# 99 Blazer motor repair

**URL:** <https://community.cartalk.com/t/99-blazer-motor-repair/38642>\
**Category:** Maintenance/Repairs\
**Tags:** chevrolet, blazer\
**Created:** [October 26, 2009, 4:31pm UTC](https://community.cartalk.com/t/99-blazer-motor-repair/38642 "2009-10-26T16:31:15Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![LoriJay](https://avatars.discourse-cdn.com/v4/letter/l/7ab992/32.png) [@LoriJay](https://community.cartalk.com/u/LoriJay)\
**Post date:** [October 26, 2009, 4:31pm UTC](https://community.cartalk.com/t/99-blazer-motor-repair/38642/1 "2009-10-26T16:31:15Z")

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We replaced the intake gasket, air filter, plugs wires cap, mass air flow sensor and have checked for vacuum leaks engine still bogs down and seems not to want to shift.

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**Author:** ![LoriJay](https://avatars.discourse-cdn.com/v4/letter/l/7ab992/32.png) [@LoriJay](https://community.cartalk.com/u/LoriJay)\
**Post date:** [October 26, 2009, 4:34pm UTC](https://community.cartalk.com/t/99-blazer-motor-repair/38642/2 "2009-10-26T16:34:06Z")

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Pay for registration!!! I don’t think so!!! This sucks!!!

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**Author:** ![Caddyman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/caddyman/32/23_2.png) [@Caddyman](https://community.cartalk.com/u/Caddyman)\
**Post date:** [October 26, 2009, 4:49pm UTC](https://community.cartalk.com/t/99-blazer-motor-repair/38642/3 "2009-10-26T16:49:00Z")

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For years, internet users have been spoiled by being offered free services. It looks like the the free-lunch counter is closing…You are going to have to put a stamp on your e-mails and pay for Google searches…Oh Dear…

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**Author:** ![researcher](https://avatars.discourse-cdn.com/v4/letter/r/edb3f5/32.png) [@researcher](https://community.cartalk.com/u/researcher)\
**Post date:** [October 26, 2009, 5:14pm UTC](https://community.cartalk.com/t/99-blazer-motor-repair/38642/4 "2009-10-26T17:14:15Z")

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Check the operation of the Throttle Position Sensor and its wiring. Use an analog VOM to see that the output voltage is smooth and linear as the throttle is openned.

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**Author:** ![cigroller](https://avatars.discourse-cdn.com/v4/letter/c/c68b51/32.png) [@cigroller](https://community.cartalk.com/u/cigroller)\
**Post date:** [October 26, 2009, 5:17pm UTC](https://community.cartalk.com/t/99-blazer-motor-repair/38642/5 "2009-10-26T17:17:38Z")

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???

What is that about?

Oh right - and the question. You mention spark and air - how about fuel? Anyone check the fuel pressure? How old is the fuel filter?