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2000 corvette going into safe mode

This is a discussion on 2000 corvette going into safe mode within the General Help forums, part of the LSx Technical Help Section category; My 2000 corvette has 3 inch long tube headers, off road x pipe, and no cats. While driving down the ...

  1. #1
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    2000 CORVETTE

    Angry 2000 corvette going into safe mode

    My 2000 corvette has 3 inch long tube headers, off road x pipe, and no cats. While driving down the road or starting off from a stop light the car will suddenly go into safe mode and not want to run no matter how much gas I give or anything. I have already replaced the plugs, triple checked the gapping, changed the plug wires, air filter, fuel filter, checked the coil packs, did a compression test on all cylinders, replaced the front o2 sensors, checked for any air leaks, cleaned the maf sensor. Can not fix problem. Im getting these codes when I read it out PO174; PO152; PO131; PO132; PO300. Any help would be awesome. Could it possibly be a bad accelerator pedal sensor??? Or a bad ECU needing to be reproggramed from having no Cats on the car??? Car wont even sit in driveway and idle properly. Wants to stall.

  2. #2
    Your friendly policeman FinZ28's Avatar
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    Bright Rally Red
    2001 Chevy Camaro Z28

    Looks like you have a misfire condition going on. Might want to check for a vacuum leak under the hood. I had one awhile back on my Z28 which was caused by a hole in my PCV system pulling unmetered air into the engine. It was loud enough I could hear it. Is your check engine light flashing any?
    2001 Chevy Camaro Z28 A4
    SLP cold air intake/lid, SLP smooth bellow, Pacesetter LT's, ORY, Magnaflow exhaust, BMR STB, adjustable Panhard rod, SFC's, LCA's, 1LE sway bars, cross-drilled rotors

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    Smiles for 9.5 Years cammed goat's Avatar
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    Phantom Black Metallic
    2004 GTO M6

    Was the car tuned after the modifications?

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    2000 CORVETTE

    No the car was not tuned after the modifications. Ran into some money problems afterwards and havent gotten them done yet. Now this started right before I was going to get the tune. Yes my check engine light is on and those codes that I put into the thread is what I got from reading it out with an OBDII. I checked for vacuum leaks once already and found one at the Maf sensor but fixed it and problem still exists.

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    Smiles for 9.5 Years cammed goat's Avatar
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    Phantom Black Metallic
    2004 GTO M6

    Okay. Have you checked the intake tube for any cracks/tears? If you have any tears in the intake bellows, that could be the culprit. Also, how many miles are on the car? Is the throttlebody on your car drive-by-wire?

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    Your friendly policeman FinZ28's Avatar
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    Bright Rally Red
    2001 Chevy Camaro Z28

    I would also check your PCV system out, as well. If there is a crack or hole in it you're pulling in unmetered air, which will cause your car to run lean and misfire.

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    2000 CORVETTE

    It has 77,000 miles on it.

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    Smiles for 9.5 Years cammed goat's Avatar
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    Phantom Black Metallic
    2004 GTO M6

    I'm trying to remember if yours has the drive-by-wire throttlebody. Back when I used to post on a GTO-based forum, years ago, the LS2 GTOs had limp-mode issues that were electronic throttlebody related.

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    Member robs98mysticZ's Avatar
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    Mystic Teal Metallic:320c
    1998 Camaro Z/28

    Quote Originally Posted by cammed goat View Post
    I'm trying to remember if yours has the drive-by-wire throttlebody. Back when I used to post on a GTO-based forum, years ago, the LS2 GTOs had limp-mode issues that were electronic throttlebody related.
    its a 00' so dbw tb not elec.

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    O U 8 1 2 Spaz's Avatar
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    is the maf wire plugged back in??? check all the wires...

  11. #11
    Veteran 0rion's Avatar
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    have you checked for a melted wire on the headers? Also...verify fuel pressure at the rail. 3 out of 5 codes there are O2 codes. If you've replaced the sensors I would then look at the harness. Any exhaust leaks pre O2 sensor?

  12. #12
    Smiles for 9.5 Years cammed goat's Avatar
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    Phantom Black Metallic
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    Quote Originally Posted by robs98mysticZ View Post
    its a 00' so dbw tb not elec.
    That's what I meant. DBW. I've also heard them called electronic as well.

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