V6 Discussion and questions about the base carbureted or MPFI V6's and the rare SFI Turbo V6.

89 firebird 2.8 V6 Rough Idle

Old Jun 18, 2009 | 04:53 PM
  #1  
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89 firebird 2.8 V6 Rough Idle

Car idles good in park or nuetral, when you put it in drive or stopped at a light in stumbles. When car is first started it dosn't seem to have a fast idle or choke, any ideas? would the TPS be causing this? Has an exhaust leak seems like it needs cat back system.
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Old Jun 18, 2009 | 05:07 PM
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Re: 89 firebird 2.8 V6 Rough Idle

Originally Posted by racrx1271
Car idles good in park or nuetral, when you put it in drive or stopped at a light in stumbles. When car is first started it dosn't seem to have a fast idle or choke, any ideas? would the TPS be causing this? Has an exhaust leak seems like it needs cat back system.
check engine light on? i bet it is. what codes are they?
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Old Jun 18, 2009 | 05:20 PM
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Re: 89 firebird 2.8 V6 Rough Idle

Im getting a 13, 23 and 32. I got a new O2 sensor that I'm gonna put in. I wondering if I should put in a new TPS too, or a Mat and it seems like the EGR is working properly. Is there a certain order to do these things?
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Old Jun 18, 2009 | 05:41 PM
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Re: 89 firebird 2.8 V6 Rough Idle

un plug the maf and see if it affects the idle. it should.
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Old Jun 18, 2009 | 07:27 PM
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Re: 89 firebird 2.8 V6 Rough Idle

thx., I'll try unpluging the mat. If it affects the idle, I guess that means it should be replaced
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