# Tach signal slow / Engine dies after 10 seconds

**URL:** <https://forums.speedlife.net/t/tach-signal-slow-engine-dies-after-10-seconds/101195>\
**Category:** SON240sx Automotive\
**Created:** [October 27, 2006, 1:06pm UTC](https://forums.speedlife.net/t/tach-signal-slow-engine-dies-after-10-seconds/101195 "2006-10-27T13:06:53Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Nissan](https://avatars.discourse-cdn.com/v4/letter/n/e68b1a/32.png) [@Nissan](https://forums.speedlife.net/u/Nissan)\
**Post date:** [October 27, 2006, 1:06pm UTC](https://forums.speedlife.net/t/tach-signal-slow-engine-dies-after-10-seconds/101195/1 "2006-10-27T13:06:53Z")

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ok well i have a dohc engine in a 89 coupe and i got it running today but whn it starts it takes about 3 seconds for the tach to catch up to the engine rpms  
the rpms on the tach slowly go up to 1500 then they stay their for about 5 seconds and slowly start to come back down until the car stalls out

the engine runs ok while the rpms are rising and flalling but i would like to know whats causing the tach to be slow and the engine to die.

this all happens in around 10 seconds

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**Author:** ![roast](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/roast/32/5498_2.png) [@roast](https://forums.speedlife.net/u/roast)\
**Post date:** [October 27, 2006, 1:19pm UTC](https://forums.speedlife.net/t/tach-signal-slow-engine-dies-after-10-seconds/101195/2 "2006-10-27T13:19:35Z")

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Did you put in a DOHC tach?

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<div class="post-metadata">

**Author:** ![Nissan](https://avatars.discourse-cdn.com/v4/letter/n/e68b1a/32.png) [@Nissan](https://forums.speedlife.net/u/Nissan)\
**Post date:** [October 27, 2006, 1:46pm UTC](https://forums.speedlife.net/t/tach-signal-slow-engine-dies-after-10-seconds/101195/3 "2006-10-27T13:46:16Z")

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yes it is a dohc tach