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93 firebird still quitting help

This is a discussion on 93 firebird still quitting help within the LT1 forums, part of the Vehicle Specific category; my 93 firebird. LT1, auto stock, keeps quitting after about 10 min, fuel pressure is fine 40 to 45, losing ...

  1. #1
    Junior Member
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    93 firebird, LT1, auto

    Unhappy 93 firebird still quitting help

    my 93 firebird. LT1, auto stock, keeps quitting after about 10 min, fuel pressure is fine 40 to 45, losing fire coming out of coil, have replaced coil and icm, no help. Let it set for 10 min it will crank n run but not for long, same thing no fire coming out of coil. what can i check next help im lost.

  2. #2
    Spaz is My Mentor SMWS6TA's Avatar
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    98 T/A w/a little mods...

    I'm telling you opti does this.

    My friend that still has his opti said his did the same crap. One yr he replaced it 4 times. He is currently in the middle of swapping over to a LS1.

  3. #3
    Former Mopar Man 2002ssslp's Avatar
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    It's the opti
    My ride is a 2002 Camaro SS SLP #3296 with 30k, LTH, 3" Y, CME, Frost tune, K&N, ported TB, Blackwing lid, Bellows, MSD, Denso Iridium, and 85mm MAF, Bilsteins, Eibach springs, SLP strut brace, Adj. Panhard, TA Girdle, UMI, Pro 5.0, Nitto NT555
    My wife has a 2004 GTO with the rare SAP, 18" wheels, K&N Cold Air System, MSD, Ported TB, Frost tune, Denso Iridium, Flowmaster cat-back, 3200 Yank, 75k

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    Senior Member 5.0THIS's Avatar
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    Quote Originally Posted by SMWS6TA View Post
    I'm telling you opti does this.

    My friend that still has his opti said his did the same crap. One yr he replaced it 4 times. He is currently in the middle of swapping over to a LS1.
    He was doing it wrong then. It isn't a great design, but they don't break that often. Either the install was fucked up, or something else was wrong causing the opti to fail.

    As far as the OP, it is likely the opti. The opti failing doesn't always manifest itself as a misfire.

  5. #5
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    93 firebird, LT1, auto

    lots of opti s out there any recommendations?

  6. #6
    Spaz is My Mentor SMWS6TA's Avatar
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    Quote Originally Posted by 5.0THIS View Post
    He was doing it wrong then. It isn't a great design, but they don't break that often. Either the install was fucked up, or something else was wrong causing the opti to fail.

    As far as the OP, it is likely the opti. The opti failing doesn't always manifest itself as a misfire.

    We get a lot of rain here, (in fact the most in the nation) so after every time it rained it would start acting up. Got to the point if it rained he would look for a ride to work.

  7. #7
    Senior Member 5.0THIS's Avatar
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    95 Z28

    Quote Originally Posted by SMWS6TA View Post
    We get a lot of rain here, (in fact the most in the nation) so after every time it rained it would start acting up. Got to the point if it rained he would look for a ride to work.


    They're not that finicky. Something else was wrong.


    As for the replacement... you'll find good and bad opinions on every single one of them out there. A factory delco unit is a good bet. Do a google search on "best opti replacement" and there's probably a good couple hours of reading for you to do if you really want to. You will of course want to convert to a vented opti, as they're much more resistant to moisture. And whatever unit you go with, take the cap off and Loctite the rotor screws.

  8. #8
    Senior Member bigrondownhiller's Avatar
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    1996 Camaro Z28 vert

    Go with the ac delco one. If it is original then the car got 20 years out of it. Definetly upgrade to the vented one.

  9. #9
    Junior Member Black beauty's Avatar
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    1995 trans am

    it's the opti

    I just got done with it it's the opti

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