# Frustrated

**URL:** <https://community.cartalk.com/t/frustrated/21515>\
**Category:** Maintenance/Repairs\
**Created:** [November 1, 2008, 7:55pm UTC](https://community.cartalk.com/t/frustrated/21515 "2008-11-01T19:55:55Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Amaninesta](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/amaninesta/32/995_2.png) [@Amaninesta](https://community.cartalk.com/u/Amaninesta)\
**Post date:** [November 1, 2008, 7:55pm UTC](https://community.cartalk.com/t/frustrated/21515/1 "2008-11-01T19:55:55Z")

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I have a 1987 GMC Sierra Classic. It is sputtering, chugging, and stalling. I replaced the spark plugs and wires, distributor cap and rotor, and the fuel filter. It is still doing it. People have suggested a bad fuel injector, bad fuel pump, or even a clogged exhaust system (bad catalytic converter or muffler). I am running out of patience and money. Can anyone out there help?

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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:** [November 1, 2008, 8:14pm UTC](https://community.cartalk.com/t/frustrated/21515/2 "2008-11-01T20:14:25Z")

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What size engine in this thing?

Tester

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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:** [November 1, 2008, 8:35pm UTC](https://community.cartalk.com/t/frustrated/21515/3 "2008-11-01T20:35:18Z")

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Also check the EGR valve. If it’s stuck open, it will produce those symptoms. So will a bad ignition module (inside the distributer) Pull gently on the wires to be sure they are sound.

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**Author:** ![TwinTurbo](https://avatars.discourse-cdn.com/v4/letter/t/8baadc/32.png) [@TwinTurbo](https://community.cartalk.com/u/TwinTurbo)\
**Post date:** [November 1, 2008, 11:03pm UTC](https://community.cartalk.com/t/frustrated/21515/4 "2008-11-01T23:03:15Z")

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State the engine size.

Does it do this when the engine is cold too? Or does it gradually get bad as the engine warms up?

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**Author:** ![shadetree51](https://avatars.discourse-cdn.com/v4/letter/s/dfb087/32.png) [@shadetree51](https://community.cartalk.com/u/shadetree51)\
**Post date:** [November 2, 2008, 6:25pm UTC](https://community.cartalk.com/t/frustrated/21515/5 "2008-11-02T18:25:04Z")

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Not wenough information but if the vechicle not driven often consider adding seafoam to gas tank as it may be just gummed up. write more about how many mniles etc.