Question about 1998 Chevrolet S-10 Pickup

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What should the fuel pressure be on main line on chevy s10 2.2

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  • Brian Johnson Dec 07, 2012

    should be mounted on the side of the tank or on the evap canister

  • Brian Johnson Dec 07, 2012

    ahhh you have the modular assembly yes the little 3 wire sensor that has a purple or green sticker on the center and looks like a a little square

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  • 141 Answers

TBI 15 psi port injection 35-45 psi

Posted on Dec 07, 2012

  • 8 more comments 
  • jcattan
    jcattan Dec 07, 2012

    I got 43 psi but truck still random misfires 0300. I have new plugs, coil packs, checked ingition control module, crank sensor I get 0452 code. I removed pump, resealed seal with some vaseline, bought new cap. no change. Help

  • Brian Johnson Dec 07, 2012

    whats the definition on the 452?

  • jcattan
    jcattan Dec 07, 2012

    evaporative sensor, basically fuel tank pressure sensor

  • jcattan
    jcattan Dec 07, 2012

    sensor is in the fuel pump

  • Brian Johnson Dec 07, 2012

    whoa that 452 tank pressure is too low that is not for the fuel pressure that is for the evaporative emissions system it does a self test to determine if you are venting raw hydrocarbons in the atmosphere that is so misleading to someone not familiar with the terminology

  • Brian Johnson Dec 07, 2012

    lets go back to the 300 we will deal with that later

  • Brian Johnson Dec 07, 2012

    the only way a 452 can cause a performance problem is the purge valve is stuck open and you are pulling raw fuel into the engine via the evap line on the manifold plug it off and see if it goes away

  • Brian Johnson Dec 07, 2012

    the 300 that is

  • jcattan
    jcattan Dec 07, 2012

    there are 3 connections at the fuel pump. Is that the center line?

  • jcattan
    jcattan Dec 07, 2012

    I will check connections at fuel pump and evap canister tommorow

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