# Engine surge/stumble

**URL:** <https://community.cartalk.com/t/engine-surge-stumble/35391>\
**Category:** Maintenance/Repairs\
**Tags:** pontiac, firebird\
**Created:** [August 21, 2009, 8:56pm UTC](https://community.cartalk.com/t/engine-surge-stumble/35391 "2009-08-21T20:56:03Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![bcorwin](https://avatars.discourse-cdn.com/v4/letter/b/3e96dc/32.png) [@bcorwin](https://community.cartalk.com/u/bcorwin)\
**Post date:** [August 21, 2009, 8:56pm UTC](https://community.cartalk.com/t/engine-surge-stumble/35391/1 "2009-08-21T20:56:03Z")

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My '99 Firehawk, with 130K miles, has developed a “stumble”, “flat spot” in the 2k-3k rpm range during moderate acceleration. My plugs and wires were changed at 100K miles, the OBD is not registering any codes. When not under load I cannot hear or feel this, but it is quite noticeable when the engine is under moderate load. Where should I be looking?

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**Author:** ![bennyandthejets](https://avatars.discourse-cdn.com/v4/letter/b/b487fb/32.png) [@bennyandthejets](https://community.cartalk.com/u/bennyandthejets)\
**Post date:** [August 21, 2009, 9:09pm UTC](https://community.cartalk.com/t/engine-surge-stumble/35391/2 "2009-08-21T21:09:10Z")

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Fuel filter? Dist. cap, rotor (if it isn’t DIS), MAF sensor. etc.

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**Author:** ![circuitsmith](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/circuitsmith/32/40376_2.png) [@circuitsmith](https://community.cartalk.com/u/circuitsmith)\
**Post date:** [August 22, 2009, 1:23pm UTC](https://community.cartalk.com/t/engine-surge-stumble/35391/3 "2009-08-22T13:23:07Z")

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A compression test is in order.