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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: 23,950
    07-28-2016, 03:58 AM Go to last post
  1. Bore size for rebuild on master cylinder

    Started by ken mohr, 03-15-2019 12:03 PM
    • Replies: 2
    • Views: 206
    03-17-2019, 04:10 AM Go to last post
  2. Air conditioning problems

    Started by Sfcsb1, 06-04-2014 05:31 PM
    • Replies: 13
    • Views: 8,978
    01-17-2019, 03:54 PM Go to last post
  3. 94 6 speed low idle

    Started by Tbone, 10-17-2018 01:53 PM
    • Replies: 0
    • Views: 561
    10-17-2018, 01:53 PM Go to last post
  4. Unhappy fuel problem

    Started by vanzantdoug, 07-27-2018 01:06 PM
    • Replies: 0
    • Views: 673
    07-27-2018, 01:06 PM Go to last post
  5. C4 Died

    Started by Tbone, 06-07-2018 09:06 AM
    • Replies: 1
    • Views: 669
    06-08-2018, 12:25 PM Go to last post
    • Replies: 5
    • Views: 1,677
    02-04-2018, 12:08 PM Go to last post
  6. Question C5 wheels & tires on a 87 c4 coupe

    Started by HUEY, 02-03-2018 06:06 PM
    • Replies: 0
    • Views: 939
    02-03-2018, 06:06 PM Go to last post
  7. Wink Battery suppliers

    Started by Chester, 12-15-2017 05:16 PM
    • Replies: 6
    • Views: 1,636
    01-06-2018, 07:33 AM Go to last post
  8. Question C4 opti numbers

    Started by Chester, 12-07-2017 06:38 AM
    • Replies: 3
    • Views: 1,253
    01-01-2018, 06:30 PM Go to last post
  9. four post lift installers

    Started by Chester, 12-31-2017 08:52 AM
    • Replies: 0
    • Views: 653
    12-31-2017, 08:52 AM Go to last post
  10. Lift to work on c3&C4

    Started by Chester, 12-02-2017 04:47 PM
    • Replies: 9
    • Views: 2,100
    12-30-2017, 01:09 AM Go to last post
  11. Question exhaust manifold paint

    Started by Chester, 12-02-2017 04:34 PM
    • Replies: 4
    • Views: 1,299
    12-30-2017, 01:06 AM Go to last post
  12. holliday wishes

    Started by ken mohr, 12-25-2017 04:51 AM
    • Replies: 0
    • Views: 568
    12-25-2017, 04:51 AM Go to last post
  13. Msds

    Started by Chester, 12-18-2017 06:09 AM
    • Replies: 0
    • Views: 677
    12-18-2017, 06:09 AM Go to last post
  14. Wipers from Hell and a loss of Cruise?

    Started by ChuckG, 06-23-2014 08:31 PM
    • Replies: 9
    • Views: 3,102
    12-12-2017, 03:15 PM Go to last post
  15. wtb kwik lift

    Started by Chester, 12-12-2017 06:02 AM
    • Replies: 0
    • Views: 653
    12-12-2017, 06:02 AM Go to last post
  16. Balancer c4 removal

    Started by Chester, 10-08-2017 05:18 PM
    • Replies: 1
    • Views: 1,124
    12-07-2017, 06:46 AM Go to last post
  17. leather refinish

    Started by ken mohr, 09-05-2016 03:40 AM
    • Replies: 6
    • Views: 2,316
    12-04-2017, 04:44 AM Go to last post
  18. low coolant

    Started by ken mohr, 09-19-2017 03:42 AM
    2 Pages
    1 2
    • Replies: 21
    • Views: 3,650
    11-14-2017, 05:27 AM Go to last post
  19. Need new opti C4

    Started by Chester, 10-20-2017 05:44 AM
    • Replies: 7
    • Views: 1,366
    10-25-2017, 09:40 AM Go to last post

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