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89 Pontiac Grand Am running rough...need help!


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TarHeel487
New User

Jun 24, 2010, 10:54 PM

Post #1 of 2 (1623 views)
89 Pontiac Grand Am running rough...need help! Sign In

I don't know a lot about cars, and this being my first car I am a little clueless, and haven't been through a lot with cars. Anyway, when I start it up, and it idles it sounds a little rough and sounds like its idling too high like it's trying to get some fuel or air. I take off and it hesitates a little getting up to about 30-40 and then it's fine. When I start slowing down it seems like it hesitates and putters from 60 down to about 45 then it's fine. Does anyone know what this might be? Also, I want to add sometimes when I'm riding along it just seems like it idles up possibly and putters.


(This post was edited by TarHeel487 on Jun 24, 2010, 10:56 PM)


Sidom
Veteran / Moderator
Sidom profile image

Jun 24, 2010, 11:24 PM

Post #2 of 2 (1613 views)
Re: 89 Pontiac Grand Am running rough...need help! Sign In

I would probably start off with making sure there isn't any vacuum leaks.

Listen to the engine while it's running and listen for any "hissing" noises, the could indicate a leak.
Also get a can of carb clean and spray around the vacuum hoses, lines, throttle body base & intake manifold, any change in idle would indicate a leak........






 
 
 






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