# 1997 Chevrolet Pickup Bad Idle and Vibrations

**URL:** <https://community.cartalk.com/t/1997-chevrolet-pickup-bad-idle-and-vibrations/13576>\
**Category:** Maintenance/Repairs\
**Created:** [May 3, 2008, 3:54pm UTC](https://community.cartalk.com/t/1997-chevrolet-pickup-bad-idle-and-vibrations/13576 "2008-05-03T15:54:02Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![rgustavw](https://avatars.discourse-cdn.com/v4/letter/r/a8b319/32.png) [@rgustavw](https://community.cartalk.com/u/rgustavw)\
**Post date:** [May 3, 2008, 3:54pm UTC](https://community.cartalk.com/t/1997-chevrolet-pickup-bad-idle-and-vibrations/13576/1 "2008-05-03T15:54:02Z")

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My 1/2 ton pickup is making abnormal sounds while running, idle and on the road. It has 197K, so it is rather worn. The sound is like a constant huh huh huh huh huh huh huh. It was a little chilly this morning, and I was able to see the fumes, not smoke, from the tail pipe. I can obviously see that it is not a constant thing…it puffs out. huh huh huh huh huh huh huh huh huh huh

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**Author:** ![Roadrunner](https://avatars.discourse-cdn.com/v4/letter/r/d2c977/32.png) [@Roadrunner](https://community.cartalk.com/u/Roadrunner)\
**Post date:** [May 3, 2008, 7:27pm UTC](https://community.cartalk.com/t/1997-chevrolet-pickup-bad-idle-and-vibrations/13576/2 "2008-05-03T19:27:04Z")

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Any misfiring? The puffing noise you mention reminds me of an open spark plug hole.

Yes, I know you said you didn’t see any smoke from the tailpipe.

Lets see what the others have to suggest.

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**Author:** ![rgustavw](https://avatars.discourse-cdn.com/v4/letter/r/a8b319/32.png) [@rgustavw](https://community.cartalk.com/u/rgustavw)\
**Post date:** [May 3, 2008, 9:32pm UTC](https://community.cartalk.com/t/1997-chevrolet-pickup-bad-idle-and-vibrations/13576/3 "2008-05-03T21:32:29Z")

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Well, I just had a mechanic tell me today that the injectors are ruined and need replacing. Also, the O2 sensor is bad. Does this sound correct?

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**Author:** ![Roadrunner](https://avatars.discourse-cdn.com/v4/letter/r/d2c977/32.png) [@Roadrunner](https://community.cartalk.com/u/Roadrunner)\
**Post date:** [May 4, 2008, 1:30am UTC](https://community.cartalk.com/t/1997-chevrolet-pickup-bad-idle-and-vibrations/13576/4 "2008-05-04T01:30:21Z")

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If the O2 sensor was ‘bad’, you would have had a SEL or CEL. If so, find out the code number and post it here please.

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**Author:** ![maico\_490](https://avatars.discourse-cdn.com/v4/letter/m/9dc877/32.png) [@maico\_490](https://community.cartalk.com/u/maico_490)\
**Post date:** [May 4, 2008, 1:54am UTC](https://community.cartalk.com/t/1997-chevrolet-pickup-bad-idle-and-vibrations/13576/5 "2008-05-04T01:54:18Z")

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what fuel sys, do you have ? TBI,CMFI,MFI?

maico