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1987 Grand Prix


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03-20-03, 07:56 AM   #1  
sapphire
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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03-20-03, 09:16 AM   #2  
Joe_F
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.

 
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03-24-03, 09:25 AM   #3  
sapphire
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?

 
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03-24-03, 09:44 AM   #4  
Joe_F
Sure sounds like it.

 
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03-24-03, 09:47 AM   #5  
sapphire
Thanx alot! I appreciate all the help. I will try this and if nothing changes, I will check back here with more questions.

 
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03-24-03, 02:02 PM   #6  
Joe_F
The 4.3 engine is fuel injected, not carbed. Check the alt. output and report back.

 
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