# 86 s10 blazer, looses power at 45-50 mph

**URL:** <https://community.cartalk.com/t/86-s10-blazer-looses-power-at-45-50-mph/13554>\
**Category:** Maintenance/Repairs\
**Created:** [May 2, 2008, 10:34pm UTC](https://community.cartalk.com/t/86-s10-blazer-looses-power-at-45-50-mph/13554 "2008-05-02T22:34:52Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![elbenz9](https://avatars.discourse-cdn.com/v4/letter/e/ac8455/32.png) [@elbenz9](https://community.cartalk.com/u/elbenz9)\
**Post date:** [May 2, 2008, 10:34pm UTC](https://community.cartalk.com/t/86-s10-blazer-looses-power-at-45-50-mph/13554/1 "2008-05-02T22:34:52Z")

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I have an 86 s10 blazer. 2.8 v6. It starts and runs fine cold at low speed. At 45-50 mph it won’t go any faster and will stall when I stop. Will restart in 5-10 minutes, but runs ruff. Here’s the kicker. When stopping after trouble starts, braking becomes very hard, obviously loosing vacuum. Replaced 02 sensor and control module and all standard tune up parts.

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**Author:** ![Rod-Knox](https://avatars.discourse-cdn.com/v4/letter/r/a183cd/32.png) [@Rod-Knox](https://community.cartalk.com/u/Rod-Knox)\
**Post date:** [May 3, 2008, 2:43pm UTC](https://community.cartalk.com/t/86-s10-blazer-looses-power-at-45-50-mph/13554/2 "2008-05-03T14:43:20Z")

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Restricted exhaust is a likely cause.