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What is the range that the fuel lines should have when hooking up a fuel pressure gauge to the fuel lines on a 2001 chevy s-10 ZR 2

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You want to make sure you are hooked up to the pressure line. This is the larger of the two lines. Depending on the engine pressure is in the vicenity of 29-36 psi or can be 9-13 psi. The fuel pump is in the tank and these trucks have wiring issues.
What is your exact problem?

Posted on Jan 15, 2009

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2001 chevy silverado fails to start on random days, 50 psi fuel pressure at test port, a couple of hours later it starts perfectly and does so for a month or so then does it again


need to check fuel pressure before trying to start and see if it's bleeding down or staying pressurized hook gauge on and check periodically before trying to start, seems like mine done that and it was a b ad fuel pressure regulator on the fuel rail, 5.3 ? it's on drivers side rail with vacumn line erunning to it about the size of silver dollar diam.

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1 Answer

How to check fuel pressure


With a fuel pressure gauge. If there is a test port called a schraeder valve on the fuel rail on top of the engine, it's easy. If no test port, you have to tee off the fuel line somewhere convenient (like right after the fuel filter) and hook your gauge up there. Hook the gauge up, make sure of no leaking, turn key to on, and read the pressure (it will read the same pressure in the line as at the fuel rail). Check pressure with key on, and then with engine running- if at the specs for your vehicle, it's good. If pressure is below specs, pinch off or pull off the vacuum line to the fuel pressure regulator, and see if pressure raises. If it does, try another pressure regulator. If no change, check the fuel return line for restrictions, check or replace the fuel filter, or suspect a poor performing fuel pump. On MPFI systems the pressure should be about 50 psi, but find the specs for your vehicle.

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1 Answer

Need to check fuel pressure on a chevy s10 2.2 eng can't find fuel pressure relief port


I don't think those motors have a test port. You'll need to buy or rent and in line fuel pressure gauge that will need to be connected at some joint in the fuel line, usually a connection at the fuel rail or fuel filter.

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1993 GMC Jimmy won't throttle up..changed fuel pump...sounds like fuel is running back into tank


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How do you replace the gas filter on a 1999 chevy venture 3.4 van?


How to Replace a Fuel Filter in a Chevy
I want to do this! What's This?

A clean fuel filter in your Chevy means clean fuel injectors and a clean fuel pressure regulator. Replace the fuel filter in your every 30,000 to 40,000 miles to keep the fuel system in optimal condition. Follow the instructions provided here to change the fuel filter on a Chevy that does not have a flex fuel system.
Difficulty: Moderate Instructions Things You'll Need:

  • Shop towel
  • Pressure gauge
  • Container for fuel
  • Car ramps
  • Wrench
  • New fuel filter
  1. 1 Disconnect the negative battery cable. Relieve the vapor pressure in the fuel tank by slowly loosening the fuel filter cap. Wrap a shop towel around the fuel pressure valve as you connect a pressure gauge to the fuel pressure valve.
  2. 2 Put the bleed hose of the gauge into a container that will hold the fuel. Open the gauge valve to bleed the system pressure. Drain any fuel that remains in the gauge into the container, as well.
  3. 3 Raise the vehicle and clean the fuel filter connections and the surrounding areas. Disconnect the fuel pipes and the threaded fittings from the fuel filter. Cover the fuel pipes once they're disconnected, to prevent contaminating your fuel system.
  4. 4 Slide the fuel filter out of the bracket on the frame rail. Check the fuel pipe O-rings and replace the if you find any cuts, nicks, or distortion. Slide the new filter into the bracket. Remove the caps you put on the fuel pipes and connect the threaded fittings back to the filter. Tighten the fittings to 18 foot-pounds.
  5. 5 Lower the vehicle and tighten the fuel filter cap. Replace the fuel. Reconnect the negative battery cable. Turn the ignition on for 2 seconds. Turn the ignition off for 10 seconds, the Chevy and check for leaks.
Tips & Warnings
  • Always let the pressure out of the fuel system before you disconnect the fuel lines. Do this carefully so as not to spray fuel on your skin, face or eyes.
  • Make sure you wipe up any fuel that may have spilled while you were replacing the filter.

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1 Answer

Truck don't start


When you turn the key to the "run" position, listen and see if you can hear a buzzing noise coming from the under the bed. This is your fuel pump buzzing for 2-3 seconds. If it isnt buzzing, you most likely have a faulty fuel pump. If it does buzz, check the fuel pressure. There is a schrader valve on the fuel line under the hood near the back of the intake manifold. You will need a fuel pressure gauge to check the pressure. If it doesnt build 50-60 psi, it will most likely, again, need a fuel pump.

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1 Answer

Won't start when cold


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