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Forum: C4 Technical Issues

Any and all problems involving your C4, including ZR1 and LT4. INCLUDE THE YEAR OF YOUR CAR.

  1. Sticky Thread Sticky: OPTISPARK DIAGNOSTICS, or is it something else ?

    Started by c4c5specialist, 12-20-2011 10:25 AM
    2 Pages
    1 2
    • Replies: 19
    • Views: 30,009
    09-13-2019, 01:08 PM Go to last post
  1. Question C4 air blend door

    Started by russellsue, Today 02:31 PM
    • Replies: 0
    • Views: 5
    Today, 02:31 PM Go to last post
  2. Good mechanic

    Started by rhandle, 06-16-2020 01:39 AM
    • Replies: 5
    • Views: 242
    06-17-2020, 07:35 AM Go to last post
  3. 87 Corvette Code 42

    Started by jsm00z28ss, 05-29-2020 09:19 PM
    • Replies: 2
    • Views: 216
    05-30-2020, 09:13 PM Go to last post
  4. Replacing oil pressure switch?

    Started by Blu88, 05-07-2020 01:19 PM
    • Replies: 6
    • Views: 668
    05-20-2020, 02:42 AM Go to last post
  5. 89 Vette steering rack.

    Started by ken mohr, 02-16-2020 07:49 AM
    • Replies: 2
    • Views: 2,292
    02-20-2020, 04:37 AM Go to last post
  6. transmision problems

    Started by winston, 04-23-2019 08:13 PM
    • Replies: 3
    • Views: 1,906
    07-31-2019, 02:10 PM Go to last post
  7. Unhappy fuel problem

    Started by vanzantdoug, 07-27-2018 01:06 PM
    • Replies: 2
    • Views: 1,824
    07-31-2019, 02:05 PM Go to last post
  8. Starter

    Started by Roc, 07-20-2019 10:08 AM
    • Replies: 1
    • Views: 800
    07-21-2019, 06:42 AM Go to last post
  9. Bore size for rebuild on master cylinder

    Started by ken mohr, 03-15-2019 12:03 PM
    • Replies: 2
    • Views: 1,583
    03-17-2019, 04:10 AM Go to last post
  10. Air conditioning problems

    Started by Sfcsb1, 06-04-2014 05:31 PM
    • Replies: 13
    • Views: 12,321
    01-17-2019, 03:54 PM Go to last post
  11. 94 6 speed low idle

    Started by Tbone, 10-17-2018 01:53 PM
    • Replies: 0
    • Views: 1,332
    10-17-2018, 01:53 PM Go to last post
  12. C4 Died

    Started by Tbone, 06-07-2018 09:06 AM
    • Replies: 1
    • Views: 1,520
    06-08-2018, 12:25 PM Go to last post
    • Replies: 5
    • Views: 2,818
    02-04-2018, 12:08 PM Go to last post
  13. Question C5 wheels & tires on a 87 c4 coupe

    Started by HUEY, 02-03-2018 06:06 PM
    • Replies: 0
    • Views: 1,701
    02-03-2018, 06:06 PM Go to last post
  14. Wink Battery suppliers

    Started by Chester, 12-15-2017 05:16 PM
    • Replies: 6
    • Views: 2,782
    01-06-2018, 07:33 AM Go to last post
  15. Question C4 opti numbers

    Started by Chester, 12-07-2017 06:38 AM
    • Replies: 3
    • Views: 2,173
    01-01-2018, 06:30 PM Go to last post
  16. four post lift installers

    Started by Chester, 12-31-2017 08:52 AM
    • Replies: 0
    • Views: 1,305
    12-31-2017, 08:52 AM Go to last post
  17. Lift to work on c3&C4

    Started by Chester, 12-02-2017 04:47 PM
    • Replies: 9
    • Views: 3,267
    12-30-2017, 01:09 AM Go to last post
  18. Question exhaust manifold paint

    Started by Chester, 12-02-2017 04:34 PM
    • Replies: 4
    • Views: 2,175
    12-30-2017, 01:06 AM Go to last post
  19. Question No Flex C4

    Started by Chester, 12-26-2017 06:37 AM
    • Replies: 0
    • Views: 3,390
    12-26-2017, 06:37 AM Go to last post

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