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  1. #1
    Member Corvette-Pilot's Avatar
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    Default Opti Spark Repair Article

    Thought this might be of interest if your Optispark goes bad.
    http://www.corvettefever.com/editori...=text&id=16758

    This may have been posted before but just in case
    1994 Black Rose Coupe
    56,000 miles, 3rd Owner, No Known Mods YET

  2. #2
    Steve92LT1
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    That is a really interesting idea, and looks like it would work pretty good. It basically gives the pre-1995 opti the benefits of the later model. To change to the later opti, you have to change the timing cover and etc... This way you don't.. Cool idea..

  3. #3
    Member RLD92's Avatar
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    I used this article to change my 92 opti to the vented version it works well 1 1/2 yrs now. Instead of modifying my new opti I purchased a 95/96 cap kit and used it they are interchangable.

  4. #4
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    Looks like they removed that article from the website.
    I get file 404, not found crap!
    Tom,
    1996 LT1, Convertible, automatic, Corsa Exhaust,JBA headers, 3:45's ,Purple Metallic w/light biege top & interior.

    2006 Z51 M6 Daytona Sunset Coupe.

  5. #5
    ramrod
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    Default Opti

    Did the article basically suggest installing a 95+ Cap & Rotor ?

    I had to replace the Opti on my 94 Buick Roadmaster and it was definately NO fun ...

  6. #6
    Member dburgjohn's Avatar
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    Default Opti-Spark

    There is a good how-to on this site

    http://corvetteactioncenter.com/tech/c4/optispark.html

  7. #7
    "94 Sixspeed
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    Default Question

    I read the article, and it sounds like a good cleaning will correct many of the failures.. But there is a lot of labor to remove and replace the unit... Is there a way to go back to a normal distributor and ditch this failure prone unit?? Is it posible to mate the existing computer setup to another distributer? Is this a bad idea??

  8. #8
    VetteRon
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    Default Optispark troubles

    I had a leaking waterpump take out my optispark on my 93'. I replaced the distributor, coil, module, plug wires & waterpump. It fired right up & ran great for about an hour & an half. Then it started missing & dying. After 3 restarts that was it. There are no codes present. There is spark from the coil but nothing out of the distributor. I also installed a moisture eliminator kit from Mid America. Any ideas as to what maybe the problem. It looks like the optispark died again to me, but why?

  9. #9
    Member Corvette-Pilot's Avatar
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    Default

    I have to assume you replaced the water pump while in there?

    Also need to mention the article I mentioned in the start of this thread is no longer active.

  10. #10
    Member Robertwav1's Avatar
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    Default Article website....

    http://www.corvettefever.com/howto/16758/

    Opti spark Options are listed here...!

  11. #11
    Member bogus's Avatar
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    The opti is one topic that has been beaten to death everywhere in the C4 world!!!

    It is a POS. Lets agree to that.

    now... converting to the late model is an improvement, but a company, DynoTech Engineering, that has built a new and improved optispark.

    Check out the details.

    www.dynotech-eng.com

    The problem with the early opti's is bearing failure. cleaning will help, some, but not enough. They are water sensative, but not fatally so. What kills them is antifreeze!!!! that will eat the bearings up in a heartbeat!! well... not THAT quick, but pretty fast.

    Also, run a bead of RTV around the edge where the cap and the opti body meet.

    Important - later caps will NOT fit on earlier opti's.

    What DTE did was take a 2nd gen opti, improve it, then apply the changes to a design that will fit 1st gen opti's.

    The concensus is to not use the Mid-America opti vent. It is only 1 way. The GM unit, about $10.00, is cheaper and better. It creates a pressurized air flow.

    I hope this clears up some of the misconceptions of the opti...

  12. #12
    VetteRon
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    Yes I replaced the water pump & hoses. I read somewhere that a few people have found the rotor mounting screw has fallen out & allows the rotor to slip. Would explain my situation. I guess tomorrow I'll pull it out again & see if thats the case.

  13. #13
    VetteRon
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    Thanks for the info. I will check into the dealer moisture eliminator kit, since I'm going to have the distributor out again. Would you know the part # of the kit ? Thanks again!

  14. #14
    Member bogus's Avatar
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    Default

    Originally posted by VetteRon
    Thanks for the info. I will check into the dealer moisture eliminator kit, since I'm going to have the distributor out again. Would you know the part # of the kit ? Thanks again!
    12556174

    When I got it, the list was about $13.00.

    You will have to modify the cap and body to accept the hoses. The article listed elsewhere, has the details.

  15. #15
    Member Corvette-Pilot's Avatar
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    Default Re: Article website....

    Originally posted by Robertwav1
    http://www.corvettefever.com/howto/16758/

    Opti spark Options are listed here...!
    Ya, that's the article !

    Thanks for finding it !!
    Looks like they just rearranged their site on me.

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