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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: 18
    • Views: 23,137
    07-28-2016, 03:58 AM Go to last post
  1. 94 6 speed low idle

    Started by Tbone, 10-17-2018 01:53 PM
    • Replies: 0
    • Views: 154
    10-17-2018, 01:53 PM Go to last post
  2. Unhappy fuel problem

    Started by vanzantdoug, 07-27-2018 01:06 PM
    • Replies: 0
    • Views: 455
    07-27-2018, 01:06 PM Go to last post
  3. C4 Died

    Started by Tbone, 06-07-2018 09:06 AM
    • Replies: 1
    • Views: 439
    06-08-2018, 12:25 PM Go to last post
    • Replies: 5
    • Views: 1,343
    02-04-2018, 12:08 PM Go to last post
  4. Question C5 wheels & tires on a 87 c4 coupe

    Started by HUEY, 02-03-2018 06:06 PM
    • Replies: 0
    • Views: 732
    02-03-2018, 06:06 PM Go to last post
  5. Wink Battery suppliers

    Started by Chester, 12-15-2017 05:16 PM
    • Replies: 6
    • Views: 1,325
    01-06-2018, 07:33 AM Go to last post
  6. Question C4 opti numbers

    Started by Chester, 12-07-2017 06:38 AM
    • Replies: 3
    • Views: 1,028
    01-01-2018, 06:30 PM Go to last post
  7. four post lift installers

    Started by Chester, 12-31-2017 08:52 AM
    • Replies: 0
    • Views: 485
    12-31-2017, 08:52 AM Go to last post
  8. Lift to work on c3&C4

    Started by Chester, 12-02-2017 04:47 PM
    • Replies: 9
    • Views: 1,732
    12-30-2017, 01:09 AM Go to last post
  9. Question exhaust manifold paint

    Started by Chester, 12-02-2017 04:34 PM
    • Replies: 4
    • Views: 1,048
    12-30-2017, 01:06 AM Go to last post
  10. holliday wishes

    Started by ken mohr, 12-25-2017 04:51 AM
    • Replies: 0
    • Views: 406
    12-25-2017, 04:51 AM Go to last post
  11. Msds

    Started by Chester, 12-18-2017 06:09 AM
    • Replies: 0
    • Views: 502
    12-18-2017, 06:09 AM Go to last post
  12. Wipers from Hell and a loss of Cruise?

    Started by ChuckG, 06-23-2014 08:31 PM
    • Replies: 9
    • Views: 2,794
    12-12-2017, 03:15 PM Go to last post
  13. wtb kwik lift

    Started by Chester, 12-12-2017 06:02 AM
    • Replies: 0
    • Views: 460
    12-12-2017, 06:02 AM Go to last post
  14. Balancer c4 removal

    Started by Chester, 10-08-2017 05:18 PM
    • Replies: 1
    • Views: 885
    12-07-2017, 06:46 AM Go to last post
  15. leather refinish

    Started by ken mohr, 09-05-2016 03:40 AM
    • Replies: 6
    • Views: 1,973
    12-04-2017, 04:44 AM Go to last post
  16. low coolant

    Started by ken mohr, 09-19-2017 03:42 AM
    2 Pages
    1 2
    • Replies: 21
    • Views: 2,995
    11-14-2017, 05:27 AM Go to last post
  17. Need new opti C4

    Started by Chester, 10-20-2017 05:44 AM
    • Replies: 7
    • Views: 1,029
    10-25-2017, 09:40 AM Go to last post
  18. Dealers opti

    Started by Chester, 10-21-2017 03:50 PM
    • Replies: 0
    • Views: 547
    10-21-2017, 03:50 PM Go to last post
  19. Thumbs up Burping my baby

    Started by Chester, 10-16-2017 05:02 AM
    • Replies: 0
    • Views: 552
    10-16-2017, 05:02 AM Go to last post

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