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    Roggle's Avatar
    Roggle Posts: 15, Reputation: 2
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    #1

    Aug 8, 2012, 07:34 PM
    Fuel pressure for 1990 chevy c1500 with 5.0 v8
    How many psi should this pump be putting out?
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #2

    Aug 9, 2012, 05:10 AM
    40 to 47 psi.
    Roggle's Avatar
    Roggle Posts: 15, Reputation: 2
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    #3

    Aug 9, 2012, 06:38 AM
    Thanks,monkey. Ive replaced fuel relay,filter and pump. Still no go. So ill hook up fuel pressure gauge and go from there.
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #4

    Aug 9, 2012, 06:49 AM
    Is it a crank but won't start situation?
    Roggle's Avatar
    Roggle Posts: 15, Reputation: 2
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    #5

    Aug 9, 2012, 07:06 AM
    Yes. Started as a starter issue. Wouldn't engage every time. Unplugged and replugged starter and that worked. Started truck like 8 times flawlessly to test my work and it stopped firing on the 9th. Changed out the before mentioned parts and no luck. Yet.
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #6

    Aug 9, 2012, 08:06 AM
    Greater than 90% of all crank but won't start situations are electrical-related, not fuel. Here are my thoughts:

    . Replace the Ignition Control Module (ICM).

    . Check/replace the ignition switch for wear, pitting, or melting, if there's any question about the integrity of the switch.

    . The fuel pump is likely fine, if you can hear it run when the ignition switch is turned to ON.
    Roggle's Avatar
    Roggle Posts: 15, Reputation: 2
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    #7

    Aug 9, 2012, 08:29 AM
    Ill try those out. Thanks! Let me know if anything else comes to mind.
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #8

    Aug 9, 2012, 08:35 AM
    The starter motor cranks every time, right, when the ignition switch is turned to Start?
    Roggle's Avatar
    Roggle Posts: 15, Reputation: 2
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    #9

    Aug 9, 2012, 11:03 AM
    Correct. When I turn the key the starter cranks flawlessly.
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #10

    Aug 9, 2012, 11:32 AM
    Good. I think replacing the ICM will solve the problem. Verify, however, that the Check Engine Light comes on and goes off normally, when the ignition switch is turned to ON.
    Roggle's Avatar
    Roggle Posts: 15, Reputation: 2
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    #11

    Aug 9, 2012, 01:19 PM
    I will do that tonight and let you know how it worked tomorrow. Thank you for all your help!
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    Roggle Posts: 15, Reputation: 2
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    #12

    Aug 10, 2012, 06:40 AM
    You were 100% correct! I changed ICM and she fired up immediately! Thanks again for all your time and assistance!
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #13

    Aug 10, 2012, 06:42 AM
    You're welcome. Very good job!
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