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Rough idle

Tiny
BAMBAM187
  • MEMBER
  • 2003 OLDSMOBILE BRAVADA
  • 6 CYL
  • AWD
  • AUTOMATIC
  • 200,000 MILES
Well, I changed the plugs now it has a rough idle. I do not know what to do. I have tried to reset the system it is not working. I have checked all the plugs make sure everything was connected right, it still runs rough.
Sunday, March 12th, 2017 AT 7:02 AM

3 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Sometimes new plugs do that. Drive it for a few miles see if it straightens out. Then check your plug wires and for a vacuum leak.
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Sunday, March 12th, 2017 AT 8:35 AM
Tiny
BAMBAM187
  • MEMBER
  • 2 POSTS
I have done that drove it sixty miles no change.
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Sunday, March 12th, 2017 AT 9:32 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Okay, check for a vacuum leak and check fuel pressure with a gauge auto parts rent that. should be 60-66 psi with lower number minimum also should hold with in 10 psi for five minutes at least.
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
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Sunday, March 12th, 2017 AT 9:47 AM

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