# Mysterious Malady

**URL:** <https://community.cartalk.com/t/mysterious-malady/86291>\
**Category:** Maintenance/Repairs\
**Created:** [July 30, 2014, 12:11am UTC](https://community.cartalk.com/t/mysterious-malady/86291 "2014-07-30T00:11:21Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![Mr\_Magic](https://avatars.discourse-cdn.com/v4/letter/m/fbc32d/32.png) [@Mr\_Magic](https://community.cartalk.com/u/Mr_Magic)\
**Post date:** [July 30, 2014, 12:11am UTC](https://community.cartalk.com/t/mysterious-malady/86291/1 "2014-07-30T00:11:21Z")

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My friend has a 1993 Chevrolet Corvette. After about 50-60 miles of driving, it mysteriously cuts off. After a rest of 15 -20 minutes it will start again but will cut off again after another 30-40 miles. What is up?

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**Author:** ![edb1961](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/edb1961/32/122_2.png) [@edb1961](https://community.cartalk.com/u/edb1961)\
**Post date:** [July 30, 2014, 12:13am UTC](https://community.cartalk.com/t/mysterious-malady/86291/2 "2014-07-30T00:13:51Z")

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I had a similar problem with a 91 Taurus. It would run for an hour or so then quit, 1/2 hour (or so) later it started right up. It was the fuel pump, the mechanic had to hook a scanner to it and let it run to diagnose it properly.

Ed B.

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**Author:** ![ken\_green](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/ken_green/32/816_2.png) [@ken\_green](https://community.cartalk.com/u/ken_green)\
**Post date:** [July 30, 2014, 12:14am UTC](https://community.cartalk.com/t/mysterious-malady/86291/3 "2014-07-30T00:14:09Z")

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His time is up for the quarters he put in ?

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**Author:** ![ken\_green](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/ken_green/32/816_2.png) [@ken\_green](https://community.cartalk.com/u/ken_green)\
**Post date:** [July 30, 2014, 12:15am UTC](https://community.cartalk.com/t/mysterious-malady/86291/4 "2014-07-30T00:15:37Z")

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I’d start wondering about a temperature sensative ignition module. But how to prove that ? Let’s wait for others to chime in.

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**Author:** ![insightful](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/insightful/32/2732_2.png) [@insightful](https://community.cartalk.com/u/insightful)\
**Post date:** [July 30, 2014, 12:37am UTC](https://community.cartalk.com/t/mysterious-malady/86291/5 "2014-07-30T00:37:31Z")

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Crankshaft position sensor failure.

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**Author:** ![missileman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/missileman/32/1366_2.png) [@missileman](https://community.cartalk.com/u/missileman)\
**Post date:** [July 30, 2014, 4:04am UTC](https://community.cartalk.com/t/mysterious-malady/86291/6 "2014-07-30T04:04:56Z")

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I agree with **ken green.** I think you need to replace your ignition control module and make sure to apply the heat sink gel under the module when you install it.

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**Author:** ![the\_same\_mountainbike](https://avatars.discourse-cdn.com/v4/letter/t/c89c15/32.png) [@the\_same\_mountainbike](https://community.cartalk.com/u/the_same_mountainbike)\
**Post date:** [July 30, 2014, 9:19am UTC](https://community.cartalk.com/t/mysterious-malady/86291/7 "2014-07-30T09:19:31Z")

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It’s running out of gas? It is a Vette, after all…

Seriously, a heat sensitive ignition module is an excellent possibility, as it a CPS.  
The forts thing your friend needs to do is determine whether he’s losing spark of fuel. That’s where the diagnosis needs to begin.