1987 Grand Prix

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  #1  
Old 03-20-03, 07:56 AM
sapphire
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1987 Grand Prix

I have a 87' Grand Prix that I am having a problem with the air conditioning on. Don't get me wrong, the air blows out really cold, but.....every time I turn it on the whole car runs a litte bit rougher. When I am pressing the gas pedal, it doesn't seem to ride too rough...but, when I am at a light idling then it feels like I am going to shake right out of my seat! Any suggestions?
 
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  #2  
Old 03-20-03, 09:16 AM
Joe_F
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You may need an idle adjustment or you may need to get into the carburetor for a rebuild.

Which engine? Also, have you done an alternator output test to see if the alternator is putting out sufficiently? Autozone and others will check the charging system free of charge.
 
  #3  
Old 03-24-03, 09:25 AM
sapphire
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Post 87' Pontiac Grand Prix

I have a 4.3, 6 cylinder engine. We were checking the engine while it was running and noticed that the pulley where the water pump is, kind of seems like it is loose. I was told that the bearings in the water pump may be bad and therefore I would need to replace the water pump......is this true?
 
  #4  
Old 03-24-03, 09:44 AM
Joe_F
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Sure sounds like it.
 
  #5  
Old 03-24-03, 09:47 AM
sapphire
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Thanx alot! I appreciate all the help. I will try this and if nothing changes, I will check back here with more questions.
 
  #6  
Old 03-24-03, 02:02 PM
Joe_F
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The 4.3 engine is fuel injected, not carbed. Check the alt. output and report back.
 
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