Hard start rough idle

Discussion in 'V8 - Maintenance & Troubleshooting' started by patrick hubbard, Jul 30, 2019.

  1. patrick hubbard

    patrick hubbard Member

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    Some times my car cranks for a long time. As I crank it chugs faster and faster until it finaly starts. It also idles rough when I first start it then it smooths out. I'm thinking my fuel pump is going out
     
  2. E1

    E1 Crash Tested

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    Fuel pump has an anti-backflow valve on it. Valve often goes bad and releases fuel back to tank.

    Try turning the key "on" but don't crank. You should hear the fuel pump run for a few seconds. Do this a couple times. THEN try to start the car.

    This action refills the fuel lines when a anti-backflow valve leaks back to the tank.
     
  3. gamefanatic

    gamefanatic SHO Member

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    SHOdded likes this.
  4. luigisho

    luigisho SHO Member

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    Those 255s might be too much pump. I never went over 190 and usually stuck with the 155s in the Walbro family brand
     
  5. gamefanatic

    gamefanatic SHO Member

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    I am using the stock regulator with no issues. No doubt overkill for the stock setup.
     

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