1993 Infiniti J30 Car idles rough

1993 INFINITI J30
157,000 MILES • 6 CYL • RWD • AUTOMATIC
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MBLICKB
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My J30 idles rough and idles rougher when I put it in gear, but runs pretty good when driving. I changed the spark plugs but still a bit rough on the idle. What are possible problems that could be causing this?
Mar 23, 2014 at 11:05 AM
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HMAC300
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scan for codes and check fuel pressure with a gauge first. autoparts rent gauge
Mar 23, 2014 at 11:54 AM
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MBLICKB
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I've got a friend who checked the code for me - no code showing up. He says it's a short somewhere. Does this make sense? Could a short cause a motor to idle rough. It isn't going to rattle apart, but it isn't quite right and sputters when you accelerate from a stand still. Once up to speed it's ok.
Mar 23, 2014 at 4:50 PM
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HMAC300
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check fuel pressure and for a vacuum leak like I said in first reply which you didn't say you did.
Mar 24, 2014 at 6:55 AM