# 1993 Mazda B2600 - Runs rough

**URL:** <https://community.cartalk.com/t/1993-mazda-b2600-runs-rough/143627>\
**Category:** Maintenance/Repairs\
**Tags:** mazda\
**Created:** [July 4, 2019, 8:35am UTC](https://community.cartalk.com/t/1993-mazda-b2600-runs-rough/143627 "2019-07-04T08:35:13Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![SeanRobertson](https://avatars.discourse-cdn.com/v4/letter/s/3ab097/32.png) [@SeanRobertson](https://community.cartalk.com/u/SeanRobertson)\
**Post date:** [July 4, 2019, 8:35am UTC](https://community.cartalk.com/t/1993-mazda-b2600-runs-rough/143627/1 "2019-07-04T08:35:13Z")

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I have a 93 mazda B2600i. It start to run rough and run very rich… when I go to start it dies after a couple seconds. On the second attempt it will stay running… where do I start??

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**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\
**Post date:** [July 4, 2019, 2:17pm UTC](https://community.cartalk.com/t/1993-mazda-b2600-runs-rough/143627/2 "2019-07-04T14:17:54Z")

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Start with the check engine light. Is it on? Can you pull the error codes from this (google how, this is an OBD 1 vehicle)

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**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\
**Post date:** [July 4, 2019, 3:09pm UTC](https://community.cartalk.com/t/1993-mazda-b2600-runs-rough/143627/3 "2019-07-04T15:09:01Z")

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Check for worn timing chain(s).

[https://www.rockauto.com/en/moreinfo.php?pk=4804308&cc=1190663&jsn=405](https://www.rockauto.com/en/moreinfo.php?pk=4804308&cc=1190663&jsn=405)

To do this, remove the distributor cap.

Take a socket/ breaker bar and get on the crankshaft bolt.

Turn the engine by hand in the normal direction while watching the rotor in the distributor.

Now turn the engine by hand in the opposite direction while watching the rotor in the distributor.

If the engine can be turned in the opposite direction more than 5 degrees before the rotor in the distributor begins to rotate, it indicates the timing chain(s) are stretched and require replacement.

Tester